ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <meta name='generator' content='ExamView Pro 3.51 [Windows 4.10 (2222)]'> <title>chapter 8</title> <STYLE TYPE="text/css"> .spacer { line-height:.7em; } .title { font-size:13pt; font-weight:bold; font-family:"Times New Roman", "Times", serif;color:#000000; } .qnumber { font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000; text-indent:12pt; text-align:right; } </STYLE> <script language='JavaScript1.1'> <!-- // Copyright (c) 2000 FSCreations, Inc. var listMap = '1111111111'; var qtypeMap = '0002222222'; var ansMap = new Array(10); ansMap[0] = 'T'; ansMap[1] = 'T'; ansMap[2] = 'F'; ansMap[3] = 'A'; ansMap[4] = 'D'; ansMap[5] = 'D'; ansMap[6] = 'A'; ansMap[7] = 'B'; ansMap[8] = 'C'; ansMap[9] = 'B'; function GradeIt(f) { var studentName; var numBlank = 0; var numCorrect = 0; var numPossible = 0; var numSubjective = 0; var currentInstruction; var currentNarrative; var scorePercent; var index; var msg; var text; var i; var showNotes = true; var showRef = false; var numQuestions = 10; var numInstructions = 2; var numNarratives = 0; var prefixText = new Array(10); var numberText = new Array(10); var questionText = new Array(10); var answerText = new Array(10); var responseText = new Array(10); var notesText = new Array(10); var refText = new Array(10); var narrativeIndex = new Array(0); var narrativeText = new Array(0); var instructionIndex = new Array(2); var instructionText = new Array(2); var listMap = '1111111111'; var titleString = 'chapter 8'; var titleStyle = 'font-size:13pt; font-weight:bold; font-family:"Times New Roman", "Times", serif;color:#000000;'; var qnumberStyle = 'font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000; text-indent:12pt; text-align:right;'; var defaultStyle = 'font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000;'; instructionText[0] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'><b>True/False</b><br></span></div><div><span style=\'font-family:"Times New Roman", ' + '"Times", serif; font-size:12pt; color:#000000\'><i>Indicate whether the sentence or statement is true ' + 'or false.</i></span></div>'; instructionText[1] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'><b>Multiple Choice</b><br></span></div><div><span style=\'font-family:"Times New Roman", ' + '"Times", serif; font-size:12pt; color:#000000\'><i>Identify the letter of the choice that best ' + 'completes the statement or answers the question.</i></span></div>'; instructionIndex[0] = 0; instructionIndex[1] = 3; numberText[0] = '1.'; questionText[0] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>Telephones usually contain a hybrid coil or an equivalent circuit.</span></div>'; answerText[0] = '<div class=\'default\'>T</div>'; notesText[0] = ''; numberText[1] = '2.'; questionText[1] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>In a telephone ' + 'system, signal strength is given relative to the zero transmission loss point.</span></div>'; answerText[1] = '<div class=\'default\'>T</div>'; notesText[1] = ''; numberText[2] = '3.'; questionText[2] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>TDM is being ' + 'replaced by the newer FDM technology in telephone systems.</span></div>'; answerText[2] = '<div class=\'default\'>F</div>'; notesText[2] = ''; numberText[3] = '4.'; questionText[3] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>PSTN stands ' + 'for:</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Public Switched Telephone Network</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Primary Service Telephone Network</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Private Switched Telephone Network</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Primary Service Telephone Numbers</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[3] = '<div class=\'default\'>A</div>'; notesText[3] = ''; numberText[4] = '5.'; questionText[4] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>POTS stands ' + 'for:</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Private Office Telephone System</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Primary Operational Test System</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Primary Office Telephone Service</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Plain Old Telephone Service</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[4] = '<div class=\'default\'>D</div>'; notesText[4] = ''; numberText[5] = '6.'; questionText[5] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>Call blocking:</span></div><div ' + 'style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>cannot occur in the public telephone network</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>occurs on the local loop when there is an electrical power ' + 'failure</span></div></td></tr><tr valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", ' + '"Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>occurs only on ' + 'long-distance cables</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>occurs when the central office capacity is ' + 'exceeded</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'95%\' style=\'width:405pt; padding:0\'></td></tr></table>'; answerText[5] = '<div class=\'default\'>D</div>'; notesText[5] = ''; numberText[6] = '7.'; questionText[6] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>The cable used ' + 'for local loops is mainly:</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>twisted-pair copper wire</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>coaxial cable</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>shielded twisted-pair copper wire</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>fiber-optic</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[6] = '<div class=\'default\'>A</div>'; notesText[6] = ''; numberText[7] = '8.'; questionText[7] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>DC current ' + 'flows through a telephone:</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>when it is on hook</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>as long as it is attached to a local loop</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>when it is off hook</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>only when it is ringing</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[7] = '<div class=\'default\'>B</div>'; notesText[7] = ''; numberText[8] = '9.'; questionText[8] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>The bandwidth ' + 'of voice-grade signals on a telephone system is restricted in order to:</span></div><div ' + 'style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>allow lines to be ' + '&quot;conditioned&quot;</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", ' + 'serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>allow signals to be ' + 'multiplexed</span></div></td></tr><tr valign=\'baseline\'><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>b.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>prevent &quot;singing&quot;</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>all of the above</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[8] = '<div class=\'default\'>C</div>'; notesText[8] = ''; numberText[9] = '10.'; questionText[9] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000\'>ADSL stands ' + 'for:</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>All-Digital Subscriber Line</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Allocated Digital Service Line</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Asymmetrical Digital Subscriber Line</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>Access to Data Services Line</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[9] = '<div class=\'default\'>B</div>'; notesText[9] = ''; studentName = StripSpaces(f.student_name.value); FixMTF(f); index = 0; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf(":") > 0) { text = StripSpaces(GetResponse(index, f.elements[i])); if (text.length == 0) ++numBlank; ++index; } } if (studentName == "") { alert("Student name cannot be blank."); return(false); } if (numBlank > 0) { if (numBlank == 1) msg = "1 question"; else msg = numBlank + " questions"; if (!confirm("You have not answered " + msg + " Are you sure you want to end the test?")) return(false); } index = 0; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf(":") > 0) { text = GetResponse(index, f.elements[i]); if (ansMap[index] == "") { prefixText[index] = "<img src='/companions/quiz/examview_graphics/nograde.gif' align='middle'>"; ++numSubjective; } else { isCorrect = ScoreAnswer(index, text); if (isCorrect) ++numCorrect; ++numPossible; prefixText[index] = BuildPrefixText(index, text, isCorrect); } responseText[index] = TranslateHtmlString(text); ++index; } } if (showNotes) { for (i=0; i < numQuestions; ++i) { if (qtypeMap.charAt(i) == "2") notesText[i] = FixMCNotes(notesText[i], responseText[i]); } } if (numPossible > 0) scorePercent = Math.round(100.0 * numCorrect / numPossible); else scorePercent = 0; studentName = TranslateHtmlString(studentName); document.writeln("<html>\n<head>"); document.writeln("<title>" + titleString + "</title>"); document.writeln("<style type='text/css'>"); document.writeln("\t.qnumber { " + qnumberStyle + " }"); document.writeln("\t.title { " + titleStyle + " }"); document.writeln("\t.default { " + defaultStyle + " }"); document.writeln("\t.spacer { line-height:.7em; }"); document.writeln("</style>\n</head>"); document.writeln("<body bgcolor='#FFFFFF' style='background-image:url(chapter8_files/header.gif); background-repeat:no-repeat'>"); document.writeln("<b>Name:</b> " + studentName + "<br>"); document.write("<b>Score:</b> " + numCorrect + " / " + numPossible + " (" + scorePercent + "%)"); if (numSubjective > 0) { document.write("&nbsp;&nbsp;&nbsp;&nbsp; [" + numSubjective + " subjective "); if (numSubjective == 1) document.write("question"); else document.write("questions"); document.write(" not graded]"); } document.writeln("<br><br>"); document.writeln("<div class='title'>" + titleString + "</div><br>"); document.writeln("<table align='left' width='100%' border=0 cellpadding=0 cellspacing=0>"); currentInstruction = 0; currentNarrative = 0; for (i=0; i < numQuestions; ++i) { if (currentInstruction < numInstructions) { if (instructionIndex[currentInstruction] == i) { document.writeln("<tr><td colspan='3'><br>"); document.writeln(instructionText[currentInstruction]); document.writeln("<div class='spacer'>&nbsp;</div>"); document.writeln("</td></tr>"); ++currentInstruction; } } if (currentNarrative < numNarratives) { if (narrativeIndex[currentNarrative] == i) { document.writeln("<tr><td></td><td></td><td>"); document.writeln(narrativeText[currentNarrative]); document.writeln("<div class='spacer'>&nbsp;</div>"); document.writeln("</td></tr>"); ++currentNarrative; } } document.writeln("<tr valign='baseline'>"); document.writeln("<td>" + prefixText[i] + "</td>"); document.writeln("<td><p class='qnumber'>" + numberText[i] + "&nbsp;</p></td>"); document.writeln("<td width='100%'>" + questionText[i]); document.writeln("<div style='font-size:2pt'></div><br>"); document.writeln("<table valign='baseline' cellpadding=0 cellspacing=0 border=0>"); if (listMap.charAt(i) != "1") { document.writeln("<tr valign='baseline'><td><p class='default'><b>RESPONSE:&nbsp;</b></p></td>"); document.writeln("<td><p class='default'>" + responseText[i] + "</p></td></tr>"); } document.writeln("<tr valign='baseline'><td><p class='default'><b>ANSWER:&nbsp;</b></p></td>"); document.writeln("<td>" + answerText[i] + "</td></tr>"); if (showNotes) { document.writeln("<tr valign='baseline'><td><p class='default'><b>NOTES:&nbsp;</b></p></td>"); document.writeln("<td>" + notesText[i] + "</td></tr>"); } if (showRef) { document.writeln("<tr valign='baseline'><td><p class='default'><b>REF:&nbsp;</b></p></td>"); document.writeln("<td>" + refText[i] + "</td></tr>"); } document.writeln("</table>"); document.writeln("<div class='spacer'>&nbsp;</div></td></tr>"); } document.writeln("</table>"); document.writeln("<br clear='all'>"); document.writeln("<table align='left' width='100%' cellpadding=0 cellspacing=0 border=0>"); document.writeln("<tr><td colspan='2' bgcolor='#000000'><div style='font-size:1pt'>&nbsp;</div></td></tr>"); document.write("<tr><td valign='top'><a href='" + window.location.href + "'>"); document.writeln("<img src='/companions/quiz/examview_graphics/retake.gif' border=0 alt='Retake Test'></a></td>"); document.writeln("<td valign='top' align='right'>"); document.write("<a href='http://www.examview.com/studytip.html'>"); document.writeln("<img src='/companions/quiz/examview_graphics/help.gif' border=0 alt='Help'></a>"); document.writeln("</td></tr></table>"); document.writeln("</body>"); document.writeln("</html>"); document.close(); return(false); } function GetResponse(answerIndex, answer) { var listIndex; var responseText; if (listMap.charAt(answerIndex) == "1") { listIndex = answer.selectedIndex; responseText = answer.options[listIndex].text; } else responseText = answer.value; return(responseText); } function ScoreAnswer(answerIndex, responseText) { var listIndex; var answerText; answerText = ansMap[answerIndex]; if (qtypeMap.charAt(answerIndex) == "4") return(NumericCompare(responseText, answerText)); else if (qtypeMap.charAt(answerIndex) == "5") return(MultiCompare(responseText, answerText)); else if (responseText.toUpperCase() == answerText.toUpperCase()) return(true); else return(false); } function BuildPrefixText(answerIndex, responseText, isCorrect) { var text; var listIndex; text = "<pre>" if (isCorrect) text += "<img src='/companions/quiz/examview_graphics/correct.gif' align='middle'>" else text += "<img src='/companions/quiz/examview_graphics/wrong.gif' align='middle'>" if (listMap.charAt(answerIndex) == "1") { if (responseText.length == 0) responseText = " "; text += "<u> " + responseText + " </u>"; } text += "</pre>" return(text); } function StripSpaces(s) { var len; var i; len = s.length; for (i=len - 1; i >= 0 && s.charAt(i) == " "; --i) len = i; if (len == 0) s = ""; else if (len != s.length) s = s.substring(0, len); return(s); } function TranslateHtmlString(text) { var newText; var replaceString; var position; var length; var breakPos; var skipExtra; var i; newText = ""; position = 0; length = text.length; while (position < length) { skipExtra = 0; breakPos = -1; for (i=position; i < length && breakPos < 0; ++i) { switch(text.charAt(i)) { case '>': replaceString = "&gt;"; 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searchText = "/" + String.fromCharCode(charCode) + "/"; startIndex = upperNotes.indexOf(searchText); if (startIndex >= 0) { startIndex += searchText.length; searchText = "/" + String.fromCharCode(charCode + 1) + "/"; endIndex = upperNotes.indexOf(searchText, startIndex); if (endIndex < startIndex) endIndex = notesText.length; displayText = notesText.substring(startIndex, endIndex); } else if (notesText.charAt(0) != "/") displayText = notesText; } return(displayText); } function NumericCompare(s1, s2) { var s1Sign; var s2Sign; var tempString; var decimalCount; var decimalPos; var numToDelete; var len; var ch; var i; s1.toUpperCase(); s2.toUpperCase(); if (s1 == s2) return(true); else { s1Sign = 1; s2Sign = 1; tempString = ""; for (i=0; i < s1.length; ++i) { ch = s1.charAt(i); if (ch == "-" && tempString.length == 0) s1Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s1 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s1.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s1.charAt(i) == '0') len = i; else break; } if (len < s1.length) s1 = s1.substring(0, len); if (s1.length == 0) s1 = "0"; } numToDelete = 0; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s1.length) --numToDelete; if (numToDelete > 0) s1 = s1.substring(numToDelete); } ///////////////////////////////////////////// tempString = ""; for (i=0; i < s2.length; ++i) { ch = s2.charAt(i); if (ch == "-" && tempString.length == 0) s2Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s2 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s2.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s2.charAt(i) == '0') len = i; else break; } if (len < s2.length) s2 = s2.substring(0, len); if (s2.length == 0) s2 = "0"; } numToDelete = 0; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s2.length) --numToDelete; if (numToDelete > 0) s2 = s2.substring(numToDelete); } if (s1Sign == s2Sign && s1 == s2) return(true); } return(false); } function MultiCompare(responseText, answerText) { var startIndex; var endIndex; var partialText; responseText = responseText.toUpperCase(); answerText = answerText.toUpperCase(); startIndex = 0; do { endIndex = answerText.indexOf("\r", startIndex); if (endIndex < 0) partialText = answerText.substring(startIndex); else partialText = answerText.substring(startIndex, endIndex); if (responseText == partialText) return(true); startIndex = endIndex + 1; } while (endIndex > 0); return(false); } function FixMTF(f) { var text; var letter; var theList; var listIndex; var number; var i; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf("MTF:") == 0) { number = parseInt(f.elements[i].name.substring(4), 10); theList = f["MTF-" + number + "-1"]; if (theList) { listIndex = theList.selectedIndex; letter = theList.options[listIndex].text; } else letter = ""; text = StripSpaces(f["MTF-" + number + "-2"].value); if (text == "") f.elements[i].value = letter; else f.elements[i].value = letter + "," + text; } } } function AllowReset() { return(window.confirm("Do you want to clear all of your answers?")); } // --> </script> </head> <body onResize='if(document.layers && navigator.appVersion.indexOf("Win") < 0){history.go(0);}' bgcolor='#FFFFFF' style='background-image:url(chapter8_files/header.gif); background-repeat:no-repeat'> <noscript> <h3><font color='#FF0000'>Javascript not enabled</font></h3> </noscript> <script language='JavaScript'> <!-- if (navigator.appName.indexOf("Netscape") >= 0) { if (parseInt(navigator.appVersion.charAt(0)) < 4) alert("This document requires Netscape Navigator version 4.0 or later."); } else if (navigator.appName.indexOf("Explorer") >= 0) { if (parseInt(navigator.appVersion.charAt(0)) < 4) alert("This document requires Internet Explorer version 4.0 or later."); } // --> </script> <form name='TestForm' onReset='return(AllowReset(this))'> <table align='left' width='100%' border=0 cellspacing=0> <tr valign='top'> <td> <div class='headerspacer'>&nbsp;</div> <b>Name:</b>&nbsp;<input type='text' name='student_name' size='30'><br> <div class='spacer'>&nbsp;</div> <br> <p class="title">chapter 8</p> </td> </tr> </table> <br clear='all'> <table align='left' width='100%' border=0 cellpadding=0 cellspacing=0> <!-- BEGIN: INSTRUCTION --> <tr valign='top'> <td colspan='3'><br> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><b>True/False</b><br></span></div><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><i>Indicate whether the sentence or statement is true or false.</i></span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: INSTRUCTION --> <!-- BEGIN: QUESTION -65537:27 --> <tr valign='baseline'> <td> <select name='TF:1' align='top'> <option value=' '> <option value='T'>T <option value='F'>F </select> </td> <td> <p class='qnumber'>1.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Telephones usually contain a hybrid coil or an equivalent circuit.</span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:27 --> <!-- BEGIN: QUESTION -65537:38 --> <tr valign='baseline'> <td> <select name='TF:2' align='top'> <option value=' '> <option value='T'>T <option value='F'>F </select> </td> <td> <p class='qnumber'>2.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>In a telephone system, signal strength is given relative to the zero transmission loss point.</span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:38 --> <!-- BEGIN: QUESTION -65537:39 --> <tr valign='baseline'> <td> <select name='TF:3' align='top'> <option value=' '> <option value='T'>T <option value='F'>F </select> </td> <td> <p class='qnumber'>3.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>TDM is being replaced by the newer FDM technology in telephone systems.</span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:39 --> <!-- BEGIN: INSTRUCTION --> <tr valign='top'> <td colspan='3'><br> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><b>Multiple Choice</b><br></span></div><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><i>Identify the letter of the choice that best completes the statement or answers the question.</i></span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: INSTRUCTION --> <!-- BEGIN: QUESTION -65537:52 --> <tr valign='baseline'> <td> <select name='MC:4' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>4.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>PSTN stands for:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Public Switched Telephone Network</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Primary Service Telephone Network</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Private Switched Telephone Network</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Primary Service Telephone Numbers</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:52 --> <!-- BEGIN: QUESTION -65537:53 --> <tr valign='baseline'> <td> <select name='MC:5' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>5.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>POTS stands for:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Private Office Telephone System</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Primary Operational Test System</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Primary Office Telephone Service</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Plain Old Telephone Service</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:53 --> <!-- BEGIN: QUESTION -65537:58 --> <tr valign='baseline'> <td> <select name='MC:6' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>6.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Call blocking:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>cannot occur in the public telephone network</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>occurs on the local loop when there is an electrical power failure</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>occurs only on long-distance cables</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>occurs when the central office capacity is exceeded</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='95%' style='width:405pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:58 --> <!-- BEGIN: QUESTION -65537:60 --> <tr valign='baseline'> <td> <select name='MC:7' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>7.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>The cable used for local loops is mainly:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>twisted-pair copper wire</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>coaxial cable</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>shielded twisted-pair copper wire</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>fiber-optic</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:60 --> <!-- BEGIN: QUESTION -65537:63 --> <tr valign='baseline'> <td> <select name='MC:8' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>8.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>DC current flows through a telephone:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>when it is on hook</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>as long as it is attached to a local loop</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>when it is off hook</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>only when it is ringing</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:63 --> <!-- BEGIN: QUESTION -65537:68 --> <tr valign='baseline'> <td> <select name='MC:9' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>9.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>The bandwidth of voice-grade signals on a telephone system is restricted in order to:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>allow lines to be &quot;conditioned&quot;</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>allow signals to be multiplexed</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>prevent &quot;singing&quot;</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>all of the above</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:68 --> <!-- BEGIN: QUESTION -65537:81 --> <tr valign='baseline'> <td> <select name='MC:10' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>10.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>ADSL stands for:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>All-Digital Subscriber Line</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Allocated Digital Service Line</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Asymmetrical Digital Subscriber Line</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>Access to Data Services Line</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -65537:81 --> </table> <br clear='all'> <br> <br> <TABLE ALIGN='LEFT' WIDTH='100%' CELLPADDING='0' CELLSPACING='0' BORDER='0'> <TR> <TD COLSPAN='2' BGCOLOR='#000000'> <DIV STYLE='font-size:1pt'>&nbsp;</DIV> </TD> </TR> <TR> <TD> <a href='javascript:alert("Use the mouse to submit.")' onMouseOver='window.status = "Check Your Work"; 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