﻿<?xml version="1.0" encoding="UTF-8"?>
<quiz>
<question type="category">
<category>
<text>$course$/Use of power lines for transmission of messages (PLC, BPL)/Use of power lines for transmission of messages (PLC, BPL)</text>
</category>
</question>
<question type="multichoice">
<name>
<text><![CDATA[The abbreviation PLC encompasses:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[The abbreviation PLC encompasses:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[systems for telecommunication over cables]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[specifically, narrowband telecommunication systems using power lines]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[specifically, broadband telecommunication systems using power lines]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[broadband as well as narrowband telecommunication systems using power lines]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Ripple control systems in power distribution network use the band:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Ripple control systems in power distribution network use the band:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[10 kHz – 100 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[up to 100 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[217 Hz – 1050 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[30 kHz – 150 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Ripple control transmitters can not be connected to the power distribution network at the secondary side of transformers:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Ripple control transmitters can not be connected to the power distribution network at the secondary side of transformers:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[very high voltage / high voltage]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[high voltage / high voltage]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[high voltage / low voltage]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[very high voltage / low voltage]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[The structure of ripple control code sequence with serial double-commands is as follows:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[The structure of ripple control code sequence with serial double-commands is as follows:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[starting impulse – security space – command part]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[starting impulse – security space – address part – command part]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[starting impulse – security space – command part – address part]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[starting impulse – address part – command part]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[The operating frequencies commonly used in ripple control systems do correspond to:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[The operating frequencies commonly used in ripple control systems do correspond to:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[the band 200 Hz – 300 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[the frequencies corresponding to odd harmonics of the technological frequency 50 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[the band 1000 Hz – 3000 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[the band 150 Hz – 500 Hz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Duration of the command code most commonly used in the Czech Republic is:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Duration of the command code most commonly used in the Czech Republic is:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="100">
<text><![CDATA[64 s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[33 s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[120 s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[125 s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Parameters of high-frequency PLC systems in the Czech Republic are the following:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Parameters of high-frequency PLC systems in the Czech Republic are the following:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[HF band 10 kHz – 150 kHz,  LF bandwidth 4 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[HF band 30 kHz – 150 kHz, LF bandwidth 2.5 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[HF band 30 kHz – 750 kHz, LF bandwidth 2.5 kHz or 4 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[HF band 150 kHz – 1000 kHz, LF bandwidth 4 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Narrowband PLC systems use (according to the EN 50065-1 standard) the band:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Narrowband PLC systems use (according to the EN 50065-1 standard) the band:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[0.25 MHz – 0.75 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[3 kHz – 148.5 kHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[from tens up to hundreds of kHz, with transmission speeds from units up to hundreds of Mbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[from units up to hundreds of MHz, with transmission speeds from tens up to hundreds of kbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Broadband PLC systems (BPL) operate most usually with the following parameters:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Broadband PLC systems (BPL) operate most usually with the following parameters:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="100">
<text><![CDATA[bandwith from units up to hundreds of MHz, transmission speed from units up to hundreds of Mbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[bandwith from units up to hundreds of MHz, transmission speed from units up to tens of Mbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[bandwith from tens up to hundreds of kHz, transmission speed from units up to hundreds of Mbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[bandwith from units up to hundreds of MHz, transmission speed from units up to hundreds of kbit/s]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[BPL systems in public power distribution network (outdoor part) most commonly use the frequecies:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[BPL systems in public power distribution network (outdoor part) most commonly use the frequecies:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[148.5 kHz – 1 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[1MHz – 18 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[10 MHz – 52 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[1 MHz – 30 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[BPL systems in private section of the power distribution network (indoor part – i.e. in buildings) commonly use the frequencies:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[BPL systems in private section of the power distribution network (indoor part – i.e. in buildings) commonly use the frequencies:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[148.5 kHz – 1 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[1MHz – 18 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[10 MHz – 52 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[18 MHz – 30 MHz]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[BPL systems most commonly use the following modulation methods:]]></text>
</name>
<questiontext format="html">
<text><![CDATA[BPL systems most commonly use the following modulation methods:]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[amplitude modulation with suppressed carrier]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[frequency modulation]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[spread-spectrum modulation – DSSM, modulation with transmission in separate subbands – OFDM]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[combination of amplitude modulation and pulse-code modulation]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Which modulation allows selective disabling of a disturbed frequency band at the expense of lower transmission speed?]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Which modulation allows selective disabling of a disturbed frequency band at the expense of lower transmission speed?]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[DSSM]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[PCM]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[OFDM]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[FM]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Which PLC systems suffer from the most serious EMC problems?]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Which PLC systems suffer from the most serious EMC problems?]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[HDO]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[HF power plants telephony]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[Narrowband systems for local telematics]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[Broadband (BPL) systems]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Contemporary overhead very-high voltage power lines  use for communication purposes optical cable]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Contemporary overhead very-high voltage power lines  use for communication purposes optical cable]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[that is led in parallel with power wires]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[that is woven into a pair of phase wires]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[that is woven into the ground protective wire]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[that is woven into one phase wire]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Ripple control systems in power distribution network are used to transmit signals]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Ripple control systems in power distribution network are used to transmit signals]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[in both directions over a branched network]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[in one direction over a branched network]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[in both directions over a non-branched network]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[in one direction over a non-branched network]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Static frequency converters in ripple control transmitters on the secondary side of a 110 kV / 22 kV transformer commonly operate with the output power]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Static frequency converters in ripple control transmitters on the secondary side of a 110 kV / 22 kV transformer commonly operate with the output power]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[1 kVA]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[10 kVA]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[100 kVA]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[800 VA]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[The ripple control receivers using the principle of serialized double-commands can recognize]]></text>
</name>
<questiontext format="html">
<text><![CDATA[The ripple control receivers using the principle of serialized double-commands can recognize]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[up to ten double-commands]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[tens of double-commands]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[hundreds of double-commands]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[thousands of double-commands]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Which applications cannot be implemented with the help of ripple control?]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Which applications cannot be implemented with the help of ripple control?]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[switching of rates in electricity meters]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[distribution systems coupled with remote control]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[distribution systems of warning signals]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[remote control of public lighting]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>

<question type="multichoice">
<name>
<text><![CDATA[Narrowband telematic PLC systems can commonly reach the distance of]]></text>
</name>
<questiontext format="html">
<text><![CDATA[Narrowband telematic PLC systems can commonly reach the distance of]]></text>
</questiontext>
<image></image>
<generalfeedback>
<text></text>
</generalfeedback>
<defaultgrade>1</defaultgrade>
<penalty>0.1</penalty>
<hidden>0</hidden>
<shuffleanswers>1</shuffleanswers>
<single>true</single>
<shuffleanswers>true</shuffleanswers>
<correctfeedback>
<text></text>
</correctfeedback>
<partiallycorrectfeedback>
<text></text>
</partiallycorrectfeedback>
<incorrectfeedback>
<text></text>
</incorrectfeedback>
<answernumbering>none</answernumbering>
<answer fraction="0">
<text><![CDATA[tens of meters]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[tens of kilometers]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="100">
<text><![CDATA[hundreds of meters, up to approx. 5 km]]></text>
<feedback>
<text></text>
</feedback>
</answer>
<answer fraction="0">
<text><![CDATA[up to approx. 50 km]]></text>
<feedback>
<text></text>
</feedback>
</answer>
</question>


</quiz>

