Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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If you have two resistors in
series with 12 volts across each resistor what is the voltage at the source?
a. | 12
volts | c. | 6
volts | b. | 24 volts | d. | 0 volts |
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2.
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Today’s LAN structure
uses what topology as the most common use for cable installation
a. | Bus | c. | Daisy chain | b. | Ring | d. | Star |
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3.
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In an A/V system, which cable
is considered the highest quality?
a. | Component | c. | RGBHV | b. | Composite | d. | S-Video |
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4.
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The advantages of fiber
are?
a. | Cheaper in
price | c. | More
durable | b. | Quicker to terminate | d. | Longer distance/bandwidth |
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5.
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The total opposition to the
flow of electrons is?
a. | Impedance | c. | Resistance | b. | Current | d. | Both a & c |
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6.
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What is a Wiegand
reader?
a. | A type of bar code
reader | c. | A specific format used in card
readers | b. | A high speed optical reader | d. | A device used with wireless access point to verify data
integrity |
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7.
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A compression driver
is:
a. | a seal-tite fitting used on high
conduit joints to prevent leakage | b. | software used to compress a hard disk | c. | the device that produces the high or mid frequency energy
that is fed into a horn or other relating device | d. | a subwoofer |
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8.
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In audio systems the term
“signal level” is equal to_________?
a. | amplitude | c. | volume control | b. | strength | d. | both A & B |
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9.
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What does “T/R/S”
stand for in an audio system:
a. | tight, round,
straight | c. | tip, ring,
sleeve | b. | tough, record, sleeve | d. | toss, recycle, safety |
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10.
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Which Ohm’s Law formula
is correct?
a. | I=V x R | c. | V=R / I | b. | V=I / R | d. | I=E / R |
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11.
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Which is the general formula
for electric power?
a. | P= I x
R | c. | P=V / R
| b. | P= I x
E | d. | P= I / R |
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12.
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When measuring current in a
circuit, what type of meter is commonly used?
a. | voltmeter | c. | ammeter | b. | ohmmeter | d. | watt meter |
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13.
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A ______ modular jack contains
connection points for two telephone pairs.
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14.
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Low voltage systems are not
capable of electrocution because:
a. | current is to
low | c. | Both A and
B | b. | voltage is to
low | d. | Low voltage systems can cause
electrocution |
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15.
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The ABC’s of CPR
are:
a. | Assess Breathing
Constantly | c. | Airway, Breathing
and Circulation | b. | Action, Basics and Control | d. | Assess, Basics and Control |
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16.
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Choose the item(s) required to
make a simple CCTV system work.
a. | camera and
lens | c. | monitor | b. | cable | d. | all the
above |
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17.
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According to the NEC, class 1
power limited circuits shall be supplied by a source having a rated output of not more than:
a. | 70V aand 1000
volt-amperes | c. | 30V and 1000
volt-amperes | b. | 10V and 1000 volt-amperes | d. | None of these |
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18.
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Two of the typical wavelengths
used in fiber optic transmission are:
a. | 675 and 1350
nanometers | c. | 850 and 1300
nanometers | b. | 450 and 900 millimeters | d. | 800 and 1200 nanoseconds |
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19.
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In a 70 volt speaker system,
the audio is distributed at a higher voltage and the stepped down at each speaker using a
__________.
a. | amplifier | c. | power supply | b. | transformer | d. | receptacle |
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20.
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Going off-hook closes _____
loop to generate a service request and the Switch returns a dial tone.
a. | the
ground | c. | the
trunk | b. | the current | d. | the tip/ring |
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21.
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Which zone, on a burglar alarm
would an exterior door contact be wired?
a. | Interior | c. | Perimeter | b. | 24-hour holdup | d. | Local access |
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22.
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Optical fiber cable is covered
under which of the following Articles of the NEC?
a. | Article
770 | c. | Article
810 | b. | Article 800 | d. | None of these |
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23.
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According to the NEC, metal
cable trays and wire ways ________ bonded to ground.
a. | shall not
be | c. | will
be | b. | shall
be | d. | will not be |
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24.
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What is the most popular fiber
for networking?
a. | coaxial | c. | multimode | b. | U.T.P | d. | singlemode |
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25.
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Which of the following optical
fiber cables are permitted to be installed in cable trays?
a. | OFCP | c. | OFN | b. | OFCR | d. | all of these |
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26.
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When measuring resistance in
circuit for a professional sound system, one would use a(n)___________.
a. | ammeter | c. | impedance bridge | b. | spectrum analyzer | d. | None of these |
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27.
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Which of the following best
describes the term “transceiver”?
a. | Electronics to support transmitting
and receiving | c. | Electronics to
stop overheating | b. | Electronics to prevent feedback | d. | Receiver |
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28.
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Near end Crosstalk (N.E.X.T)
is:
a. | Desirable in almost every
installation | c. | Undesired
induction of a signal from one pair to another | b. | Needed for the digital network to work
flawlessly | d. | Measured at the far end of the cable
for best results |
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29.
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The ______ test verifies the
pair to pin termination at each end and checks for errors.
a. | attenuation | c. | channel | b. | N.E.X.T | d. | wiremap |
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30.
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What is the most common type of
equipment used for video annotation?
a. | switcher | c. | monitor | b. | sharpie | d. | time/date generator |
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31.
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An LED can be designed to
emit:
a. | visible light or infrared
light | c. | only infrared
light | b. | only visible light | d. | visible light or ultraviolet
light |
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32.
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A screwdriver may be utilized
as a substitute for:
a. | Chisel | c. | Hole punch | b. | Pry bar | d. | None of these |
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33.
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The unit used to specify the
amount of resistance in a circuit is the:
a. | Volt | c. | Ampere | b. | Ohm | d. | Coulomb |
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34.
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If cameras are to be used
covertly at night, what type of light source should be used?
a. | infrared | c. | ultraviolet | b. | sodium | d. | visible |
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35.
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What does the format size
determine in a camera?
a. | focal length, focus range and lens
length | c. | lens length, focus range and
weight | b. | focal length, lens size and resolution | d. | resolved length, focus size and camera
length |
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36.
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What things need to be
considered when installing pan/tilt units?
a. | Is there enough horizontal clearance
for the total movement required? | c. | Will this unit be subject to wind-loading | b. | Is there enough vertical clearance for the total movement
required? | d. | all the
above |
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37.
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Which of the following is a
common use for a distributed sound system?
a. | background
music | c. | room stereo
systems | b. | intercoms | d. | all the above |
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38.
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Loudspeakers that operate below
300 Hz only are called ______.
a. | midrange | c. | super-tweeter loudspeakers | b. | subwoofers | d. | tweeters |
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39.
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The purpose of a block diagram
is to present the _______ of the equipment in a simple, readily accessible form.
a. | current
flow | c. | measurement
process | b. | logical structure | d. | wiring diagram |
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40.
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What device is used to boost a
weaker audio signal to a level suitable for further mixing and signal
processing?
a. | amplifier | c. | mixer | b. | mixing console | d. | preamplifier |
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41.
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Which of the following best
describes acoustic feedback?
a. | echo
effect | c. | low pitched
squeal | b. | high pitched squeal | d. | both b and c |
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42.
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The _____ the impedance of the
path, the ________ the current that will flow through the overcurrent device.
a. | lower /
lower | c. | higher /
higher | b. | lower / higher |
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43.
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What designation is expected to
be printed on communication cables listed for use in risers within an office
building?
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44.
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Multiple telecommunications
rooms on the same floor shall be interconnected by a minimum of one ___________ inch conduit or
equivalent pathway.
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45.
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A _______ is used to measure
optical power.
a. | dispersion
meter | c. | power
meter | b. | light source | d. | volt ohmmeter |
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46.
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The _______ is the unit of area
used to measure the cross sectional area of wire.
a. | circular
inch | c. | square
inch | b. | circular mil | d. | square mil |
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47.
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Which type of voltage can be
tested using a solenoid-type voltage tester?
a. | AC
voltage | c. | battery
voltage | b. | AC and DC voltage | d. | DC voltage |
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48.
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If you increase the voltage in
a series circuit, the current will _________.
a. | decrease | c. | increase | b. | double | d. | remain the
same |
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49.
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The unit of electromotive force
is the _______.
a. | ampere | c. | ohm | b. | volt | d. | watt |
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50.
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The total power consumed in a
parallel circuit is _________ the power consumed in each branch.
a. | always less
than | c. | the reciprocal
of | b. | the product
of | d. | the sum of |
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