Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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When installing a equipment
rack, what is the minimum distance it can be installed from an Electrical panel?
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2.
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What is the 3dB
rule?
a. | If the distance to the speakers is
cut by half, the volume is increased by 3dB. | c. | If you add a speaker you must increase the volume 3dB
| b. | If you double the wattage on the
load you increase the volume by only 3dB. | d. | Increasing 3dB triples the power |
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3.
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What is the “one arm
rule”?
a. | you need to always have one hand on
a ladder | c. | one arm should
always the minimum distance when working next to high voltage | b. | The tension when pulling cat 5 cable should not exceed
that when pulling with one arm | d. | when carrying a ladder one arm should always be free to hold open
doors |
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4.
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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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5.
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What does the acronym AFF stand
for?
a. | The measurement from the foundation
to the bottom of the box | c. | The measurement from the center of the box to the finished floor
| b. | The measurement from the bottom of
the box to the finished floor | d. | none of
these |
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6.
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What is the typical AWG size
for a CAT 5 cable?
a. | 26-24
AWG | c. | 20-18
AWG | b. | 24-22 AWG | d. | 18-16 AWG |
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7.
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If you suspect hazardous dust
is in the area you are working you should __________.
a. | get a mask then continue to work
| c. | leave the area right away and report
to you supervisor | b. | spray the area with water then continue to
work | d. | try and stay as low as
possible |
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8.
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What cable is an ST connector
used on?
a. | Fiber | c. | 18-2 | b. | Coax | d. | 4pr communication |
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9.
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Adjusting a room acoustically,
you would use ______ noise.
a. | Pink | c. | Music | b. | White | d. | intermittent |
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10.
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An Insulation Displacement
Connector is for?
a. | Coax | c. | UTP | b. | Fiber | d. | Protection |
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11.
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What term is used to describe a
locking device that locks during a power or equipment failure?
a. | Delayed
egress | c. | Fail
secure | b. | False Alarm | d. | Fail safe |
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12.
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The industry standard for
XLR-type connector pin out is:
a. | Pin 1, pos; Pin 2, neg; Pin 3,
Gnd | b. | Pin 1, Gnd; Pin 2, pos; Pin 3, neg | c. | Pin 1, neg; Pin 2, pos; Pin 3,
neg | d. | Pin 1, Gnd; Pin 2, pos; Pin 3,
N/C |
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13.
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A ladder top should extend at
least ________ inches above the roof edge of a building when used as access to the roof of a
building.
a. | 6
inches | c. | 24
inches | b. | 12 inches | d. | 36
inches |
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14.
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In a typical wiring, the
blue-white pair is used for:
a. | Control
functions | c. | Bridging | b. | Tip & Ring | d. | None of these |
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15.
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Where do you use bridging
clips?
a. | An
RJ-31X | c. | Telephone switching
system | b. | A 66 block | d. | Across Tip & Ring line |
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16.
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The type of cable that is
generally used to connect a camera to a monitor in a CCTV system is:
a. | 24 GA twisted pair, with an overall
shield | c. | RG-59 coaxial
cable | b. | RG-59 or RG-6 | d. | Category 5 10 Base T |
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17.
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A series circuit always has
______ current path(s).
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18.
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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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19.
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What type of fiber cable is
used by the telephone industry for long distance communications, where the bandwidth is essentially
infinite?
a. | multimode | c. | U.T.P | b. | singlemode | d. | F.J.M |
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20.
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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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21.
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If an ohmmeter test shows that
a diode has an extremely high resistance in each direction, the diode:
a. | is probably
good | c. | is
defective | b. | is probably shorted | d. | may still be usable in most
applications |
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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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How many conductors are needed
to “a balanced” microphone connection (not including the shield):
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24.
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The primary or tip colors
are:
a. | Blue, orange, green, brown,
slate | c. | Red, white, blue, yellow,
green | b. | White, red, black, yellow, violet | d. | Green, yellow, red |
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25.
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The main cause of job-related
eye injuries is:
a. | Electrical
hazards | c. | Dust or
powders | b. | Lasers | d. | Flying objects or
particles |
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26.
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A time-lapse VCR that records
in real time during an alarm condition needs a(n):
a. | Extra long-play
videotape | c. | Alarm Contact
Closure | b. | Built in monitor | d. | Time/Date Generator |
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27.
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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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28.
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What can be an ignition source
for liquids that are flammable?
a. | Cutting
torch | c. | Sparking hand
tools | b. | Burning cigarette | d. | All of these |
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29.
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In a security system, the EOL
resistor for a zone should be mounted:
a. | In a PIR or door
contact | c. | At the first
device across the loop wires | b. | Across the power circuit at the end of the
loop | d. | At the last device across the loop wires, but after the
initiation switch |
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30.
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In an audio system, an
equalizer is normally installed:
a. | Before the power
amplifier | c. | After the power
amplifier | b. | Before the mixer |
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31.
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In a high frequency driver, the
diaphragm is:
a. | coned | c. | formed | b. | domed | d. | Styrofoam |
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32.
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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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33.
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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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34.
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When using 24-volts AC to power
CCTV equipment, you would use a __________ transformer.
a. | class 1 | c. | rectifying | b. | class 2 | d. | step-up |
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35.
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What does the “.1”
stand for in Dolby 5.1 system?
a. | center
channel | c. | mono rear
channel | b. | limited bandwidth channel | d. | version 1 |
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36.
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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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37.
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A series of _____ is the
simplest form of output from an automation system.
a. | contractors | c. | macros | b. | integrated circuits | d. | relay contacts |
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38.
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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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39.
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What must be done to a sound
masking system so that all frequencies fall within the preferred sound masking
curve?
a. | All noise must be removed from the
environment. | c. | The input signal
must be balanced. | b. | It must be tuned. | d. | The output voltage must be
adjusted. |
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40.
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“The portion of the
wiring system between the load side of the overcurrent device or power-limited supply and the
connected equipment”, is the definition of a _______.
a. | Class 1
circuit | c. | Class 3
circuit | b. | Class 2 circuit | d. | Circuit Integrity cable |
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41.
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The single most important thing
you can do to increase your level of safety is to be ____________.
a. | aware | c. | isolated | b. | insulated | d. | quick |
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42.
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Current in a DC circuit will
always flow in _____________ direction.
a. | a
negative | c. | alternating | b. | a positive | d. | one |
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43.
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Decreasing the resistance of a
circuit will cause the _____________.
a. | current to
decrease | c. | voltage to
decrease | b. | current to increase | d. | voltage to increase |
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44.
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It is clear to most people who
have worked in the construction trades that a dirty jobsite is ______________.
a. | a dangerous
jobsite | c. | the accepted
standard in our industry | b. | a productive jobsite | d. | the customer’s problem and
responsibility |
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45.
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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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46.
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Convert the following value-
212 mA = _______ amps
a. | 0.000212 | c. | 0.212 | b. | 0.0212 | d. | 212 |
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47.
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Chapter 8 of the NEC covers
___________ systems and is not subject to the requirements of the other chapters except where they
are specifically referenced therein.
a. | communications | c. | grounding | b. | computer | d. | definitions |
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48.
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If you decrease 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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What type of failures may show
up on a test instrument, if during installation the proper twist at the connection points were not
maintained?
a. | NEXT and
PSNEXT | c. | Return
Loss | b. | PSELFEXT | d. | All of these |
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50.
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When batteries are connected in
parallel, their voltages remain the same and their amp-hour capacities ________.
a. | are
added | c. | are
subtracted | b. | are averaged | d. | remain the same |
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