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 a return air
ceiling what kind of cable would you install?
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2.
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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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3.
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How many connectors would be
required on a face plate if you needed composite(RCA), 2 BNC and stereo speaker
connections?
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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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You are pulling feeder cables
to a MUTOA through a fire wall, what are the requirements?
a. | Cut a hole just big enough for the
cable | c. | Cut a 3” hole and fire caulk
| b. | Cut a 2” hole and fire
caulk | d. | Check the requirements for that rated
wall
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6.
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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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7.
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What are CRT’s?
a. | Type of
horn | c. | Type of magnetic
switch | b. | Type of siren | d. | Type of monitor |
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8.
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What type of cable would you
typically terminate on a 110 block?
a. | CAT 3
4pr | c. | CAT 6
4pr | b. | CAT 5 4pr | d. | none of these |
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9.
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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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10.
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Adjusting a room acoustically,
you would use ______ noise.
a. | Pink | c. | Music | b. | White | d. | intermittent |
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11.
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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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12.
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Measurement of AC resistance is
called?
a. | Ohms | c. | Impedance | b. | Mhos | d. | None of the above |
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13.
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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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14.
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What does the acronym
“SPL” stand for?
a. | special people
lately | c. | sound pressure
level | b. | spectacular project latencies | d. | step level |
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15.
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There are ________ pairs in
each binder group of a multi-pair UTP backbone cable
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16.
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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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17.
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Category 5 cables exhibit
________ attenuation than category 3 cables.
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18.
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The nominal voltage supplied
from the telephone company on public telephone lines(except during ringing) is
________.
a. | 24 VDC | c. | 120 VAC | b. | 48 VDC | d. | 48 VAC |
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19.
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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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20.
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Type ____ communications plenum
cable shall be listed as being suitable for use in ducts, plenums, and other spaces used for
environmental air and shall also be listed as having fire-resistant and low smoke-producing
characteristics.
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21.
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A ______ modular jack contains
connection points for two telephone pairs.
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22.
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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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23.
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When working on ladders, you
should not extend your body beyond the rails, this is commonly called:
a. | the “ladder”
rule | c. | the “arm’s length”
rule | b. | the “belt buckle” rule | d. | the “lean-out” rule |
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24.
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The NEC definition of
“cable” is:
a. | A covering over the conductor
assembly that may include one or more metallic members, strength members or
jackets | c. | A wire with more
than one pair in a jacket | b. | A factory assembly of two or more conductors having an overall
covering |
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25.
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In a typical burglar alarm
system, a door contact is configured as:
a. | Normally
open | c. | Shunted | b. | Normally closed | d. | Bipolar |
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26.
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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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27.
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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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28.
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A transformer that has more
turns in the secondary than in the primary:
a. | steps-up
voltage | c. | steps-down
voltage | b. | steps-up current | d. | steps-down power |
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29.
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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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30.
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What is the proper way to
ascend and descend a ladder?
a. | facing
away | c. | facing
towards | b. | carrying material | d. | both b & c |
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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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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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33.
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A series of digits or
characters that must be entered into a system such as a telephone or other communication terminal to
gain access, is known as______?
a. | prefix | c. | pin number | b. | codec | d. | access code |
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34.
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What type of lens would be used
with a pan & tilt mount to follow individual cars as well as cover a large parking
lot?
a. | motorized zoom auto
iris | c. | vari-focal manual
iris | b. | narrow angle manual iris | d. | wide angle auto iris |
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35.
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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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36.
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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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37.
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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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38.
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The “dB” describes
________.
a. | a ratio of two
quantities | c. | power of a
quotient | b. | an exponent | d. | the sum of two numbers |
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39.
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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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40.
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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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41.
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What is the best way to protect
against voltage spikes in a DC circuit?
a. | add a capacitor across the
contacts | c. | use an in-line
fuse on the common wire of the contact | b. | add a diode across the relay coil | d. | use an isolation transformer |
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42.
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Which of the following best
describes the main reason for connecting computers together?
a. | to reduce the amount of software
needed | c. | to share
resources | b. | to save overhead costs | d. | both a and b |
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43.
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UTP cable is susceptible to
________.
a. | electrical
noise | c. | radiation | b. | massive voltage drop | d. | shielding |
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44.
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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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45.
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The maximum recommend length
for a single-section ladder is ______ feet.
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46.
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A good rule of thumb for
cleaning connectors is that they be cleaned _________.
a. | weekly | c. | every two years | b. | every time they are exposed to the
environment | d. | none of
these |
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47.
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Which of the following items
should not be transported on a
material hoist
a. | personnel | c. | powered equipment | b. | wheeled loads | d. | long material |
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48.
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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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49.
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The temperature rating
associated with the ampacity of a conductor shall be selected and coordinated so as not to exceed the
___________ temperature rating of any connected termination, conductor or
device.
a. | base | c. | highest | b. | compensated | d. | lowest |
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50.
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Which article in the National
Electrical Code would you reference to find the DEFINITION for a signaling circuit?
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