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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Which test instrument would you
use to test long distance fiber for reflective and non-reflective events?
a. | Optical laser continuity
check | c. | OTDR | b. | Power Meter | d. | LED continuity check |
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3.
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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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4.
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What is a Fusion splicer used
for?
a. | Fiber
splicing | c. | Coax
splicing | b. | Copper Data splicing | d. | none of these |
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5.
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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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6.
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What is the typical AWG size
for a series 6 center conductor?
a. | 18 AWG | c. | 22 AWG | b. | 16 AWG | d. | 14 AWG |
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7.
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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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8.
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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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9.
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What is the unit of measurement
when measuring attenuation loss/gain in a coaxial system?
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10.
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What does EOL stand
for?
a. | End Of
Line | c. | Error on Line
Set | b. | Error on Line | d. | Both a & c |
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11.
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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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12.
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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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13.
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Adjusting a room acoustically,
you would use ______ noise.
a. | Pink | c. | Music | b. | White | d. | intermittent |
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14.
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What is the 1st step when
certifying a data link?
a. | Calculate wire
length | c. | Wire
map | b. | Determine wire type | d. | Calibrate testers |
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15.
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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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16.
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There are ________ pairs in
each binder group of a multi-pair UTP backbone cable
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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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A ______ modular jack contains
connection points for two telephone pairs.
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19.
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Proper respirator fit may be
prevented by:
a. | A person’s physical face
structure | c. | Excessive facial
hair | b. | Glasses with temple pieces | d. | All the above |
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20.
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What is the best way to control
excessive bleeding?
a. | By running it under
water | c. | Direct pressure on the
wound | b. | With a loose bandage | d. | Wait to see if it stops |
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21.
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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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22.
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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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23.
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OSHA requirements for a job
site do not
include:
a. | Coffee and donuts at break
time | c. | Store flammable rags in containers
that have lids | b. | Immediately report unsafe conditions and
accidents | d. | Cleanup construction debris and
scrap regularly |
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24.
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A series circuit always has
______ current path(s).
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25.
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The _______ pattern is the
preferred layout for a paging system.
a. | square | c. | diamond | b. | staggered | d. | side by side |
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26.
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Loose tube type fiber cable is:
a. | Usually used
outside | c. | May require a
“break out kit” | b. | Made to allow for expansion and contraction as temperatures
change | d. | All of these |
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27.
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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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28.
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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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29.
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Openings in floors should
be:
a. | guarded | c. | guarded or covered | b. | covered | d. | none of these |
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30.
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Choose the correct components
of a magnetic lock.
a. | key,
tumbler | c. | coil,
plunger | b. | electromagnet, strike plate | d. | doorknob, deadbolt |
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31.
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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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32.
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To increase the field of view
of a CCTV camera, a _________ is used.
a. | telephoto
lens | c. | short focal
length | b. | infrared lens | d. | none of these |
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33.
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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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34.
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What does OTDR stand
for?
a. | oral tooth decay
rate | c. | option technical Doppler
rate | b. | optical time domain reflectometer | d. | None of these |
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35.
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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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36.
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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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37.
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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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38.
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What is the minimum voice
cabling type for a residential application?
a. | 4-pair, Category
2 | c. | 4-pair, Category
5 | b. | 4-pair, Category
3 | d. | 4-wire, station
wire |
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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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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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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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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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_______ are the most common
shock-related injury.
a. | Amputations | c. | Burns | b. | Broken bones | d. | Falls |
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45.
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________ and _______ are the
two types of delay measured in a cable test.
a. | Delay skew/
NVP | c. | Propagation delay/ Delay
skew | b. | NVP/ return loss | d. | Propagation delay/ NVP |
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46.
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A force that pushes electrons
through a circuit is called _________.
a. | resistance | c. | power | b. | current | d. | voltage |
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47.
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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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48.
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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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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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