C7 test

Question 1

The grounding conductor for a community antenna TV( CATV or cable) system must be no smaller that_______ solid stranded copper or other corrosion resistance conductive material.

Answer 1

No 14

Question 2

CATV grounding conductor

Answer 2

the grounding of the electrode system of the building or structure

Question 3

indoor antennas and indoor lar-ins must be run no closer than____to conductors of other wiring systems in the premises

Answer 3

2 inches

Question 4

lead-in conductors on the outside of a building must be run so they can swing no closer than blank to the conductors of circuits of 250 volts or less

Answer 4

2 feet

Question 5

lead-in conductors on the outside of a building must be run so they can swing no closer than blank to the conductors of circuits of more than 250 volts

Answer 5

10 feet

Question 6

outdoor antennnas and lead in conductors must not cross over open light or power conductors. When closeness to such conductors (less thatn 250 V) cannont be avoided, the NEC requires that the clearance must be a least

Answer 6

2 feet

Question 7

the correct sequence that a satellite signal follows a dish antenna is

Answer 7

feedhorn, low-noise amplifier, downconverter, receiver, television set

Question 8

the downconverter in a satelite antenda system passes on the signal to the

Answer 8

receiver

Question 9

the downconverter

Answer 9

converts signals from high frequency to low frequency

Question 10

while trenching near an underground CATV cable, you inadvertently damage the cable. you should immedialty contact the cable company becuase

Answer 10

radiating signals from the damaged cable can inerfere with aircraft transmissions

Question 11

in four-wire telephone cable, the wire colors are usually

Answer 11

black,green, red and yellow

Question 12

in a four wire telephone cable, the red and green wires carry

Answer 12

the message, 48 v dc and 85 v ac signals

Question 13

in a four-wire telphone cable, the yellow wire

Answer 13

can be used as a ground wire

Question 14

which two wires are sometime used as a second line

Answer 14

yellow and black

Question 15

in the primary wiring pair, which is the ring wire

Answer 15

green

Question 16

in the primary wiring pair, which is the ring wire

Answer 16

red

Question 17

in six-wire telephone cable, what are the additional two colors

Answer 17

white and blue

Question 18

in the six wire telephone cable, what are the white and blue wires used for

Answer 18

functions such as speakerphones, dialers, background music, and security signals

Question 19

no more than how many phones can be installed without overloading the incoming phone circuit

Answer 19

5

Question 20

the point whre the phone company wiring ends and the owners interior wiring begins is called the

Answer 20

demarcation point

Question 21

the most common interior phone wiring for a new home is

Answer 21

4 conductor no. 22 or 24

Question 22

the recommended circuit length for number 22 phone cable is no more than

Answer 22

200 feet

Question 23

phone jacks should be installed more than how many feet enter the home

Answer 23

200 feet

Question 24

phone conductors should be kept how many feet from electrical branch-circuit wiring if the phone cable is run parallel to the branch circuit wiring,

Answer 24

12 inches

Question 25

how far up should an intecom system be installed from the finished floor for the greatest operating

Answer 25

4 1/2 feet

Question 26

the intercom system master station should be located at least how far from an adjacent wall, cabinets, or counters

Answer 26

4 inches

Question 27

The standard installation height for inside phone jacks is

Answer 27

36"

Question 28

which cable may not be run in the same cable

Answer 28

Class 1 circuits

Question 29

the following conductors can't be placed in any raceways, compartments, outlet box, junction box, or similar fitting with the conduction of

Answer 29

electric light circuit, electric power circuits, class one circuits

Question 30

is a doorbell doesn't work, the most likely source of failure is the

Answer 30

bell button

Question 31

if you get 0 volts if a doorbell fails you conclude that the transformer is defective.

Answer 31

true

Question 32

smoke detectors are powered by the following

Answer 32

black and white pigtails for direct connection to a 120 v line. a cord and plug connected to a standard receptacle and battery

Question 33

which locations are best for a smoke detector

Answer 33

on the ceiling

Question 34

the proper location for a heat or smoke detector installed in a room is

Answer 34

as close as possible to the center of the room

Question 35

standard smoke detectors must be installed

Answer 35

outside each bedroom in each addional story in basements

Question 36

in an unfinished attic, install a smoke detector

Answer 36

on the bottom edge of a rafter or joist

Question 37

smoke detectors installed in a basement must be located

Answer 37

close to the starway leading to the floor above

Question 38

smoke detectors in rooms with ceiling slopes greater than how many feet should a detector be located

Answer 38

1 foot rise to 8 foot run

Question 39

in a residential stairway install a smoke detector

Answer 39

at the top of any open stairway

Question 40

installed on a ceiling a heat or smoke detector edge must be installed no less than how far from a wall

Answer 40

4 inches

Question 41

if a smoke detector is installed on a wall the top edge must be installed how far from less than from the ceiling

Answer 41

4 inches

Question 42

if the smoke detector is installed on the wall the tip edge must be installed no more than how far from the ceiling

Answer 42

12 inches

Question 43

install a smoke detectror how far from a flouresenct light fixtures

Answer 43

6 feet

Question 44

never install a smoke detector in the following locations

Answer 44

garage kitchen near the stove bathroom with a shower

Question 45

the wiring of a smoke detector in new construction is usually done

Answer 45

in parallel

Question 46

the wiring of a security system usually consists of

Answer 46

multiconductor cables made up of no 18 AWG

Question 47

the installation of security system wiring should be done

Answer 47

after standard house wiring is installed

Question 48

the wiring of door entry, glass-break, floor matt, and window-foil detectors is usually done

Answer 48

in series

Question 49

the wiring of alarms, horns and other signaling devices is usually done

Answer 49

in parallel

Question 50

The supply source for a class 1 power-limited circuit has a rated output of no more than

Answer 50

30 volts and 1000 volt-amperes

Question 51

The supply source for a class 2 or Class 3 power-limited circuit has a rated output of no more than

Answer 51

30 volts and 100 volt-amperes

Question 52

when installing the low voltage cable in a remote control system, run the cable from the transformer to

Answer 52

the relay (blue-colored conductor) each switch postion( red and black conductor)

Question 53

the purpose of a master selector switch in a residential installation of a remote control system is

Answer 53

to activate or deactivate any of the low-voltage switches at remote locations

Question 54

the lead of the three low-voltage wires is common to both the off-coil and the on the coil

Answer 54

Blue

Question 55

the low voltage relay of a romote control system of the three low voltage wires connect internally to the on coil

Answer 55

red

Question 56

the low voltage relay of a romote control system of the three low voltage wires connect internally to the off coil

Answer 56

black

Question 57

what is the purpose of a thermal breaker in a low voltage remote control system

Answer 57

to open the primary circuit and protect the transformer for overheating

Question 58

low voltage remote control system use what type of conductors

Answer 58

No 18

Question 59

when are you likely to be reqired to get a building permit for outdoor wiring

Answer 59

for the GFCI recpticles that recieves a transformer

Question 60

you are installing a 12 V outdoor lighting system, but 120 v circuits operate a part of the 12 v system, and a GFCI must be installed. What should you do

Answer 60

check with the building inspector to see if you need a permit and check the local codes to see if they have any requirements for low voltage system installation

Question 61

a contractor is installing outdoor lighting for a lawn by running cable in a trench. If a concrete walkway is encountered, the preferred option is to

Answer 61

run the cable through a sleeve of pipe under the walkway

Question 62

the most likely source for failure in a low voltage circuit is

Answer 62

switch

Question 63

type CM (communication cable) need not be installed in a one or two-family dwelling if the following is used instead

Answer 63

Type CMX less than 1/3 in diameter

Question 64

why do hacksaw teeth face forward

Answer 64

you cut on the down-stroke

Question 65

what should you do first when testing a transformer with a megger

Answer 65

make sure that the switches or circuits of both sides are open

Question 66

a master selector switch is best described a

Answer 66

many swiches on one panel

Question 67

what part of a satelite system changes the frequency of signals

Answer 67

downlink converter

Question 68

the proper procedure when using a stepladder is

Answer 68

make sure the locks are engages

Question 69

in the primary wiring pair of a telephone system, whis is the postitive conductor

Answer 69

Green

Question 70

in the primary wiring pair of a telephone system which is the negative conductor

Answer 70

Red

Question 71

You are testing a phone system after the installation. You hear a dial tone and dial a number. You continue to hear a dial tone. What is the problem

Answer 71

the red and green wires were reveresed

Question 72

WATS stand for

Answer 72

Wide area telephone service

Question 73

the bottom of an outlet for a wall phone is typically insalled

Answer 73

56 " above the floor

Question 74

equipment with exposed parts charge with over 50 volts must be

Answer 74

fenced off

Question 75

For a 24 volt circuit what is the allowable ampacity for a standed AWG N0 16 conductor

Answer 75

18 amps

Question 76

what type of function reads from right to left on a meter

Answer 76

resistance

Question 77

what is the most econmical way to dig a short trench

Answer 77

a trencher

Question 78

if you have installed a string of 12 v outdoor lights and they dim toward the end of the string, what is the most likely cause of the dimming

Answer 78

voltage drop

Question 79

if you have installed a string of 12 V outdoor lights and one of the fixtures is extinquised what is the most likley cause

Answer 79

faulty lamp

Question 80

if a workers are exposed to cuts, burns or corrosed or irritating substances, the employer must provide

Answer 80

hand protection

Question 81

employees exposed to flying or falling objects and/or electric shock or electric burns must wear

Answer 81

head protection

Question 82

at a construction site hard hand must me worn

Answer 82

by everyone

Question 83

what is the amount of Asbesotos that need to be reported by dosh if it is found in Dust

Answer 83

0.1%

Question 84

Asbestos at a jobsite should be handled

Answer 84

Wet

Question 85

CAL/OSHA inspectors will arrive at you office or jobsite

Answer 85

without an appoitment

Question 86

Which of the following is not a type of CAL/Osha citation

Answer 86

Judical

Question 87

in which of the following is a GFCI required by the NEC

Answer 87

Bathroom

Question 88

all 124-volt single phase and 20 amp receptacles installed with how many feet of a residential kitchen sink and servicing a countertop be equipped with a GFCI

Answer 88

6 feet

Question 89

What needs to be on every Jobsite

Answer 89

First Aid kits