C7 Low Voltage Systems - Test #2

Question 1

Which of the following is used for horizontal cabling:

STP-A
CAT 5
F.O.
all of the above

Answer 1

all of the above

Question 2

Prior to digging excavations or trenches, the location of the underground utilities should be determined and given to the owner _____ hours in advance.

24
36
48
60

Answer 2

48

Question 3

One should never try to put out an electrical fire with water because:

wire damage may be caused.
the water will become too hot.
the water may transmit shock to the user.
steam may be caused.

Answer 3

the water may transmit shock to the user.

Question 4

The main electrical service switch on a building should be rated for not less than:

the total load to be carried.
1-1/4 times the total load.
1-1/2 times the total load.
2 times the total load.

Answer 4

the total load to be carried.

Question 5

The net cost of materials is $1712.01. The tax rate is 8.25 percent. What is the final cost?

$1,853.25
$1,412.40
$2,100.00
$141.24

Answer 5

$1,853.25

Question 6

If you have to use artificial respiration on an injured person and you choose the back pressure arm lift (Hoger-Nielson method), what position should the victim first be placed?

Face down
On the left side
On the right side
On the victim’s back

Answer 6

Face down

Question 7

Ladders serving platforms shall extend above the platform:

2 feet.
2 feet 6 inches.
3 feet.
4 feet.

Answer 7

3 feet

Question 8

Specifications of the manufacturer regarding design, erection, operation and safety must be available at the job site. All cranes exceeding ____ ton capacity need to be certified how often?

15 – monthly for tower cranes
10 – monthly for tower cranes
5 – annually for tower cranes
3 – annually for tower cranes

Answer 8

3 – annually for tower cranes

Question 9

For grounding a patch panel cable rack, what is the minimum size wire required?

16 AWG
6 AWG
14 AWG

Answer 9

14 AWG

Question 10

Class-1 circuits may not be run in the same cable with communication circuits, according to the NEC.

True
False

Answer 10

True

Question 11

In order to avoid injuries it is proper to lift heavy objects:

with the knees bent and the back held stiff.
with both the knees and the back held stiff.
using the arms only.
in the manner best suited to the individual doing the lifting.

Answer 11

with the knees bent and the back held stiff.

Question 12

On a scale of 1/4″ = 1′, a line 15″ long would represent how many feet?

30
45
50
60

Answer 12

60

Question 13

Statistics show that the _____ industry had by far the highest rate of disabling accidents of any industry in the State.

automobile
coal mining
construction
air traffic

Answer 13

construction

Question 14

The 25th pair in a 25-pair cable is violet/slate.

True
False

Answer 14

True

Question 15

In addition to the Code of Safe Practices issued by the Division of Industrial Safety, the employer must also add to this list the Safe Practices that apply to the job he is working on.

TRUE
FALSE

Answer 15

True

Question 16

The three basic ladders used in construction are:

platform, step and extension.
step, roller and extension.
step, extension and straight.
extension, straight and platform.

Answer 16

step, extension and straight.

Question 17

The best descriptions of materials and procedures can be found in the:

plans.
drawings.
specifications.
contract.

Answer 17

specifications

Question 18

Platforms or floors of such suspended scaffolds shall not be less than ____ inches in width and shall be free from knots or cracks.

12
14
16
18

Answer 18

14

Question 19

Mr. Able is working on a 6′ x 2.5′ metal rolling scaffold that is five feet high. It has 6″ rubber wheels and the floor has a 5 degree pitch. Mr. Able is finished at this location and needs to move to a different area. Mr. Able instructs his partner to move the scaffold to a different location while he is still on it. He has proceeded:

correctly.
incorrectly; the size of the scaffold does not allow for movement of the scaffold with workers on it.
incorrectly; the pitch of the floor surface does not allow for movement of the scaffold with workers on it.
incorrectly; there is never a time when the movement of a scaffold with workers on the platform is allowable.

Answer 19

incorrectly; the pitch of the floor surface does not allow for movement of the scaffold with workers on it.

Question 20

What are the direct costs for a job if the material costs are $82,145, the labor costs are $42,562 and the overhead is $49,883?

$92,445
$132,028
$49,883
$124,707

Answer 20

$124,707

Question 21

The safety lines provided for people working on swinging scaffolds shall be at least ____ manila rope.

1/4″
1/2″
5/8″
3/4″

Answer 21

5/8”

Question 22

Safety Data Sheets or (SDS) also known as (MSDS) describe:

the nature of the chemical.
the symptons of over exposure.
the precautions.
all of the above.

Answer 22

all of the above

Question 23

Which of the following prefixes indicates one thousandth in the metric system?

Deci
Centi
Milli
Kilo

Answer 23

Kilo

Question 24

Mr. Able is working on a 8′ x 2.5′ metal rolling scaffold that is six feet high. It has 6″ rubber wheels and the floor has a 2 degree pitch. Mr. Able is finished at this location and needs to move to a different area. Mr. Able instructs his partner to move the scaffold to a different location while he is still on it. He has proceeded:

correctly.
incorrectly; the size of the scaffold does not allow for movement of the scaffold with workers on it.
incorrectly; the pitch of the floor surface does not allow for movement of the scaffold with workers on it.
incorrectly; there is never a time when the movement of a scaffold with workers on the platform is allowable.

Answer 24

correctly

Question 25

The power factor can be determined by the use of which combination of the following meters?

Ammeter, voltmeter & phase rotation meter
Ammeter, ohmmeter & phase rotation meter
Ammeter, wattmeter & voltmeter
Wattmeter, ohmmeter & voltmeter

Answer 25

Ammeter, wattmeter & voltmeter

Question 26

What is the maximum output for a 20 amp circuit?

1200 watts
1800 watts
2000 watts
2400 watts

Answer 26

2400 watts

Question 27

The maximum length for a fall protection harness is____ feet.

6 ft
5 ft
2 ft

Answer 27

6 ft

Question 28

The best practice for splicing singlemode fiber is

mechanical alignment sleeve with index matching gel
wire nut
fusion splice with strain relief boot

Answer 28

fusion splice with strain relief boot

Question 29

What is the maximum height of a stepladder?

15 ft.
20 ft.
25 ft.
30 ft.

Answer 29

20 ft

Question 30

The ____________ has the responsibility of providing all required dimensions for the plans.

owner
builder
architect
contractor

Answer 30

architect

Question 31

The most commonly used scale in house construction is:

1/8″ = 1′.
1/4″ = 1′.
1/2″ = 1′.
3/4″ = 1′.

Answer 31

1/4″ = 1′.

Question 32

To reduce voltage from 120 V to 24 V a __________ is used.

step-down transformer
step-up transformer
inducer
transducer

Answer 32

step-down transformer

Question 33

The working platform of a light trade wooden pole scaffold shall be a minimum of:

20 inches in width.
25 inches in width.
30 inches in width.
36 inches in width.

Answer 33

20 inches in width.

Question 34

The minimum bending radius of conduits 1 inch and larger is

8 times the diameter
4 times the diameter
12 times the diameter
6 times the diameter

Answer 34

6 times the diameter

Question 35

The ratio of total liabilities to net worth compares the amount invested in a business by creditors with the amount invested by:

stockbrokers.
owners.
A or B.
none of the above.

Answer 35

A or B.

Question 36

Only No. _____ (or larger) type ____ flexible cord can be spliced.

12 – S
14 – O
12 – O
10 – THW

Answer 36

12 – S

Question 37

The electric meter NOT in itself capable of measuring both D.C. and A.C. voltages is the:

Darsonval voltmeter.
electrodynamometer voltmeter.
iron vane voltmeter.
inclined-coil voltmeter.

Answer 37

Darsonval voltmeter.

Question 38

What is the maximum height of a steel cleat ladder?

15 ft
20 ft
25 ft
30 ft

Answer 38

30 ft

Question 39

What percentage of 86 is 21?

18 percent
0.24
32 percent
43 percent

Answer 39

.24

Question 40

Special certification is required for any asbestos-related work involving ____ sq. ft. or more of asbestos-containing materials.

150
100
75
50

Answer 40

100

Question 41

Physical hazards are:

noise.
vibration and temperature extremes.
radiation.
All of the above

Answer 41

all of the above

Question 42

In order to insure that the workers do their jobs safely the employer, by law, must provide the following:

training and information for the worker to do the job safely.
abide by the laws regulating the use of chemicals.
Material Safety Data Sheets (MSDS) for the potentially harmful chemicals.
All of the above

Answer 42

all of the above

Question 43

Electromagnetic interference (EMI) should be considered when running low voltage wiring.

True
False

Answer 43

True

Question 44

Title ____ of the California Administration Code contains the energy conservation standards for new residential buildings.

20
22
24
30

Answer 44

24

Question 45

The maximum height of an extension ladder is:

36 ft.
40 ft.
42 ft.
44 ft.

Answer 45

44 ft

Question 46

On a scale of 1/4″ -1′, 9″ would be represented by what fraction of an inch?

1/8
3/16
1/4
5/16

Answer 46

3/16

Question 47

The smallest speaker is the tweeter

True
False

Answer 47

True

Question 48

What is the red connector used for when connecting audio cables?

center audio
left audio
video
right audio

Answer 48

right audio

Question 49

Which of the following two items would most likely shock you if you touched them simultaneously?

Black and white wires
White and green wires
Black pipe and green wire
White wire and black pipe

Answer 49

Black and white wires

Question 50

Amps are most dangerous for an electric shock.

True
False

Answer 50

True

Question 51

1/4” scale equals

1’ = 4”
4’ = 1”
none of the above

Answer 51

4’ = 1”

Question 52

Toe guards are required on all scaffolds:

over 4 ft. high.
over 6 ft. high.
over 10 ft. high.
if workers work or pass below.

Answer 52

if workers work or pass below.

Question 53

On suspension (swing) scaffolds, the width of platform must be no less than __________ no more than ___________.

12″; 24″
14″; 36″
16″; 32″
18″; 30″

Answer 53

14″; 36″

Question 54

What does the term “scope of the work” indicate?

Specific instructions concerning the type of materials to be used
What work the contractor is specifically responsible for completing
Information contained in specifications
A contract stating the length of time allocated for constructing the building

Answer 54

What work the contractor is specifically responsible for completing

Question 55

Vehicles used to haul construction material with body capacities of ____ cu. yds. or more must be equipped with an automatic backup alarm.

2
2.5
3
4.5

Answer 55

2.5

Question 56

Which light bulb gives off the truest color?

Mercury vapor
Fluorescent
Incandescent
Quartz halogen

Answer 56

Quartz halogen

Question 57

The acronym for Wide Area Telephone Service is WATS.

True
False

Answer 57

True

Question 58

The minimum clear width of an exit opening to meet handicapped codes is:

30″.
32″.
36″.
40″.

Answer 58

32”

Question 59

The State’s Occupational Safety and Health Act must be as strict or stricter than the Federal’s.

True
False

Answer 59

True

Question 60

Temporary power at a job site should be protected by a GFCI.

True
False

Answer 60

True

Question 61

On a scale of 1/8″ = 1′, if a rectangle is drawn 8-1/2″ wide x 10-1/4″ long, what is the actual length and width?

64′ x 80′
85′ x 102′
34′ x 41′
68′ x 82′

Answer 61

68′ x 82′

Question 62

If you, as a contractor, are working on a building that was built prior to 1975, you should:

obtain a permit to remove any asbestos.
check to see if asbestos is on the site.
check with the owner to see if there are any records which would indicate that asbestos is present.
check with Cal/OSHA prior to commencing work.

Answer 62

check with the owner to see if there are any records which would indicate that asbestos is present.

Question 63

The minimum bending radius for fiber optic cables is

20 times the cable diameter
10 times the cable diameter
40 times the cable diameter

Answer 63

20 times the cable diameter

Question 64

Before entering a confined space which of the following should you do:

test the air inside the area
test the air outside the area
put in a fan
All of the above

Answer 64

test the air inside the area