C7 Low Voltage Systems - Test #2 Flashcards
Which of the following is used for horizontal cabling:
STP-A
CAT 5
F.O.
all of the above
all of the above
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
48
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.
the water may transmit shock to the user.
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.
the total load to be carried.
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
$1,853.25
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
Face down
Ladders serving platforms shall extend above the platform:
2 feet.
2 feet 6 inches.
3 feet.
4 feet.
3 feet
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
3 – annually for tower cranes
For grounding a patch panel cable rack, what is the minimum size wire required?
16 AWG
6 AWG
14 AWG
14 AWG
Class-1 circuits may not be run in the same cable with communication circuits, according to the NEC.
True
False
True
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.
with the knees bent and the back held stiff.
On a scale of 1/4″ = 1′, a line 15″ long would represent how many feet?
30
45
50
60
60
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
construction
The 25th pair in a 25-pair cable is violet/slate.
True
False
True
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
True
The three basic ladders used in construction are:
platform, step and extension.
step, roller and extension.
step, extension and straight.
extension, straight and platform.
step, extension and straight.
The best descriptions of materials and procedures can be found in the:
plans.
drawings.
specifications.
contract.
specifications
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
14
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.
incorrectly; the pitch of the floor surface does not allow for movement of the scaffold with workers on it.
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
$124,707
The safety lines provided for people working on swinging scaffolds shall be at least ____ manila rope.
1/4″
1/2″
5/8″
3/4″
5/8”
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.
all of the above
Which of the following prefixes indicates one thousandth in the metric system?
Deci
Centi
Milli
Kilo
Kilo
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.
correctly
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
Ammeter, wattmeter & voltmeter
What is the maximum output for a 20 amp circuit?
1200 watts
1800 watts
2000 watts
2400 watts
2400 watts
The maximum length for a fall protection harness is____ feet.
6 ft
5 ft
2 ft
6 ft
The best practice for splicing singlemode fiber is
mechanical alignment sleeve with index matching gel
wire nut
fusion splice with strain relief boot
fusion splice with strain relief boot
What is the maximum height of a stepladder?
15 ft.
20 ft.
25 ft.
30 ft.
20 ft
The ____________ has the responsibility of providing all required dimensions for the plans.
owner
builder
architect
contractor
architect
The most commonly used scale in house construction is:
1/8″ = 1′.
1/4″ = 1′.
1/2″ = 1′.
3/4″ = 1′.
1/4″ = 1′.
To reduce voltage from 120 V to 24 V a __________ is used.
step-down transformer
step-up transformer
inducer
transducer
step-down transformer
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.
20 inches in width.
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
6 times the diameter
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.
A or B.
Only No. _____ (or larger) type ____ flexible cord can be spliced.
12 – S
14 – O
12 – O
10 – THW
12 – S
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.
Darsonval voltmeter.
What is the maximum height of a steel cleat ladder?
15 ft
20 ft
25 ft
30 ft
30 ft
What percentage of 86 is 21?
18 percent
0.24
32 percent
43 percent
.24
Special certification is required for any asbestos-related work involving ____ sq. ft. or more of asbestos-containing materials.
150
100
75
50
100
Physical hazards are:
noise.
vibration and temperature extremes.
radiation.
All of the above
all of the above
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
all of the above
Electromagnetic interference (EMI) should be considered when running low voltage wiring.
True
False
True
Title ____ of the California Administration Code contains the energy conservation standards for new residential buildings.
20
22
24
30
24
The maximum height of an extension ladder is:
36 ft.
40 ft.
42 ft.
44 ft.
44 ft
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
3/16
The smallest speaker is the tweeter
True
False
True
What is the red connector used for when connecting audio cables?
center audio
left audio
video
right audio
right audio
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
Black and white wires
Amps are most dangerous for an electric shock.
True
False
True
1/4” scale equals
1’ = 4”
4’ = 1”
none of the above
4’ = 1”
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.
if workers work or pass below.
On suspension (swing) scaffolds, the width of platform must be no less than __________ no more than ___________.
12″; 24″
14″; 36″
16″; 32″
18″; 30″
14″; 36″
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
What work the contractor is specifically responsible for completing
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
2.5
Which light bulb gives off the truest color?
Mercury vapor
Fluorescent
Incandescent
Quartz halogen
Quartz halogen
The acronym for Wide Area Telephone Service is WATS.
True
False
True
The minimum clear width of an exit opening to meet handicapped codes is:
30″.
32″.
36″.
40″.
32”
The State’s Occupational Safety and Health Act must be as strict or stricter than the Federal’s.
True
False
True
Temporary power at a job site should be protected by a GFCI.
True
False
True
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′
68′ x 82′
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.
check with the owner to see if there are any records which would indicate that asbestos is present.
The minimum bending radius for fiber optic cables is
20 times the cable diameter
10 times the cable diameter
40 times the cable diameter
20 times the cable diameter
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
test the air inside the area
