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(c-51) Structural Steel > Health And Safety Test 1 > Flashcards

Health And Safety Test 1 Flashcards

1
Q

Which of the following is safest when you are finished with a power tool?

A. clean the tool

B. warn coworkers that you have just used it

C. post a notice on the machine

D. wait until all motion has stopped before leaving the machine

A

D. wait until all motion has stopped before leaving the machine

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2
Q

What do you do with materials when you are done with them?

A. cover them with a tarp

B. put them aside

C. keep them close by in case you need them again

D. move items out of the way to keep the area clean, uncluttered, and safe

A

D. move items out of the way to keep the area clean, uncluttered, and safe

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3
Q

Where should you keep the brooms and shovels on a jobsite?

A locked in the fammable materials cabinet

B. off the jobsite

C. in a place safe to get to

D. where the customer wants them

A

C. in a place safe to get to

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4
Q

A back-up warning device is required on a vehicle with a body capacity of at least:

A. 1/2 cubic yards

B. 2-1/2 cubic yards

C. 3 cubic yards

D. 5 cubic yards

A

B. 2-1/2 cubic yards

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5
Q

You have finished a job and must transport a cement mixer 20 miles. Which of the following should you do after hitching the trailer to your truck?

A. clean the mixer

B. put gas in the mixer

C. check the air in the tires

D. attach the safety chains

A

D. attach the safety chains

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6
Q

When is foot protection required?

A. when you must walk over 800 feet

B. when you are walking on rock

C. when you are walking on a metal roof

D. when there is a danger of objects falling on your feet

A

D. when there is a danger of objects falling on your feet

Foot protection is required when there is a danger of objects falling on the worker’s feet or when there is a danger of a crushing or penetrating type of injury. Foot protection is also required for employees who work in abnormally wet conditions or where there are hot or corrosive substances present.

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7
Q

What should you do FIRST if a gas line is accidentally severed while you are doing excavation work?

A. call 911

B. evacuate the area

C. call the utility company

D. turn off equipment

A

B. evacuate the area

Equipment should be left as-is. If it is running do NOT turn it off; just evacuate the area. The next thing to do is call 911, and then call the utility company.

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8
Q

How many rungs of a ladder must extend above the supporting edge of a roof?

A. 2 rungs

B. 3 rungs

C. 4 rungs

D. 5 rungs

A

B. 3 rungs

Ladders must overlap the top support by at least 3 feet, and the rungs on a ladder are spaced 1 foot apart.

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9
Q

On a step ladder which step is the highest you would stand on?

A. 1st highest

B. 2nd highest

C. 3rd highest

D. 4th highest

A

B. 2nd highest

The highest step you should stand on is the highest second step, the top of a step ladder is not a step, For straight or extension ladders is the 3rd or 4th rung from the top.

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10
Q

If a piece of heavy equipment broke down, what would be the least practical way of fixing it?

A. block the wheels

B. put it in gear

C. stop the motor

D. lower the equipment

A

D. lower the equipment

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11
Q

When does Cal/OSHA require new employees to be trained?

A. at the time of being hired

B. on the job

C. prior to entering the jobsite

D. after an accident

A

A. at the time of being hired

The Construction Safety Orders require employers to give instructions regarding the hazards and safety precautions applicable to the type of work in question when the workers are first employed.

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12
Q

What is the minimum plank width for a ladder-jack scaffold?

A. 14 inches

B. 16 inches

C. 18 inches

D. 20 inches

A

A. 14 inches

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13
Q

What color tag does Cal/OSHA place on a piece of equipment that is unsafe and needs repair?

A. red

B. orange

C. blue

D. purple

A

A. red

A YELLOW tag may be issued by a Call
OSHA compliance officer to completely shut down a job. If the State does not offer yellow as an answer, the choice is red.

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14
Q

Who does NOT have to keep Cal/OSHA records of injuries and illnesses?

A. employers with 10 or fewer employees

B. employers with 20 or fewer emplovees

C. a family owned and operated enterprise

D. labor unions

A

A. employers with 10 or fewer employees

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15
Q

Extension ladders must overlap at least _____ the working length.

A. 1%

B. 5%

C. 0%

D. 20%

A

C. 0%

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16
Q

Landing platforms must be provided every __________ if a worker must climb to a height greater than 20 feet on a ladder.

A. 10 feet

B. 20 feet

C. 30 feet

D. 40 feet

A

B. 20 feet

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17
Q

A flagger should stand within __________ work area with a(n) _________ flag.

A. 50 feet … 12 inch

B. 50 feet … 18 inch

C. 75 feet … 12 inch

D. 100 feet … 18 inch

A

D. 100 feet … 18 inch

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18
Q

A tar kettle should be filled to no more than _______ of its capacity.

A. 25%

B. 50%

C. 75%

D. 90%

A

C. 75%

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19
Q

Whom should you call for a DOSH permit?

A. the Registrar of Contractors

B. the district office of the Contractor’s
State License Board

C. the building inspector

D. the district or field office of the Division of Occupational Safety and
Health (DOSH)

A

D. the district or field office of the Division of Occupational Safety and
Health (DOSH)

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20
Q

Which safety method is NOT approved by Cal/OSHA on a 5:12 monolithic roof 25 feet high?

A. ropes

B. handrails

C. warning lines and headers

D. eave barriers

A

C. warning lines and headers

Warning lines are allowed for a 4:12 roof, but they are not safe enough for a steeper 5:12 roof.

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21
Q

Intervals (spans) between roof jacks must not be more than:

A. 5 feet

B. 10 feet

C. 15 feet

D. 20 feet

A

B. 10 feet

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22
Q

A roofing jobsite should have fire extinguishers placed:

A. one on the roof and one on the ground

B. one in the building and one on the ground

C. both on the ground

D. both on the roof

A

A. one on the roof and one on the ground

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23
Q

Which type of fire extinguisher must be used near a hot-tar kettle in use on a roofing job?

A. AA

B. BC

C. B

D. A

A

B .BC

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24
Q

If a worker can fall 7-1/2 feet or more, Cal/
OSHA requires:

A. railings

B. periphery cables

C. safety belts or nets

D. any of the above

A

D. any of the above

The most common protection is a guard-rail system

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25
Q

Cal/OSHA would approve of the following practice on a 4:12 roof:

A. using mastic cans to carry hot tar

B. carrying a bucket of hot tar up a ladder

C. filling buckets with hot tar to the lip

D. carrying two buckets at once on the roof

A

D. carrying two buckets at once on the roof

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26
Q

If cables, safety belts, or nets are not provided, a guardrail must be provided for workers on open sides or ends of work areas elevated ___________ or higher.

A. 5 feet

B. 6 feet

C. 7 feet

D. 7-1/2 feet

A

D. 7-1/2 feet

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27
Q

Ladder rungs must be spaced _________ apart and be _________ long.

A. 11 inches … 11 inches

B. 11-1/2 inches … 11-1/2 inches

C. 12 inches … 11-1/2 inches

D. 12 inches … 12 inches

A

C. 12 inches … 11-1/2 inches

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28
Q

What should you use to wash off a toxic chemical burn?

A. water

B. milk

C. soda

D. rubbing alcohol

A

A. water

Cool water is the safest choice, especially since you may not know the nature of the chemical.

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29
Q

The proper technique for lifting heavy loads is to:

A. bend knees and keep back straight

B. bend back and keep knees straight

C. bend knees and back

D. stand straight at all times

A

A. bend knees and keep back straight

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30
Q

There must be at least one toilet for every ______ employees (or portion thereof)
working at a construction jobsite.

A. 10

B. 15

C. 20

D. 25

A

C. 20

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31
Q

An employer must provide a first-aid kit if he or she has _____ or more employees

A. 1

B. 5

C. 20

D. 25

A

A. 1

First-aid kits must be provided at a job site even if there is only one employee.

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32
Q

Every truck with a body capacity of 2-1/2 cubic yards or more—which is used to haul dirt, rock, concrete or other construction material—must be equipped with a warning device that operates automatically while the vehicle is:

A. loading

B. braking

C. backing

D. turning

A

C. backing

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33
Q

When an automatic backup warning device is used, it must normally be audible from a distance of.

A. 50 feet

B. 100 feet

C. 200 feet

D. 300 feet

A

C. 200 feet

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34
Q

Platforms or floors of suspended (swing) scaffolds must be free from knots or fractures impairing their strength and must not be less than _____________ wide.

A. 14 inches

B. 16 inches

C. 18 inches

D. 20 inches

A

A. 14 inches

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35
Q

Safe access to a scaffold platform must be provided for a scaffold over ___________ in height.

A. 3 feet

B. 4 feet

C. 5 feet

D. all platforms

A

D. all platforms

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36
Q

A safety rail of wood or other equally rigid material of adequate strength is required if the working platform of any scaffolding that is swung or suspended from an overhead support is more than:

A. 7-1/2 feet high

B. 12 feet high

C. 14 feet high

D. 16 feet high

A

A. 7-1/2 feet high

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37
Q

The maximum permitted height for a ladder-jack scaffold is:

A. 8 feet

B. 10 feet

C. 12 feet

D. 16 feet

A

D. 16 feet

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38
Q

The minimum width of platforms for light trades is:

A. 18 inches

B. 20 inches

C. 24 inches

D. 36 inches

A

B. 20 inches

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39
Q

The minimum width of platforms for heavy trades such as bricklaying, stonemasonry, stonecutting, or concrete work is:

A. 3 feet

B. 4 feet

C. 5 feet

D. 6 feet

A

B. 4 feet

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40
Q

Permanent or temporary stairways are required in a building:

A. when there are no ladders

B. when there are no elevators

C. when the building is two or more stories in height

D. when the building is three or more stories in height

A

C. when the building is two or more stories in height

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41
Q

Safety devices such as guardrails are required when someone is working on a platform:

A. over 17 feet high

B. over 57 feet high

C. 7-1/2 feet or higher

D. 5 feet or higher

A

C. 7-1/2 feet or higher

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42
Q

A permit from DOSH is required for erection of scaffolds higher than:

A. 12 feet

B. 24 feet

C. 36 feet

D. 48 feet

A

C. 36 feet

Equivalent to three stories.

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43
Q

On a three-story building, what type of device would you use to get to the top?

A. stairway

B. ladder

C. elevator

D. scaffolding

A

A. stairway

Stairways are required on 3-story buildings, but elevators are not.

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44
Q

Unless suitable handholds are provided, the side rails of all ladders used to serve a platform must extend at least the upper landing __________ above.

A. 30 inches

B. 32 inches

C. 34 inches

D. 36 inches

A

D. 36 inches

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45
Q

In a 5-foot deep trench, you must space ladders no more than ___________ apart to enable workers to get out in an emergency.

A. 50 feet

B. 100 feet

C. 150 feet

D. 200 feet

A

A. 50 feet

Ladders are required in trenches 4 feet or deeper within 25 feet of workers–i.e., every 50 feet.

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46
Q

The operator of a powder-actuated tool must:

A. wear eye protection

B. have a valid operator’s card

C. unload the tool when it is left unattended

D. all of the above

A

D. all of the above

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47
Q

“Tailgate” safety regulations require:

A. a safety check every 10 days

B. a meeting with the foremen every 30 days

C. posting of safety rules

D. all of the above

A

D. all of the above

48
Q

Which of the following must be provided by the employer?

A. sanitary facilities

B. safety devices

C. medical (first-aid) attention

D. all of the above

A

D. all of the above

49
Q

On a one-story building, the employer must provide safety railings if the building is _________ or more high.

A. 7-1/2 feet

B. 12 feet

C. 15 feet

D. 17 feet

A

A. 7-1/2 feet

50
Q

In general, what kind of extension cord should you use?

A. two-wire

B. any standard commercial cord such as one carried in hardware stores

C. three-prong wire

D. multi-conductor “S” type cord or
equivalent

A

C. three-prong wire

“S” cord is heavily insulated but not necessarily grounded.

51
Q

The posts, ledgers, ribbons, and bracing for tube-and-coupler scaffolds must be constructed from _____________ steel tubing.

A. 1 inch ID

B. 2 inches OD

C. 3 inches ID

D. 3 inches OD

A

B. 2 inches OD

OD = outside diameter
ID = inside diameter

52
Q

What is the longest ladder that CavOSHA
allows?

A. 34 feet

B. 44 feet

C. 48 feet

D. 72 feet

A

D. 72 feet

The longest ladder permitted is an extension ladder, which is limited to 72 feet.

53
Q

In general, what is the maximum safe depth that you may dig a trench without shoring?

A. 3 feet

B. 5 feet

C. 7 feet

D. 15 feet

A

B. 5 feet

shores or props used to support or hold up something weak or unstable.

54
Q

Which of the following fire extinguishers is allowed in California?

A. carbon tetrachloride

B. chlorobromomethane

C. methyl bromide

D. all are prohibited due to toxicity

A

D. all are prohibited due to toxicity

55
Q

In a work place, travel distance to a fire extinguisher must not be more than:

A. 25 feet

B. 50 feet

C. 75 feet

D. 100 feet

A

C. 75 feet

56
Q

How often should a fire extinguisher be serviced (tested)?

A. every 6 months

B. every year

C. every 18 months

D. every 2 years

A

B. every year

A fire extinguisher should be tested once every year but should be inspected monthly.

57
Q

The safety valve of a portable air compressor should be popped at least:

A. daily

B. weekly

C. biweekly

D. monthly

A

B. weekly

58
Q

The safest way to handle asbestos is when
it is:

A. cold

B. warm

C. wet

D. dry

A

C. wet

59
Q

Medical and monitoring records regarding asbestos exposure at a work place must be kept for at least ______ years.

A. 3

B. 5

C. 7

D. 30

A

D. 30

60
Q

When operating a forklift, carry the forks:

A. as high as possible

B. as low as possible

C. tilted away from operator

D. mid-level

A

B. as low as possible

61
Q

All guardrails must be able to withstand a
load of _____ pounds per lineal foot.

A. 6

B. 8

C. 12

D. 13

A

D. 13

62
Q

How often should the boom-angle indicator on a crane be inspected by the operator?

A. every day

B. every week

C. every month

D. every year

A

A. every day

63
Q

Mobile cranes with booms over 200 feet or with a capacity greater than _________ require a load-indicating device.

A. 10 tons

B. 25 tons

C. 40 tons

D. 50 tons

A

D. 50 tons

64
Q

Cranes with a boom longer than 60 feet or with a rating greater than _________
require a boom-angle indicator.

A. 5 tons

B. 10 tons

C. 15 tons

D. 20 tons

A

C. 15 tons

65
Q

Every crane, derrick, or cableway exceeding 3 tons capacity must be certified every ________ by a qualified person.

A. day

B. 3 months

C. six months

D. year

A

D. year

66
Q

If a material contains more than ________ asbestos and is sanded, ground, blasted, sawed, cut, shoveled, removed, or handled so as to produce dust during construction, it must be reported to Cal/OSHA authorities.

A. 0.1%

B. 0.5%

C. 5.0%

D. 10.0%

A

A. 0.1%

67
Q

Over an 8-hour period, an employee must not be exposed to more than ______ asbestos fibers/cc air, as determined by the membrane filter method for testing concentrations.

A. 0.1

B. 0.2

C. 1.5

D. 5.0

A

A. 0.1

68
Q

Formerly 2.0 f/cc 068. An employer must test the air at a work place for asbestos concentration if it exceeds _______ fibers/cc air over an 8-hour period.

A. 0.1

B. 1.0

C 15

D. 2.0

A

A. 0.1

69
Q

When placing a ladder, the distance from the wall to the foot of the ladder should be equal to _____ of the distance from the
ground to the top support.

A. 1/10

B. 1/5

C. 1/4

D. 1/3

A

C. 1/4

70
Q

A second guide for ladder placement is to locate the ladder at a ______ angle from the floor to the ladder.

A. 60°

B. 65°

C. 70°

D. 75.5°

A

D. 75.5°

71
Q

It is unsafe to use a step ladder taller than:

A. 10 feet

B. 15 feet

C. 20 feet

D. 25 feet

A

C. 20 feet

72
Q

Do not stand on the top of the ______ rung(s) of a ladder without a safety belt.

A. 4th

B. 3rd

C. 2nd

D. 1st

A

B. 3rd

fall protection must be provided for employees climbing or working on fixed ladders above 24 feet

73
Q

When a ladder is not in use, it should be stored:

A. vertically

B. horizontally

C. on the ground

D. inclined

A

B. horizontally

74
Q

The vertical length of the extended part of a trestle ladder must not be greater than ______ of the height of the base ladder.

A. 2/3

B. 1/2

C. 1/3

D. 1/4

A

B.1/2

75
Q

Ladder rungs must be at least ____________ long.

A. 10 inches

B. 11-1/2 inches

C. 12 inches

D. 13-1/2 inches

A

B. 11-1/2 inches

76
Q

Ladder rungs must be spaced at intervals of:

A. 8 inches

B. 10 inches

C. 11-1/2 inches

D. 12 inches

A

D. 12 inches

77
Q

Which of the following will require a skirted plug?

A. 110-volt spray gun

B. 220-volt drill

C. 440-volt welding machine

D. service in a wet environment

A

C. 440-volt welding machine

78
Q

The safe-distance requirement from overhead electrical lines energized between 600 to 50,000 volts is ________ for people and boom-type equipment in transit.

A. 3 feet

B. 4 feet

C. 6 feet

D. 8 feet

A

C. 6 feet

79
Q

A rolling stage requires locking wheels at __________ in height.

A. 4 feet

B. 6 feet

C. 10 feet

D. always

A

D. always

80
Q

You must use safety lines on spiders and swing stages:

A. over 10 feet

B.over 30 feet

C. only when using safety belts

D. always

A

D. always

81
Q

The minimum clearance required from overhead high-voltage (600V to 50,000V) conductors for boom-type lifting or hoisting equipment while being operated is:

A. 4 feet

B. 6 feet

C. 7-1/2 feet

D. 10 feet

A

D. 10 feet

82
Q

The minimum allowable oxygen concentration at a work site is:

A. 50%

B. 35%

C. 25%

D. 19.5%

A

D. 19.5%

83
Q

A fammable gas, vapor, or combustible particle creates a dangerous air contamination if the concentration is greater than ______ of its lower explosive (flammable) limit or concentration.

A. 50%

В. 35%

C. 25%

D. 20%

A

D. 20%

84
Q

The operator should inspect an industrial truck, forklift, and industrial tow tractor at least:

A. at the start of the shift

B. once a day

C. once a week

D. every two weeks

A

A. at the start of the shift

85
Q

You must obtain a DOSH permit for:

A. construction of trenches or excavations deeper than 3 feet

B. demolition of any building over one story

C. construction of any structure more than three stories

D. all of the above

A

C. construction of any structure more than three stories

DOSH permits are required for
construction of trenches or excavations 5 feet or deeper that workers must enter and for construction or demolition of any building over three stories.

86
Q

Lumber piles must be no higher than _________ if handled with equipment.

A. 12 feet

B. 16 feet

C. 20 feet

D. 24 feet

A

C. 20 feet

87
Q

All blasting accidents affecting worker safety must be reported to DOSH:

A. immediately

B. within 24 hours

C. within 48 hours

D. no later than 3 days after the accident occurred

A

B. within 24 hours

88
Q

Explosives must be kept clear of electrical circuits by at least:

A. 15 feet

B. 25 feet

C. 50 feet

D. 100 feet

A

B. 25 feet

89
Q

Which of the following tools require a constant-contact on/off switch?

A. circular saws

B. powered tampers

C. rock drills

D. all of the above

A

A. circular saws

90
Q

If the wall facing electrical equipment (rated at 600V or less with energized and exposed parts) is well insulated, the minimum clearance required is:

A. 2 feet

B. 3 feet

C. 3-1/2 feet

D. 4 feet

A

B. 3 feet

91
Q

What is the minimum distance a worker must remain from an overhead high-voltage line?

A. 4 feet

B. 6 feet

C. 7-1/2 feet

D. 10 feet

A

B. 6 feet

92
Q

What color shirt must a street or highway worker wear?

A. orange

B. white

C. red

D. black

A

A. orange

93
Q

How many workers are allowed on a suspended scaffold at any one time?

A. 1

B. 2

C. 3

D. 4

A

B. 2

94
Q

If a worker is exposed to a fall of more than __________, a safety belt and lifeline must be provided.

A. 15 feet

B. 25 feet

C. 50 feet

D. 75 feet

A

A. 15 feet

Fall protection trigger heights must be observed at all times:

2 stories or 30’ whichever is less: Connecting structural steel (Iron workers)

20’: Most roofing work

15’: Panelized roof systems, residential framing and roofing activities, work on 4” nominal or wider structural members and other than connecting steel (iron workers)

7 1⁄2’: Work on unprotected platforms, scaffolds, or edges of structures (within 6’)

6’: Work with rebar/ or similar projections (rod busters)

95
Q

When working on a suspended scaffold, each worker must be provided a safety belt and lifeline at:

A. one story

B. two stories

C. three stories

D. always

A

D. always

96
Q

ROPS stands for:

A. roll-over protective structure

B. railing on protective structure

C. rope on public scaffold

D. roof offset personnel scaffold

A

A. roll-over protective structure

97
Q

Which of the following wires is hot?

A. white

B. black

C. green

D. none of the above

A

B. black

White is neutral; green is ground.

98
Q

Service conductors must have a clearance of not less than __________ from windows

A. 3 feet

B. 4 feet

C. 8 feet

D. 10 feet

A

A. 3 feet

99
Q

For optimal safety when deenergizing a circuit:

A. take out fuses

B. turn circuit breaker off and put a tape on it

C. lock circuit breaker in open position and tag it

D. wear a hard hat

A

C. lock circuit breaker in open position and tag it

100
Q

Which of the following is a Class-I hazardous location?

A. combustible vapors or gases

B. combustible dust

C. combustible fibers or flyings

D. all of the above

A

A. combustible vapors or gases

A “Class I Location” is created by the presence of flammable gases or vapors in the air in sufficient quantities to be explosive or ignitable.

101
Q

What is the minimum size lumber that can be used to build scaffolding?

A. 2 inch × 4 inch

B. 2 inch x 6 inch

C. 4 inch × 4 inch

D. only metal should be used to build scaffolding

A

A. 2 inch × 4 inch

The minimum size lumber that can be used to build scaffolding for light trades is 2 inch × 4 inch. Light trades include carpenters, sheet metal workers, painters, and other trades not using heavy tools or storing heavy materials.
The minimum size lumber that can be used to build scaffolding for heavy trades is 4 inch × 4 inch. Heavy trades include masons, concrete workers, and other trades that require heavy tools or materials.

102
Q

There are acceptable safety precautions
when investigating an active circuit. Which one is the most important?

A. verify voltage

B. wear a hard hat

C. make sure overcurrent device is off

D. Personal Protective Equipment (PPE)

A

D. Personal Protective Equipment (PPE)

Wearing the appropriate PPE is crucial. This typically includes insulated gloves, safety glasses, non-conductive footwear, and sometimes a face shield or protective clothing. PPE helps protect against electric shocks, burns, and other potential hazards.

103
Q

If co-worker falls down and suffers a deep, bleeding gash to the head, you should:

A. apply direct pressure to the wound

B. apply a tourniquet

C. find and depress the main supply artery

D. administer CPR

A

A. apply direct pressure to the wound

104
Q

The symptoms of shock are:

A. pale and sweaty skin, slow and weak pulse

B. pale and sweaty skin, fast and strong pulse

C. pale and sweaty skin, rapid and weak pulse

D. Flushed (reddened) skin

A

C. pale and sweaty skin, rapid and weak pulse

105
Q

Service drops over public streets, sidewalks, and commercial areas subject to truck traffic must have a minimum clearance of _________ from final grade.

A. 10 feet

B. 12 feet

C. 15 feet

D. 18 feet

A

D. 18 feet

A service drop is an overhead electrical line running from a utility pole, to a customer’s building or other premises.

106
Q

Where the voltage is limited to 300 volts to ground, service drops over residential property and driveways must have a minimum clearance of:

A. 10 feet

B. 12 feet

C. 15 feet

D. 18 feet

A

B. 12 feet

107
Q

In order to be classified as “high voltage,” voltage must be greater than:

A. 240 volts

B.300 volts

C. 600 volts

D. 700 volts

A

C. 600 volts

108
Q

After a major accident, Cal/OSHA must investigate within _____ days.

A. 3

B. 5

C. 7

D. 10

A

A. 3

109
Q

The safe-distance requirement from overhead electrical lines energized between 600V and 50,000V is ________ for boom-type lifting and hoisting equipment when not in use.

A. 4 feet

B. 6 feet

C. 7-1/2 feet

D. 10 feet

A

B. 6 feet

110
Q

Cal/OSHA requires handrails for scaffolds
over ________ in height.

A. 5 feet

B. 7-1/2 feet

C 17 feet

D. 36 feet

A

B. 7-1/2 feet

111
Q

What is the minimum distance a worker must be from an overhead high-voltage line?

A. 4 feet

B. 7-1/2 feet

C. 6 feet

D. 10 feet

A

C. 6 feet

112
Q

Equipment of __________ must be located either in a locked room or in such a location as to be under the supervision of authorized personnel only.

A. 100 volts

B. 200 volts

C. 400 volts

D. 600 volts

A

D. 600 volts

113
Q

Utility-owned overhead coaxial lines are permitted at a height of not less than _________ above swimming pools or towers.

A. 6 feet

B. 10 feet

C. 15 feet

D. 18 feet

A

B. 10 feet

114
Q

What is the maximum width of a trench before a bridge is required?

A. 24 inches

B. 30 inches

C. 36 inches

D. 40 inches

A

B. 30 inches

A bridge is required when a trench is at least 6 feet deep and wider than 30 inches.

115
Q

What is the required height for guardrails around a trench?

A. 34 inches - 38 inches

B. 36 inches - 40 inches

C. 42 inches - 45 inches

D. 43 inches - 48 inches

A

C. 42 inches - 45 inches

Guardrails for fall protection must be between 42 inches and 45 inches high.
Handrails for ramps and stairs must be between 34 inches and 38 inches high.

(c-51) Structural Steel (6 decks)

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