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Outside 1st year Lesson 1 > Lesson 9 > Flashcards

Lesson 9 Flashcards

1
Q

Electricity, as a hazard, exposes workers to electric shock, electrocution, and ? .

Select one:

a. explosions
b. exposure incidents
c. oxygen-deficient atmosphere
d. suffocation

A

a. explosions

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2
Q

In 2014, what ratio of construction worker injuries resulted in death?

Select one:

a. 1 out of 5
b. 1 out of 50
c. 1 out of 100
d. 1 out of 1,000

A

a. 1 out of 5

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3
Q

A common and sometimes overlooked conductor is the surface or subsurface of ? .

Select one:

a. anchor plates
b. poles
c. substation bus work
d. the earth

A

d. the earth

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4
Q

Dry skin has a fairly high ? to electric current. But when the skin is moist or wet, it acts as a conductor.

Select one:

a. connection
b. inductance
c. reactance
d. resistance

A

d. resistance

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5
Q

Four factors that determine the severity of an electric shock through the body are current amount, path, frequency, and ? .

Select one:

a. ambient temperature/humidity
b. amount of voltage
c. length of time it flows
d. quality of contact to ground

A

c. length of time it flows

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6
Q

Slight shock felt; not painful but disturbing. Average individual can let go.

These reactions best describe a current flow of   ?  .
Select one:
a. 5 mA 
b. 15 mA 
c. 20 mA 
d. 30 mA
A

a. 5 mA

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7
Q

Extreme pain, respiratory arrest, severe muscular contractions. Death is possible.

These reactions best describe a current flow of   ?   to 150 milliamperes.
Select one:
a. 6.3 
b. 12.6 
c. 25 
d. 50
A

d. 50

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8
Q

An electrical accident can result in ? , such as electrical, arc, or thermal.

Select one:

a. burns
b. explosions
c. HAZMAT conditions
d. mechanical failure

A

a. burns

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9
Q

During an electrical shock, the ? often causes the muscles to contract.

Select one:

a. electrical stimulation
b. environmental condition
c. location of the exit wound
d. moisture content of the skin

A

a. electrical stimulation

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10
Q

Electrical shocks can cause involuntary muscle reactions. These reactions can result in a wide range of injuries from collisions or ? .

Select one:

a. blindness
b. falls
c. lockjaw
d. nerve spasticity

A

b. falls

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11
Q

A victim of a severe shock may suffer internal hemorrhages and destruction of tissues, nerves, and muscles that are not ? .

Select one:

a. life threatening
b. readily visible
c. treatable
d. very serious

A

b. readily visible

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12
Q

Most electrical accidents result from unsafe equipment, unsafe environment, and unsafe work practices.

Select one:
True
False

A

True

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13
Q

Grounding is normally a secondary protective measure to protect against electrical shock. Grounding does not guarantee you will not get a shock from electrical current.
Select one:

True
False

A

True

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14
Q

Components designed to protect conductors and equipment from overheating by opening the circuit when there is a risk of a ground fault are ? .

Select one:

a. fuses and circuit breakers
b. fuses and tap changers
c. sectionalizers
d. transformers and voltage regulators

A

a. fuses and circuit breakers

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15
Q

Devices designed to interrupt the flow of electricity within 1/40th of a second are called ? .

Select one:

a. air-blast circuit breakers
b. ground fault circuit interrupters
c. oil-filled circuit breakers
d. oil-filled circuit reclosers

A

b. ground fault circuit interrupters

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16
Q

A properly installed grounding conductor has a low resistance to ground and greatly reduces the amount of ? .

Select one:

a. current passing through the body
b. current that passes to ground
c. current the circuit can carry
d. resistance to electrical

A

a. current passing through the body

17
Q

Conductors and parts of electric equipment not deenergized using procedures defined in OSHA 1910.269(d) “Hazardous Energy Control” or OSHA 1910.269(m) “Deenergizing Lines and Equipment for Employee Protection” must be treated as ? .

Select one:

a. a hazard
b. conductive
c. energized
d. isolated

A

c. energized

18
Q

If you work in an area where there are potential electrical hazards, your employer must provide you with protective equipment.

Select one:
True
False

A

True

19
Q

All employees who work with electrical power generation, transmission, and distribution must be properly trained in the safety-related work practices involved.

Select one:
True
False

A

True

20
Q

When a “system operator” is in charge of a circuit, and a crew needs the circuit de-energized, the person responsible for the clearance is the ? .

Select one:

a. designated employee who requested the clearance
b. division manager
c. general foreman who is with the crew
d. working foreman

A

a. designated employee who requested the clearance

21
Q

Grounding jumpers used on a transmission or distribution circuit must be ? .

Select one:

a. insulated to the values of the line on which they are being applied
b. made up of a four-conductor set of tinned copper leads with alligator clipends
c. no larger than 4 AWG copper four-conductor
d. of a size capable of conducting the maximum fault current for the time necessary to clear the fault

A

d. of a size capable of conducting the maximum fault current for the time necessary to clear the fault

22
Q

Breakers used in wet locations, construction sites, and other high risk areas as a means of circuit protection must be of the ? type.

Select one:

a. AFCI
b. GFCI
c. GFI
d. GFPP

A

b. GFCI

23
Q

A breaker required to be used in wet locations automatically shuts off the electric power with as little as ? .

Select one:

a. 5 mA
b. 10 mA
c. 15 mA
d. 20 mA

A

a. 5 mA

24
Q

Using listed and labeled portable tools protected by a system of single insulation is a form of incorporated protection designed to protect personnel against electrical shock.

Select one:
True
False

A

False

25
Q

A(n) ? fault is a short circuit caused when an object in contact with the earth contacts a live conductor.

Select one:

a. ground
b. isolation
c. phase-to-phase
d. system

A

a. ground

26
Q

If a pole contacts a live circuit while being installed and also contacts the ground, a voltage ? may be set up at the base of the pole.

Select one:

a. circuit
b. corona path
c. geometric stress relief path
d. gradient

A

d. gradient

27
Q

One form of worker protection from step touch potential is to ground all of the vehicles ? .

Select one:

a. individually
b. near the outriggers
c. on the system neutral
d. together

A

d. together

28
Q

When grounding a boom truck before using it near an energized circuit, the best ground source to attach ground jumpers to is a(n) ? .

Select one:

a. down guy wire
b. eight-foot ground rod driven into sandy soil
c. permanent ground network such as a neutral or steel tower leg
d. temporary driven ground rod pushed into the earth two feet

A

c. permanent ground network such as a neutral or steel tower leg

29
Q

The only real protection available to people working around a vehicle when a boom makes contact with a live conductor is to stay on the vehicle or ? the vehicle.

Select one:

a. move
b. operate the lower controls on
c. quickly ground
d. stay away from

A

d. stay away from

30
Q

Grounding a vehicle to the ? promotes a fast trip-out of the circuit should the vehicle become energized and also promotes the collapse of the voltage in the system.

Select one:

a. neutral
b. other vehicles
c. pole ground
d. vehicle frame

A

a. neutral

31
Q

A frequent hazard on a construction site involves a cord assembly with improperly connected ? .

Select one:

a. area lighting
b. breakers
c. terminals
d. ventilation

A

c. terminals

32
Q

When a cord connector on a portable tool is wet, hazardous ? can occur on the equipment grounding conductor and can be dangerous if someone picks up the tool.

Select one:

a. electrical leakage
b. electrical shunt
c. electrolysis
d. grounding

A

a. electrical leakage

33
Q

According to OSHA, the ? is responsible for meeting the requirements of providing GFCIs for all 120-volt, single-phase, 15- and 20-ampere receptacle outlets on construction sites used for temporary power.

Select one:

a. customer
b. employer
c. job safety inspector
d. job superintendent

A

b. employer

Outside 1st year Lesson 1 (16 decks)

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