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NABCEP Entry Level > Safety Basics > Flashcards

Safety Basics Flashcards

Use this deck to learn about all of the safety aspects of a PV system installation.

1
Q

How many inches must toe boards on guardrail system be?

A

3.5”

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2
Q

Stairs should be installed at an angle no greater than ______ degrees?

A

50

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3
Q

How many feet must stairway landings be?

A

12

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4
Q

The range of 39”-45” is the requirement for what?

A

Guardrails for protecting open-sided floors and platforms

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5
Q

Stairways with four or more risers, or taller than 30 inches, must be equipped with what?

A

At least one handrail

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6
Q

The battery should not be charged, when what happens?

A

The electrolyte freezes

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7
Q

_____mA electrical currents can paralyze muscles and cause a worker to fall when working at heights.

A

10

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8
Q

Is high cell temperature dangerous?

A

No

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9
Q

What is required when an employee or worker falls 6ft or more?

A

Fall protection

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10
Q

What is used to prevent unknowing individuals from energizing electrical circuits?

A

Lockout and tagging

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11
Q

Electrical currents as low as 75mA AC can cause what?

A

A rapid, irregular heartbeat and lead to death in a few minutes

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12
Q

What are lockout and tagging used for?

A

Preventing unknowing individuals from energizing electrical circuits while they are being serviced or maintained.

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13
Q

What is the purpose of the ground-fault protection device in a PV system?

A

Reducing the possibility of fire from an arching fault to ground

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14
Q

How many pounds must handrails be able to withstand?

A

200

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15
Q

If there is no specific fall protection system established, according to OSHA, is it acceptable to provide fall protection by using a person competent in recognition of fall hazards who is a part of the work crew and is capable of warning other workers?

A

No, only acceptable when a person is not part of the work crew but is stationed at the levels of the work crew within sight and speaking distance of the crew, and is capable of warning other workers

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16
Q

What height is NOT necessary to establish a fall protection system?

A

4 feet

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17
Q

OSHA requires that fall protection be used for walkways and ramps, holes and excavations, roofs, and wall openings where an employee or worker can fall _____ft or more.

A

6

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18
Q

What must be 3.5” high on guardrail systems?

A

Toe boards

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19
Q

15.4 ft is the min. length of a ladder required to access a roof surface of how many feet off the ground?

A

12ft

20
Q

Ohm’s law states that an increase in resistance is inversely proportional to an increase in current

A

TRUE

21
Q

Class C offers what for hardhats?

A

The maximum head protection from impacts

22
Q

What is a factor of high cell temperature?

A

It is not dangerous

23
Q

A 24ft extension ladder is used to access an upper landing 20ft off the ground. How far should the base of the ladder be positioned back from the point the ladder makes contact with the upper landing?

A

5ft

24
Q

How many inches must a stairway with four or more risers be in order to be equipped with at least one handrail?

A

30

25
Q

When operating a power drill, what PPE is the most important?

A

Goggles

26
Q

What must be able to withstand a force of 200 pounds?

A

Handrails

27
Q

What class of hardhat offers the maximum head protection from impacts and electrical shock?

A

Class B.

28
Q

What must be equipped with non-conductive side rails?

A

Ladders used where the employee or ladder could contact exposed energized electrical equipment

29
Q

Electrical currents as low as 10mA can do what to the human body?

A

Can paralyze muscles and cause a worker to fall when working at heights

30
Q

At every 12 ft. or less of a vertical rise what must be there?

A

Stairway landings

31
Q

What must be installed at an angle no greater than 50 degrees?

A

Stairs

32
Q

OSHA mandates what to be 19 inches or more on a job site?

A

A stairway or ladder used at points of access where there is an elevation break

33
Q

Goggles in PPE is most important when operating what?

A

A power drill

34
Q

Using PPE in accordance with training & instructions is what?

A

An employee’s responsibility for PPE

35
Q

In excess of what height should a fall protection system be established?

A

6 feet

36
Q

How many inches should guardrails for protecting open-sided floors and platforms be?

A

Between 39”-45”

37
Q

According to the NEC, the battery enclosure must have provisions for sufficient diffusion and ventilation of the gases from the battery to prevent the accumulation of an explosive mixture and if a tray is used, it shall be resistant to deteriorating action by the electrolyte in case of what?

A

If flooded lead-acid batteries are selected for energy storage of a PV system

38
Q

What must a ladder be equipped with when used where the employee or ladder could contact exposed energized electrical equipment?

A

Non-conductive side rails.

39
Q

If they are employed for fall protection, safety nets must be deployed no further than how many ft below where work is being done?

A

30

40
Q

Reducing the possibility of fire from an arching fault to the ground is the purpose of what device?

A

The ground-fault protection device in a PV system

41
Q

A _____mA AC electrical current can cause a rapid, irregular heartbeat and lead to death in a few minutes?

A

75

42
Q

If there is no specific fall protection system established, according to OSHA, what conditions allow a person to be competent in recognition of fall hazards?

A

When the person is not a part of the work crew, but are stationed at the levels of the work crew, within sight and speaking distance of the crew, and who is capable of warning other workers

43
Q

What is the maximum length for safety nets under the fall protection?

A

30 ft

44
Q

How many inches does OSHA mandate that a stairway or ladder be used at points of access where there is an elevation break?

A

19

45
Q

What is the min. length of a ladder required to access a roof surface 12 ft off the ground?

A

15.4 ft

46
Q

What is one of an employee’s responsibilities for PPE?

A

Using PPE in accordance with training & instructions

NABCEP Entry Level (7 decks)

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