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electrical installations: intro to industrial wiring > lessons 1 : electrical safety and principles > Flashcards

lessons 1 : electrical safety and principles Flashcards

safety fundamentals to any electrical work to be performed, injuries, fires, and accidents that can be prevented.

1
Q

the MSHA is an abbreviation for the___?

A

Mine Safety and Health Administration

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2
Q

The purpose of the ___ is to protect people and property from hazards that arise from the use of electricity.

A

NEC

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3
Q

A(n) ___ is printed material used to relay chemical hazard info from the manufacturer, importer, or distributor to the technician

A

SDS

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4
Q

Electrical safety guidelines are used to create a safe work environment and prevent ___ and are based on requirements of the NFPA, NEC, MSHA, and OSHA

A

Electrical shock

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5
Q

Electrical shock effects vary from a mild sensation to ___, and possibly death

A

Paralysis

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6
Q

Define a Qualified person

A

is a person who is trained and has special knowledge of the construction and operation of electrical equipment or specific task. is trained to recognize and avoid electrical hazards that might be present with respect to the equipment or specific task.

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7
Q

what type of clothing is required when working with live circuits

A

arc- rated

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8
Q

most common types of ladders used by technicians

A

fiberglass

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9
Q

5 types of fire extinguishers

A

A, B, C, D, and K

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10
Q

what is called when you have the flow of electrons in an electrical circuit

A

current

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11
Q

what limits the flow of electrons in an electrical circuit

A

resistance

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12
Q

material used to ___electricity that has low resistance

A

conduct

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13
Q

what is an electrical device that stores electrical energy by means of a magnetic field

A

inductor

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14
Q

a circuit supplying and incandescent lamp is an example if a ___ circuit

A

resistive

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15
Q

power is dependent on the amount of voltage and ___ in a circuit

A

current

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16
Q

it is the responsibility of the ___ to obtain any missing SDS files if they are not provided for a hazardous material

A

employer

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17
Q

Flame resistant clothing mat or may not have a(n) ___

A

Arc-Rating

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18
Q

what are the most common injuries in the work place that results in lost time

A

back injuries

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19
Q

an increase in the O2 level, above the normal range, or ___%, increases the explosive potential of combustible gasses

A

21%

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20
Q

what is produced around a conductor, any time current moves through it

A

Magnetic field

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21
Q

what national organization provides guidance in assessing the hazards of the products of combustion

A

The NFPA

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22
Q

what is used to hold a technician in place while keeping their hands free to perform work

A

positioning system

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23
Q

what class of fire includes burning electrical components such as motors

A

class C

24
Q

chemicals listed on the SDS an be identified by name or by a number assigned by who

A

CAS

25
Q

what class of protective helmet protects against low voltage shock burns, and impact hazards, and are commonly used in construction

A

class G

26
Q

confined spaces include open top spaces more than ___’ in depth

A

4’

27
Q

eye protecting device with a flexible frame that is secured on the face with an elastic headband

A

goggles

28
Q

what is a rope that is used for hoisting and lowering objects called

A

halyard

29
Q

with few exceptions, osha uses the NEC and ___ guidelines to ensure a safe electrical environment

A

NFPA 70E

30
Q

electrical insulating gloves are classified for working voltages of 500v to ___v

A

36,000

31
Q

what is a unit of measurement to express the relative intensity of sound called

A

Decible (dB)

32
Q

a floor covering that provides technicians protection from electrical shock when working on live electrical circuits is called what

A

insulated matting

33
Q

ear protection is assigned what kind of number based on the noise level reduction

A

NRR

34
Q

insulated electrical gloves that have a yellow label on them have a maximum rating of how many volts

A

17,000

35
Q

insulated electrical gloves that have a white label on them have a maximum rating of how many volts

A

7,500

36
Q

insulated electrical gloves that have a beige label on them have a maximum rating of how many volts

A

500

37
Q

what class fire is it when cardboard or paper is burning

A

class A

38
Q

a fire that starts in an electrical panel due to an arc flash is what class of fire

A

class C

39
Q

what class fire is it when a gasoline storage can is burning

A

class B

40
Q

burning copper paste in a paint facility requires what class fire extinguisher

A

class D

41
Q

what establishes procedures that must be followed when a fire occurs

A

Fire safety plan

42
Q

what is the relationship between current(I), voltage(V), and resistance(R) in a circuit

A

Ohms law

43
Q

T or F
foot protection is worn to prevent injuries that are typically caused by objects falling from higher than 6’

A

False

44
Q

T or F
per the NFPA 70E “only qualified persons shall perform testing work on or near energized parts operating at 500v or more”

A

False

45
Q

T or F
air-fuel concentrations above the UEL are too rich to burn

A

True

46
Q

T or F
distribution systems are rated by the type of current flow, voltage level, maximum current value, number of phases, and by the energy it can deliver under certain conditions

A

True

47
Q

T or F
the NEC is updated every 5 years

A

False
every 3 years

48
Q

T or F
standby personel who remain just outside a confined space while workers are inside are commonly referred to as “entry guards”

A

False
Hole watch

49
Q

T or F
wood ladders should never be painted because it covers up any visible defects

A

True

50
Q

T or F
in a capacitive circuit, current lags voltage (voltage leads current)

A

False
current leads voltage (voltage lags current)

51
Q

what fire classification would aluminum paste be in

A

class D

52
Q

what fire classification would a circuit breaker panel be in

A

Class C

53
Q

what fire classification would a commercial deep-fat fryer be in

A

Class K

54
Q

what fire classification would a solvent tank be in

A

Class B

55
Q

what fire classification would wooden pallets be in

A

class A

electrical installations: intro to industrial wiring (4 decks)

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