lessons 1 : electrical safety and principles

Question 1

the MSHA is an abbreviation for the___?

Answer 1

Mine Safety and Health Administration

Question 2

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

Answer 2

NEC

Question 3

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

Answer 3

SDS

Question 4

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

Answer 4

Electrical shock

Question 5

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

Answer 5

Paralysis

Question 6

Define a Qualified person

Answer 6

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.

Question 7

what type of clothing is required when working with live circuits

Answer 7

arc- rated

Question 8

most common types of ladders used by technicians

Answer 8

fiberglass

Question 9

5 types of fire extinguishers

Answer 9

A, B, C, D, and K

Question 10

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

Answer 10

current

Question 11

what limits the flow of electrons in an electrical circuit

Answer 11

resistance

Question 12

material used to ___electricity that has low resistance

Answer 12

conduct

Question 13

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

Answer 13

inductor

Question 14

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

Answer 14

resistive

Question 15

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

Answer 15

current

Question 16

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

Answer 16

employer

Question 17

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

Answer 17

Arc-Rating

Question 18

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

Answer 18

back injuries

Question 19

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

Answer 19

21%

Question 20

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

Answer 20

Magnetic field

Question 21

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

Answer 21

The NFPA

Question 22

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

Answer 22

positioning system

Question 23

what class of fire includes burning electrical components such as motors

Answer 23

class C

Question 24

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

Answer 24

CAS

Question 25

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

Answer 25

class G

Question 26

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

Answer 26

4'

Question 27

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

Answer 27

goggles

Question 28

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

Answer 28

halyard

Question 29

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

Answer 29

NFPA 70E

Question 30

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

Answer 30

36,000

Question 31

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

Answer 31

Decible (dB)

Question 32

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

Answer 32

insulated matting

Question 33

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

Answer 33

NRR

Question 34

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

Answer 34

17,000

Question 35

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

Answer 35

7,500

Question 36

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

Answer 36

500

Question 37

what class fire is it when cardboard or paper is burning

Answer 37

class A

Question 38

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

Answer 38

class C

Question 39

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

Answer 39

class B

Question 40

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

Answer 40

class D

Question 41

what establishes procedures that must be followed when a fire occurs

Answer 41

Fire safety plan

Question 42

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

Answer 42

Ohms law

Question 43

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

Answer 43

False

Question 44

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

Answer 44

False

Question 45

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

Answer 45

True

Question 46

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

Answer 46

True

Question 47

T or F the NEC is updated every 5 years

Answer 47

False every 3 years

Question 48

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

Answer 48

False Hole watch

Question 49

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

Answer 49

True

Question 50

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

Answer 50

False current leads voltage (voltage lags current)

Question 51

what fire classification would aluminum paste be in

Answer 51

class D

Question 52

what fire classification would a circuit breaker panel be in

Answer 52

Class C

Question 53

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

Answer 53

Class K

Question 54

what fire classification would a solvent tank be in

Answer 54

Class B

Question 55

what fire classification would wooden pallets be in

Answer 55

class A