Deck 18: Electrical Hazards

Question 1

Which of the following are covered in the latest version of NFPA 70E?

A)Fuses
B)Protective devices
C)A and B
D)None of the above

Answer 1

C

Question 2

Static electricity is produced by a surplus or deficiency of electrons on the surface of material.

Answer 2

True

Question 3

A short circuit is one in which the load has been removed or is bypassed.

Answer 3

True

Question 4

Atoms have a centrally located nucleus consisting primarily of electrons.

Question 5

Current flow is measured in ohms.

Question 6

Insulators do not conduct electricity well, if at all.

Question 7

A common 110 volt electric circuit consists of two components: hot wire and ground wire.

Question 8

Conductors are substances that have no free electrons at room temperature.

Question 9

Power is measured in watts.

Question 10

Approximately how many injuries occur each year as a result of improper use of extension cords?

A)18,000
B)346,500
C)1,000,000
D)2,500

Question 11

The latest version of NFPA 70E omitted maintenance requirements for molded-case circuit breakers.

Question 12

Frequency is measured in hertz.

Question 13

Electricity is the flow of negatively charged particles through an electrically conductive material.

Question 14

OSHA's standards relating to electricity are found in:

A)29 CFR 1910.919
B)29 CFR 1910 (Subpart E)
C)29 CFR 1910 (Subpart S)
D)29 CFR 1910.654(2)(i)

Question 15

Which of the following are common sources of electrical hazards?

A)Bare wires and deteriorated insulation
B)Dampness and static electricity
C)Both A and B
D)Neither A nor B

Question 16

Interconnected power strips are known as what?

A)Daisy chains
B)Power chains
C)Wiring chains
D)None of the above

Question 17

Which of the following statements about an electric spark is most accurate?

A)Is a result of a bad grounding wire
B)Involves little power and is discharged into a small space
C)Is created by static electricity only
D)Can cause electrocution

Question 18

Which of the following is not used for reducing static buildup?

A)Antistatic materials
B)Radioactive neutralizers
C)Fuses
D)Ionizers