Deck 14: Electrical Hazards

Question 1

Which of the following is not included in NFPA 70E?

A) General maintenance requirements
B) Protective devices
C) Training requirements for electrical and electronic engineers
D) Fuses

Answer 1

C

Question 2

Television antenna towers do not require grounding.

Answer 2

False

Question 3

Most industrial and domestic use of electricity is supplied by direct current.

Answer 3

False

Question 4

Power is measured in:

A) Resistance
B) Amps
C) Ohms
D) Watts

Question 5

An arc flash is an electrical short circuit that travels through the air.

Question 6

Grounding of electrical equipment is the primary method of reducing electrical hazards.

Question 7

The NEC specifies industrial and domestic electrical safety precautions.

Question 8

A continuity tester may be used to determine whether a conductor is properly grounded or has a break in the circuit.

Question 9

In the US, standard AC circuits cycle how many times per second?

A) 60
B) 110
C) 220
D) 115

Question 10

To reduce the risk of electrocution by lightning, do not use electrical equipment during storms.

Question 11

The greatest danger to humans suffering electrical shock results from current flow.

Question 12

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

Question 13

The path of flow of electrons is from a positive source to a negative point.

Question 14

A tree is a common natural path for what type of electrical hazard?

A) Arc
B) Insulation failure
C) Lightning
D) Spark

Question 15

Ohm's law is stated as:

A) W=VI
B) V=IR
C) W=VR
D) I=RW

Question 16

A circuit tester may be used to test 110-volt circuits only.

Question 17

Circuit breaker testing requirements are not contained in NFPA 70E.

Question 18

A safety device used to detect the flow of current to the ground and to open the circuit is:

A) Circuit breaker
B) Fuse
C) Conductor
D) Ground fault interrupter