Deck 20: Electrical Hazards

Question 1

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

Answer 1

True

Question 2

Power is measure in:

A) Amps
B) Ohms
C) Watts
D) Volts
E) Hertz

Answer 2

Watts

Question 3

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

Answer 3

False

Question 4

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

A) Arc flash
B) Insulation failure
C) Lightning
D) Spark
E) Ground faults

Question 5

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

Question 6

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

Question 7

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

Question 8

The CE Code specifies industrial and domestic electrical safety precautions.

Question 9

Bonding is an effective means of reducing electrostatic discharge hazards.

Question 10

In Canada, the rules and regulations regarding installation, wiring, and maintenance of electrical equipment are governed by the Canadian Electrical Code (CE Code).

Question 11

The current effect on the human body of 10 to 15 milliamps may result in death after 3 minutes of contact.

Question 12

If an electrician sees that the neutral wire was broken causing the motor to no longer operate, what type of problem exists in the circuit?

A) A short circuit
B) An open circuit
C) A grounded circuit
D) An insulated circuit
E) Current overload

Question 13

Ohm's law is stated as:

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

Question 14

Television antenna towers do not require grounding.

Question 15

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

Question 16

What is described by the potential difference between two points in a circuit?

A) Resistance
B) Voltage
C) Wattage
D) Capacitance
E) Static

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Question 21

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

A) 60
B) 110
C) 115
D) 210
E) 220

Question 22

What is the likely effect of 5 milliamps of electrical current?

A) No sensation
B) Painful shock
C) Unable to let go
D) Muscle contractions
E) Heart fibrillations

Question 23

Which method is commonly used to protect workers against potentially fatal exposure to electrical currents?

A) Ionizers
B) Humidification
C) Double insulation
D) Bonding
E) Fuses

Question 24

A safety device compares the current flow in the hot wire to the current in the neutral wire to detect the flow of current to ground?

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

Question 25

What means of electrical safety is being employed when two pieces of equipment connected by a conductor to eliminate the difference in static charge potential between the materials?

A) Grounding
B) Short circuiting
C) Interrupting
D) Open circuiting
E) Bonding