Download Chapter 16

Supervisors' Safety Manual, Tenth Edition
Chapter 16: Electrical Safety
True or False
Directions: Circle T if the statement is True and F if the statement is False.
1.
T
F
Resistance slows the flow of current and causes heat.
2.
T
F
A circuit is an unbroken, conducting path around which electricity can
flow.
3.
T
F
A current of 100 milliamperes flowing through the heart can be fatal.
4.
T
F
A milliampere equals 1,000 amperes.
5.
T
F
Electricity is not live until current flows.
6.
T
F
Wet or damp locations can increase the potential for electric shock.
7.
T
F
A circuit breaker is designed to protect people from electric shock.
8.
T
F
One use of a conducting material is as an insulator.
9.
T
F
A ground-fault circuit interrupter can help protect people when there is
a flow of current to ground.
10.
T
F
A ground-fault circuit interrupter is useful in a wet environment.
11.
T
F
A watt measures the rate at which electrical energy is turned into work.
12.
T
F
A volt is a measure of the strength or force of an electric current.
13.
T
F
A double-insulated tool protects against shock resulting from defects in
an electrical tool’s cord and plug.
14.
T
F
Water is a good conductor of electricity.
15.
T
F
Grounding wires are generally colored blue.
Multiple Choice
Directions: Select the best answer and place the corresponding letter in the box provided.
16.
2Which of the following is a conductor of electricity?
A. Copper
B. Water
C. People
D. All of the above.
17.
2In a properly wired appliance, what does the “hot” wire do?
A. Leads to ground.
B. Carries current back to the outlet.
C. Carries current to the appliance’s switch.
D. All of the above.
18.
2Which of the following statements about electricity is true?
A. Electrical current Is not “live” until current flows.
B. Electrical current flows only when there is a complete loop, out from
and back to the power source.
C. Electrical current always returns to its source.
D. All of the above.
19.
2What affects the degree of injury a person receives when shocked?
A. The presence of metal objects, such as a watch, necklace, or ring, that
increase the shock.
B. The path the current takes through the body.
C. Size, age, and condition of the person.
D. All of the above.
20.
2The third prong on some electrical cords:
A. Carries the third phase of current in 220 volt circuits.
B. Grounds the equipment when plugged into a properly wired outlet.
C. Indicates the appliance requires high voltage.
D. All of the above.
21.
2All are likely to be a supervisor’s responsibility when it comes to electrical
safety EXCEPT:
A. Ensuring all employees exposed to electrical hazards receive training in
electrical safety.
B. Making sure electrical housekeeping hazards are reported and
corrected.
C. Correcting electrical hazards yourself to protect your workers.
D. Rating employees on compliance with electrical safety practices.
22.
2When using electrical equipment in a hazardous environment:
A. It is fine to use normal equipment, but with more caution.
B. Never use electrical equipment in hazardous areas.
C. Use only equipment designed for that specific hazardous environment.
D. All of the above.
23.
2Before using an extension cord, inspect it for all of the following EXCEPT:
A. The color of the outer insulation.
B. The number of prongs.
C. Whether the cord is frayed or split.
D. Cracks or splits in the outer insulation.
24.
2All of the following are safe practices EXCEPT:
A. Finding out what tripped a circuit breaker before resetting it.
B. Ensuring the fuse rating matches the rating of the circuit.
C. Unplugging by grasping the cord.
D. Using a ground fault circuit interrupter around water.
25.
2Which of the following is a factor in electric shock?
A. The presence or absence of grounding.
B. Wet or damp location.
C. The path the current takes through the body.
D. All of the above.
Chapter 16: Electrical Safety
Answer Key
1.
T
2.
T
3.
T
4.
F
5.
T
6.
T
7.
F
8.
F
9.
T
10. T
11. T
12. T
13. F
14. T
15. F
16. D
17. C
18. D
19. D
20. B
21. C
22. C
23. A
24. C
25. D