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1 Copyright © 2020 McGraw-Hill Education. All rights reserved.No reproduction or distribution without the prior written onsent of McGraw-Hill Education.Electricity for the Trades, 3e (Petruzella) Chapter 1 Safety
1) Electric shock occurs when the body becomes part of the electric circuit.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
2) The lower the body resistance, the greater the potential electric shock hazard.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
3) A relatively small percentage of workplace accidents are associated with arc flash.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Identify arc flash hazards and prevention techniques.
Bloom's: Remember
Accessibility: Keyboard Navigation
4) An arcing fault involves current flowing through the air.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Identify arc flash hazards and prevention techniques.
Bloom's: Remember
Accessibility: Keyboard Navigation
5) An electric arc can produce temperature four times hotter than the surface of the sun.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Identify arc flash hazards and prevention techniques.
Bloom's: Remember
Accessibility: Keyboard Navigation
(Test Bank all Chapters) 1 / 4
2 Copyright © 2020 McGraw-Hill Education. All rights reserved.No reproduction or distribution without the prior written onsent of McGraw-Hill Education.6) Metal hard hats are acceptable when performing electrical work.
Answer: FALSE
Difficulty: 1 Easy
Learning Objective: Recognize principles of electrical safety and protective clothing and equipment.
Bloom's: Remember
Accessibility: Keyboard Navigation
7) Separate leather gloves are used in conjunction with rubber gloves worn to prevent the skin from contacting energized circuits.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Recognize principles of electrical safety and protective clothing and equipment.
Bloom's: Remember
Accessibility: Keyboard Navigation
8) Face shields should be worn during all electrical switching operations.
Answer: TRUE
Difficulty: 1 Easy
Learning Objective: Recognize principles of electrical safety and protective clothing and equipment.
Bloom's: Remember
Accessibility: Keyboard Navigation
9) Metal ladders are approved for use on electrical installations.
Answer: FALSE
Difficulty: 2 Medium
Learning Objective: Recognize principles of electrical safety and protective clothing and equipment.
Bloom's: Remember
Accessibility: Keyboard Navigation
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3 Copyright © 2020 McGraw-Hill Education. All rights reserved.No reproduction or distribution without the prior written onsent of McGraw-Hill Education.10) Generally, any voltage above ________ volts is considered dangerous.
- 6
- 12
- 30
D) 120
Answer: C
Difficulty: 1 Easy
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
11) Generally, any current flow through the body above ________ is considered dangerous.
- 5 milliamperes
- 1 ampere
- 5 amperes
- 15 amperes
Answer: A
Difficulty: 1 Easy
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
12) According to Ohm's law and assuming a body path resistance of 100 ohms, what amount of current would flow if a person came in contact with 120 V?
- 1.2 amperes
- 0.833 amperes
- 12 milliamperes
- 83.3 milliamperes
Answer: A
Difficulty: 2 Medium
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
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4 Copyright © 2020 McGraw-Hill Education. All rights reserved.No reproduction or distribution without the prior written onsent of McGraw-Hill Education.13) The electric shock intensity
- increases with an increase in current flow.
- increases with the length of time of exposure.
- is determined in part by the pathway the current takes through the body.
- All of the answers are correct.
Answer: D
Difficulty: 2 Medium
Learning Objective: Identify the factors that determine the severity of an electric shock.
Bloom's: Remember
Accessibility: Keyboard Navigation
14) An arc flash is the ball of fire that explodes from an electric
- series circuit.
- parallel circuit.
- short circuit.
- open circuit.
Answer: C
Difficulty: 1 Easy
Learning Objective: Identify arc flash hazards and prevention techniques.
Bloom's: Remember
Accessibility: Keyboard Navigation
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