Electricity for the Trades
3rd Edition
ISBN: 9781260437386
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 1.1, Problem 1RQ
Does the severity of an electric shock increase or decrease with each of the following changes?
- a. A decrease in the source voltage.
- b. An increase in body current flow.
- c. An increase in body resistance.
- d. A decrease in the length of time of exposure.
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Questions:
1. Are the experimental and theoretical values of voltages and currents match? Indicate
the percentage of differences.
2. Give possible reasons for any discrepancies
Could you answer please?
Q.2
- a. Calculate the theoretical body current flow (in amperes and milliamperes) of an electric shock victim
who comes in contact with a 220 Volt energy source. Assume a total resistance of 11,200 Q (skin, body, and
ground contacts).
b. What effect, if any, would this amount of current likely have on the body? Explain in detail.
Chapter 1 Solutions
Electricity for the Trades
Ch. 1.1 - Does the severity of an electric shock increase or...Ch. 1.1 - In general, voltage levels above what value are...Ch. 1.1 - In general, current levels above what value are...Ch. 1.1 - What circuit fault can result in an arc flash?Ch. 1.1 - Define each of the following terms associated with...Ch. 1.1 - Explain why an arc flash is so potentially...Ch. 1.1 - What is a permit-required confined space?Ch. 1.1 - What does the term personal protective equipment...Ch. 1.1 - What personal protective attire is required when...Ch. 1.1 - When should face shields be worn?
Ch. 1.1 - A fall arrest system must be rigged so that...Ch. 1.1 - A ladder is used to reach the top of a building 16...Ch. 1.1 - What are the deck requirements for a scaffold work...Ch. 1.1 - Prob. 14RQCh. 1.1 - List the three ingredients required to sustain a...Ch. 1.1 - Which classes of fire are multipurpose...Ch. 1.1 - List four hazardous properties or characteristics.Ch. 1.2 - Prob. 1RQCh. 1.2 - Compare the terms grounding and bonding.Ch. 1.2 - Why is the earth not considered to be an effective...Ch. 1.2 - Explain what is meant by a ground fault.Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - Explain what is meant by an arcing fault.Ch. 1.2 - Compare the amount of current that results from...Ch. 1.2 - Compare what GFCIs and AFCIs protect against.Ch. 1.2 - What does a lockout-tagout procedure refer to?Ch. 1.2 - Prob. 11RQCh. 1.2 - A voltmeter is used to verify that no voltage is...Ch. 1.2 - What is the main goal of OSHA?Ch. 1.2 - What is the primary purpose of the rules set forth...Ch. 1.2 - Assume a piece of electrical equipment has been...Ch. 1.2 - How often is the National Electrical Code updated...
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