Lab Manual for Smith's Electricity for Refrigeration, Heating, and Air Conditioning, 9th
9th Edition
ISBN: 9781285180014
Author: Russell E. Smith
Publisher: Cengage Learning
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Question
Chapter 1, Problem 6RQ
To determine
The dangerous condition from the given options that cause serious injury.
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Students have asked these similar questions
Higher pairs are those which have
Choose the correct option
Surface contact between elements
Point or line contact between elements
None of the mentioned
No contact between elements
Which of the following property the insulating
material should possess to ensure gripping the
cable?
O High insulation resistance properties
O Good Mechanical properties
O High conductivity properties
High dielectric strength properties
Which of the following is the purpose of fail-safe circuits?
O Fail-safe circuits are designed to protect electric motors against voltage surge
O All of these are true
O Fail-safe circuits are designed to provide overload protection for system components
O Fail-safe circuits are designed to maintain constant current in electric motor coils
Chapter 1 Solutions
Lab Manual for Smith's Electricity for Refrigeration, Heating, and Air Conditioning, 9th
Ch. 1 - True or False: A heating and air-conditioning...Ch. 1 - What is a live electrical circuit?Ch. 1 - Which of the following voltages will a...Ch. 1 - Electrical shock occurs when a person _________....Ch. 1 - What are the important elements of electrical...Ch. 1 - Prob. 6RQCh. 1 - Which of the following is the standard by which...Ch. 1 - Prob. 8RQCh. 1 - What type of ladder should the technician use on...Ch. 1 - What precautions should be taken when you see a...
Ch. 1 - True or False: It is recommended that at least one...Ch. 1 - True or False: The correct fuse size for an...Ch. 1 - What is the difference between a two-prong plug...Ch. 1 - Which prong on a three-prong plug is the ground?...Ch. 1 - True or False: A grounding adapter does no good if...Ch. 1 - An electrical device that will open an electrical...Ch. 1 - True or False: Receptacles used on the job site...Ch. 1 - What precautions should you use when working in an...Ch. 1 - What is the difference between a fuse and a...Ch. 1 - List at least five electrical safety rules that...
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- While discussing copper wire: Technician A says that if the length of wire is doubled, the resistance between the wire ends is doubled. Technician B says that if the diameter of a wire is doubled, the resistance between the wire ends is doubled. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhat is the device that consists of two unlike metal strips that are attached and have a different rate of expansion and contraction? A. Thermistor B. Thermocouple C. Diaphragm D. Bimetalarrow_forwardWhile measuring the resistance of a wire with an ohmmeter: Technician A says that if low resistance is shown on the meter, the wire is shorted. Technician B says that if no resistance is measured, the wire is shorted. Who is correct? Technician A Technician B Both A and B d. Neither A nor Barrow_forward
- True or False: When troubleshooting a small system, the first step is to attach the high- and low-pressure gauges.arrow_forwardWhich of the following is a device consisting of two unlike metals fastened at one end that, when heated on the fastened end, produces a DC current? A. Thermocouple B. Thermistor C. Diaphragm D. Bimetalarrow_forwardThe type of hazard whereby sparks are generated electrically is called: Explosion contact fires strain.arrow_forward
- Which of the following statements best defines the term evacuation? A process in which the refrigerant in a system is released. A condition that exists when a compressor runs until there is no refrigerant left in the system. The process that pulls all traces of air and moisture from the system. A process that uses air to force moisture and dirt out of the system.arrow_forwardWhile diagnosing the location of a wire-to-wire short: Technician A checks the wiring of the affected circuits for signs of burned insulation and melted conductors. Technician B checks common connectors shared by the two affected circuits. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTrue or False? A lab scope is a visual voltmeter that shows voltage over a period of time.arrow_forward
- While discussing electrical grounds: Technician A says that a component may be grounded through its mounting to a major metal part. Technician B says that some components must be grounded by connecting its positive terminal to a metal section of the frame. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTo determine the maximum speed of a vehicle in a specific situation, it is necessary to determine the to movement of a vehicle. Elevation resistance Grade resistance Rolling resistance Total resistancearrow_forwardThe circuit breaker at a power seat motor continuously trips: Technician A says that this could be caused by a seat track problem that is causing mechanical resistance. Technician B says that this could be caused by corrosion at the motor, which is causing electrical re-sistance. Who is correct?arrow_forward
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