Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 17, Problem 2RQ
To determine
The switch for the statement, "an open motor gets up to speed, the ______switch takes the start winding out of the circuit."
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What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?
The primary winding delivers a high-voltage spark to the plugs.
The magnetic field in the coil primary builds.
The secondary voltage drops to zero volts.
High voltage is induced in the secondary windin
When a hermetic motor burns while in use,_______ are produced.
4. Describe two type of starting system principles and draw
the basic starting circuit
Chapter 17 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 17 - The two popular operating voltages for residences...Ch. 17 - Prob. 2RQCh. 17 - Is the resistance in the start winding greater or...Ch. 17 - Which of the following devices may be wired into...Ch. 17 - Prob. 5RQCh. 17 - Define BEME.Ch. 17 - Why is the hermetic compressor motor manufactured...Ch. 17 - The two types of motors used for hermetic...Ch. 17 - How does power pass through the compressor shell...Ch. 17 - The two types of relays used to start hermetic...
Ch. 17 - A PTC device is used A. to start a hermetic...Ch. 17 - True or False: Three-phase motors have low...Ch. 17 - Prob. 13RQCh. 17 - Why is it desirable to have a two-speed...Ch. 17 - True or False: All electric motors must be cooled...Ch. 17 - True or False: An SCR is an electronic switch.Ch. 17 - Prob. 17RQCh. 17 - Capacitors are used after the converter to A....Ch. 17 - The converter A. changes the frequency of the...Ch. 17 - The inverter A. adjusts the frequency. B. adjusts...Ch. 17 - Briefly describe the operation of the three...
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- An open winding in an electric motor means that A. the winding is making contact with the motor frame. B. one winding is making contact with another winding. C. a wire in one winding is broken. D. the centrifugal switch to the start winding is open.arrow_forwardWhat is the primary use of a limit switch?arrow_forwardWhat is an SPST switch?arrow_forward
- When energizing or de-energizing a combination starter what safety precaution should always be taken?arrow_forwardWhat type of float switch does not have a differential setting?arrow_forwardWhen using a rod type float switch, how is the amount float movement required to open or close the contacts adjusted?arrow_forward
- Which of the following is not part of the starter motor circuit? Battery Starting safety switch Starter motor Relay solenoidarrow_forwardWhy are the contacts of a micro switch spring loaded?arrow_forwardWhen a diac first turns on, does the voltage drop, remain at the same level, or increase to a higher level?arrow_forward
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