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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Textbook Question
Chapter 17, Problem 20RQ
The inverter
A. adjusts the frequency.
B. adjusts the DC voltage.
C. smooths out the AC power.
D. makes a lot of noise.
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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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- Describe the basic difference between a DC motor and a DC generator.arrow_forwardVoltage can be described as ____________ .arrow_forwardCapacitors are used after the converter to A. smooth out the DC current. B. suppress the noise. C. change the voltage frequency. D. reduce the voltage.arrow_forward
- Ohm's law for determining voltage is _______.arrow_forwardAn 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_forwardA rotating magnetic field inside a set of conductingwires is a simple description of a __ .a. DC generatorb. AC generatorc. voltage regulatord. none of the abovearrow_forward
- AHO LUI 3. True or false? A magnetic field opposing the stator's magnetic field is produced in a motor's rotor by a process called induced magnetism.arrow_forwardWhat is the purpose of the diodes in the generator?arrow_forwardThere is a short circuit in an electric motor winding when A. there is an adverse weather condition. B. a winding conductor is worn bare and touches anotherpart of the conductor that is also bare. C. there is a defect in the centrifugal start switch. D. the motor will not start.arrow_forward
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