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 18, Problem 14RQ
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The torque of a motor is the __________________.
a. product of rotor’s tangential force and its radius
b. power given to load driven by the motor
c. electrical power
d. force in N acting on the rotor
What is the frequency (in Hz) of a motor spinning at 1740 rpm?
Q1) please answer fast need
Chapter 18 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 18 - Prob. 1RQCh. 18 - Power supply data should include the...Ch. 18 - Prob. 3RQCh. 18 - Prob. 4RQCh. 18 - Prob. 5RQCh. 18 - In the United States, the frequency in cycles per...Ch. 18 - Prob. 7RQCh. 18 - Prob. 8RQCh. 18 - An open single-phase motor with a centrifugal...Ch. 18 - Prob. 10RQ
Ch. 18 - Prob. 11RQCh. 18 - Prob. 12RQCh. 18 - Prob. 13RQCh. 18 - Prob. 14RQCh. 18 - Prob. 15RQCh. 18 - What is a matched set of belts?Ch. 18 - Name the different types of belts.Ch. 18 - Prob. 18RQCh. 18 - An instrument often used to check the alignment of...Ch. 18 - Why must resilient-mount motors have a ground...Ch. 18 - A belt-driven blower assembly is equipped with a...Ch. 18 - Prob. 22RQCh. 18 - Prob. 23RQCh. 18 - Prob. 24RQ
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- If 1 nodes are observed at a frequency of 1,500 rpm during whirling of a simply supported long slender rotating shaft, the first critical speed of the shaft in rpm is __________ (provide the answer in 0 decimal place)arrow_forwardA motor has a nameplate hp of 1 at 1736 rpm. The torque available in lb-ft is _____. (input just the number to 1 decimal placearrow_forwardThe supply frequency is 50 Hz. What will be the rotor voltage frequency if the motor speed is equal to 90% of synchronous speed. O 45 Hz. O 10 Hz. 05 Hz. O None.arrow_forward
- what is the mechanical power developed by a motor that turns at 2500 rpm and has a torque of 4 Nmarrow_forwardIf one node is observed at a frequency of 1000 RPM, during a whiring of a simply supported long slender rotating shaft. The first critical speed of the shaft in RPM is ______?arrow_forwardGive the answer with proper explanation why you chose that specific option. Thank youarrow_forward
- Q5: What kinds of Belt drives with explanation only. onearrow_forwardAssume that you are to design a 3V V-belt drive. Given that input speed as 1750 rpm and nominal output speed as 725 rpm. Starting with belt linear velocity 4000 ft/min, specify the output sheeve D2 once you specify D1 from last question. D2 = ___ in. Provide write down steps including equations.arrow_forwardGiven the information for a motor, determine its LCC in term of present worth (in $). Annual discount rate (i.e. interest rate): 10% Life time: 5 years Initial cost: $6500 Energy usage: $500/year Maintenance cost: $400/year Salvage value: $500 A 9601 B 11471 с 11068 D 12170 E 10625arrow_forward
- Define motorarrow_forwardIf the peak power of your electric motor occurs at a torque (Tm) of 0.001 Nm and you have a load (FL) of 1.2 Ibf to pull using a motor, gear box, and winch (rw-0.125 inches). What gear ratio would result in the load moving as fast as possible at equilibrium? Tm Motor Gear Tgb W Воx gb F.arrow_forwardAssume that you are to design a 3V V-belt drive. Given that input speed as 1750 rpm and nominal output speed as 725 rpm. Starting with belt linear velocity 4000 ft/min, specify the output sheeve D2 once you specify D1 from last question. D2 = ___ in. Provide write down steps including equations. *** 21.07 and 21.1 were marked incorrectarrow_forward
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