A. braking for the motor.
Engineering, 18.03.2020 00:04 XxpinkgothicxX
2. An inductor can be placed in series with a motor to provide
A. braking for the motor.
B. heat reduction in the motor windings.
C. less current feedback to the driver.
D. faster motor response to driver signals.
Answers: 3
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The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite
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Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?
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Engineering, 04.07.2019 18:20
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.
Answers: 2
Engineering, 04.07.2019 19:10
Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.
Answers: 2
2. An inductor can be placed in series with a motor to provide
A. braking for the motor.
A. braking for the motor.
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