An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor?
A. 60
B. 118
C. 122
D. 240
Answer: A
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You are a well-paid engineer with a well-established international corporation. In planning for your retirement, you are optimistic and expect to make an investment of $10,000 in year 1 and increase this amount by 10% each year. How long will it take for your account to have a future worth of $2,000,000 at a rate of return of 7% per year?
What will be an ideal response?
If an air-cooled condenser is located on a 95°F roof and the condenser saturation temperature is 150°F, which of the following is a possible scenario?
A. The system is overcharged. B. The condenser is clogged. C. The system is undercharged. D. Both a and b are correct.
Determine the refrigeration effect of the following system. The liquid entering the evaporator has an enthalpy of 64 Btu/lb and the vapor leaving the evaporator has an enthalpy of 121 Btu/lb
What will be an ideal response?
Why are the stubs on compressors and filter driers more difficult to braze than copper pipe?
A) They have a thin copper coating that is easily oxidized by overheating. B) They are difficult to get to. C) They are typically made of aluminum which is much harder to braze. D) It is easy to burn a hole in the compressor or drier shell.