Two basic connections for a defrost timer are: the ____ and the cumulative compressor run timer.
a. electromechanical timer
b. thermal timer
c. continuous run timer
d. countdown timer
c. continuous run timer
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Two kilograms of carbon dioxide expand in a cylinder at a constant temperature of 24ºC from a pressure of 800 kPa to 100 kPa. Assuming a quasi-equilibrium process, the required heat transfer is nearest:
A) 401 kJ B) 354 kJ C) 267 kJ D) 233 kJ
Technician A says the oil rings account for 60% of total drag on the cylinder wall. Technician B says the compression rings account for 40% of total drag on the cylinder wall. Who is right?
A. Technician A B. Technician B C. Both technicians D. Neither technician
What type of oil pressure safety switch is used on many semi-hermetic compressors?
a. Fixed input b. Differential pressure c. Dynamic pressure d. Bypass pressure
If the full-load motor speed of 1,800 rpm is increased to 2,000 rpm when the load is removed, its speed regulation is what percent?.
What will be an ideal response?