Why is it necessary that the crankcase heater heats the compressor crankcase before starting the compressor?
What will be an ideal response?
To boil out any liquid refrigerant present in the crankcase. Otherwise, some of the liquid will reach the compressor cylinders and may cause damage.
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The mass of water in a container varies by the following relationship: dm/dt = 6.0 – 0.5 t + 0.003 t2 , where t is in seconds and m is in kg. Determine the change in mass of the water in the container during a 5 second period of time.
What will be an ideal response?
In Problem 5-5, if there are an average of 25 crashes per year on the segment proposed for improvement, and 62% of the crashes are of the type targeted by the improvement, estimate the expected number of crashes (per year) after the improvement is constructed.
What will be an ideal response?
List three items that a letter of introduction should include:
What will be an ideal response?
Hogs are efficient converters of feed to meat requiring about how many pounds of feed per pound of gain?
A. 1 B. 2 C. 3 D. 4