單項選擇題The sensing line for the low pressure cutout switch to a refrigeration system is located （）.

A.in the chill box
B.before the receiver
C.on the suction side of the compressor
D.on the discharge side of the compressor


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題Which of the following statements is true concerning any evaporator?（）

A.High conductivity of the distillate indicates distillate salinity is excessive
B.Increasing the absolute pressure of the shell will increase the distillers capacity
C.Mesh separators are used in evaporators to filter the distillate
D.Reducing the brine density will reduce the heat lost overboard

2.單項選擇題A knocking sound emitted from an unloaded air compressor is probably caused by （）.

A.damaged intake valves
B.excessively tight mounting bolts
C.insufficient cylinder lubrication
D.a loose piston

3.單項選擇題The refrigeration system low pressure cutout switch is actuated by （）.

A.an electric system manager
B.a sensing bulb at the tail coil of the evaporator
C.pressure changes in the suction line
D.failure of the king solenoid valve

4.單項選擇題Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.

A.fluid friction
B.fluid turbulence
C.component misalignment
D.pressure surges

5.單項選擇題When you adjust a thermostatic expansion valve, （）.

A.refrigerant must be bled off the sensing line before adjustments are made
B.all refrigerant must be pumped into the receiver before adjustments are made
C.time must be allowed for conditions to stabilize in the evaporator before further adjustments are made
D.all refrigerant must be routed through the dehydrator while changing the superheat setting