单项选择题

Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to （）.

A.maintain adequate coil back pressure
B.prohibit flashing in the liquid line
C.reduce refrigerant volume in the system
D.reduce compressor discharge line loading

相关考题

An advantage of a helical gear pump over a simple gear ...

单项选择题An advantage of a helical gear pump over a simple gear pump is that the helical gear pump is capable of （）.

A.maintaining a steadier speed
B.delivering liquids over greater distances
C.operating for longer periods of time
D.producing a smoother discharge flow

The size of ball and roller bearings can be identified ...

单项选择题The size of ball and roller bearings can be identified by the （）.

A.rolling member size
B.inner race cone width
C.manufacturers numerical code
D.outer ring width

A centrifugal pump produces flow with a resulting disch...

单项选择题A centrifugal pump produces flow with a resulting discharge head by energy conversionIt is typical for the energy conversion to follow the order of （）.

A.mechanical energy to kinetic energy to potential energy
B.mechanical energy to potential energy to kinetic energy
C.potential energy to mechanical energy to kinetic energy
D.kinetic energy to mechanical energy to potential energy

船舶辅助机械

Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to （）.