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單項選擇題

Which of the filter/strainer units listed permits you to clean the element while leaving the system on the line?（）

A.Simplex
B.Duplex
C.Canister
D.Bypass

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單項選擇題

A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.

A.condition of the expansion valve
B.moisture in the system
C.condition of the compressor suction valves
D.condenser temperature

單項選擇題

If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.

A.trick wheel
B.accumulator
C.standby pump
D.telemotor