单项选择题

In a refrigeration system, if the cooling water to the condenser fails, the（）.

A.box temperature solenoid valve will close
B.expansion valve will close
C.compressor will shutdown
D.king valve will open

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Accidental flooding of the engine room bilges by the bilge main is prevented by （）.

A.stop-check valves installed in the bilge manifolds
B.using a positive displacement reciprocating bilge pump
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D.installing a swing check before each bilge valve

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A.liquid strainer
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