Fish can’t live w（） water.

When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water _____.

A:to cut down the amount of cooling water needed B:to prevent an excess amount of cooling water from being discharged to the bilges C:to supply hot water to the evaporator for more economical operation D:None of the above is tree

An oil water monitor is required in order to measure _____.

A:the oil content in water B:the water content in fuel oil C:the water level in bilge well D:the oil level in bilge well

An oil in water monitor is required in order to measure _____.

A:the oil content in water B:the water content in fuel oil C:the water level in bilge well D:the oil level in bilge well

Seawater may be used for drinking water _____.

A:at a maximum rate of two ounces per day B:after mixing with an equal quantity of fresh water C:if gather during or immediately after a hard rain D:under no circumstance

Drinking salt water will .

A:be safe if mixed with fresh water B:prevent seasickness C:promote urine excretion D:protect against heat cramps

Water accumulation in the cylinder of a secured engine is an indication that the _______.

A:soft water pump was not secured along with the engine B:jacket water thermostat has failed C:cylinder liner may be cracked D:raw water pump is over-speeding just prior to engine shutdown

Before the oily water separator put into operation, it should be ____.

A:filled with bilge water B:filled with oil C:filled with clean water D:be emptied

What often happens when using echo-sounder at river estuary where a layer of fresh water lies on the top of denser salt water?

A:A scattering layer appears. B:Echo sounder stops working. C:shallow water appears. D:Nothing abnormal happens."