单项选择题

What term describes a three-strand rope laid up right- or left-handed（）.

A.Soft-laid
B.Hard-laid
C.Sennet-laid
D.Hawser-laid

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单项选择题

What is NOT a function of the steam drum of a marine water-tube boiler（）.

A.Receives saturated steam from the generating tubes
B.Serves as a reservoir of boiler feed water
C.Holds internal fittings for separation of moisture from steam
D.Collects steam exhausted from the turbines

单项选择题

To find the cause of a gasoline engine’s failure to start，you should（）.

A.Break the joint in the fuel line at the engine and let the gas run in the bilges
B.Disconnect the wires at the spark plugs and make the spark jump the gap
C.Prime the engine with ether through spark plug openings
D.Ventilate the space，then check the battery，spark plugs，carburetor，and fuel line

单项选择题

The three conditions which cause engine shutdown are overspeed，low lube oil pressure，and（）.

A.High lube oil pressure
B.High jacket water pressure
C.High jacket water temperature
D.Low jacket water pressure