The main engine is cooled with fresh w...

单项选择题The main engine is cooled with fresh water （）is added suitable small quantities of chemicals to prevent corrosion.

A.in which
B.on which
C.to which
D.by which

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1.单项选择题（）during the last repair?

A.Did you have No.4 cylinder repair
B.Do you have No.4 cylinder repaired
C.Didn’t you have No.4 cylinder repairing
D.Didn’t you have No.4 cylinder repaired

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2.单项选择题Hardly had the engine started （） the temperature of the cooling water suddenly rose up to 40℃.

A.then
B.than
C.when
D.after

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3.单项选择题The term “moderate speed” was previously interpreted as meaning a speed which would enable a vessel （）within half the range of visibility.

A.stopping
B.being stopped
C.to stop
D.to be stopped

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4.单项选择题The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being （）.

A.open
B.uncover
C.covered
D.closed

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5.单项选择题Hearing a strong noise, （） at once.

A.the engine stopped
B.the engine was stopped
C.he stopped the engine
D.he had stopped the engine

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6.单项选择题（） that everything in the engine crankcase is correct, start up the crankcase lubricating oil pump.

A.To satisfy
B.To be satisfied
C.After satisfying
D.After being satisfied

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7.单项选择题Cooling （） the engine metals retain their mechanical properties.

A.forces
B.enables
C.makes
D.is able to

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8.单项选择题The data to be recorded on this sheet （） the performance of the engine.

A.makes the experts to judge
B.enables the experts to judge
C.make the experts judging
D.enable the experts to judge

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9.单项选择题To assist separation of low viscosity oils steam coils or electric heaters are fitted （） of the oily water separator.

A.in entrance
B.in exit
C.in the upper part
D.on the outside

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10.单项选择题The most suitable pump for oily water separator feed duties is （）.

A.a reciprocating pump
B.a vane pump
C.a centrifugal pump
D.a triple screw pump

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