As soon as a diesel engine has started...

单项选择题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

A.Exhaust temperatures
B.Raw water pressure
C.Lube oil pressure
D.Air box pressure

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1.单项选择题The connecting rod is fitted between the crosshead and the crankshaftI t transmits the firing force, and together with the crankshaft converts the （）motion to a （）motion.

A.rotary；reciprocating
B.up and down；fore and aft
C.fore and aft；up and down
D.up and down；rotary

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2.单项选择题The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the （）

A.camshaft
B.piston movement
C.exhaust valves
D.vertical drive

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3.单项选择题Valves in the cylinder head of a diesel engine are opened by the direct action of the（）

A.exhaust pressure
B.valve spring pressure
C.rocker arm movement
D.wrist pin movement

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4.单项选择题On a large diesel engine installation, crankshaft axial alignment is maintained by the （）

A.piston rod guides
B.engine thrust bearing
C.crosshead bearing
D.main shaft flexible coupling

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5.单项选择题A piston is said to be at top dead center when it is （）

A.opening the exhaust ports
B.placed on top of the engine along its centerline
C.farthest from the cylinder head
D.nearest to the cylinder head

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6.单项选择题During which of the listed piston stroke of a four-stroke/cycle diesel engine, is the piston moving downward?（）

A.Intake stroke
B.Compression stroke
C.Exhaust stroke
D.Pumping stroke

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7.单项选择题A piston is at bottom dead center when it is（）

A.opening the exhaust ports
B.closing the fuel ports
C.farthest from the cylinder head
D.nearest to the cylinder head

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8.单项选择题The average pressure exerted on piston during each power stroke is termed（）

A.indicated horsepower
B.mean effective pressure
C.exhaust back pressure
D.compression pressure

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9.单项选择题If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two-stroke/cycle diesel engine will develop approximately（）

A.the same indicated horsepower as a four-stroke/cycle engine
B.twice the indicated horsepower as a four-stroke/cycle engine
C.one half indicated horsepower as a four-stroke/cycle engine
D.one power stroke for every two crankshaft revolutions

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10.单项选择题In comparing engines of equal horsepower, higher exhaust gas temperatures occur in a/an（）

A.opposed-piston engine
B.double-acting engine
C.two-stroke/cycle engine
D.four-stroke/cycle engine

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