单项选择题（） may be the first possible cause which makes the engine to lose power or slow down when it is running.

A.Hot bearing 
B.Starting valves
C.Unequal distribution of load
D.Excessive crankshaft clearance

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1.单项选择题（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.

A.The fuel oil
B.The lube oil
C.The sea water
D.The fresh water

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2.单项选择题（） is the removal of exhaust gases by blowing in fresh air.

A.Gas exchange
B.Charging
C.Scavenging
D.Supercharging

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3.单项选择题（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.

A.Diesel oil
B.Hydraulic oil
C.Lube oil
D.Mineral oil

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4.单项选择题（） fuel oils （） lubricating oils require treatment before passing to the engine.

A.Both；and
B.Neither；nor
C.Either；or
D.Both；or

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5.单项选择题（） device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.

A.An automatic
B.A transmission
C.A self-regulating
D.An interlocking

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6.单项选择题（） are generally formed in the frame of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.

A.Doors
B.Aspirate gauzer
C.Coupling
D.Blind

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7.单项选择题（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.

A.Bulbs
B.Bulks
C.Flyweights
D.Flywheels

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8.单项选择题A （）is the foundation of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.

A．Frame
B．Bedplate
C．Cylinder
D．Liner

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9.单项选择题“Stand by an engine” means （）

A.“prepare to stop the engine”
B. “assemble an engine on its bedplate”
C. “make an engine ready for starting”
D. “dismantle an engine”

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10.单项选择题“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）

A．by using of fresh water
B．with compressed air
C．by using of sea water
D．with chemical compound

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To determine if the lube oil filter elements need changing, （）.

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White smoke exhausting from an operating diesel engine may indicate （）.

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An automated diesel engine should normally shut down due to （）

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