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单选题
Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in （）
A
an air bound fuel system
B
damage to cylinder heads and pistons
C
excessive fuel injection
D
excessive air valve lift
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单选题If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）A
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单选题Diesel engine cylinder head test cocks are used to（）A
check cylinder lubrication prior to starting engineB
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pressure test cylinder heads to check for leaksD
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单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）A
Holding the valve open for a long periodB
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单选题A dark exhaust from a running diesel engine can be caused by （）A
late ignitionB
water in the fuelC
high compression temperatureD
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单选题Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）A
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单选题Diesel engine control can be obtained by the bridge （）.A
at any timeB
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单选题Small crack in the crankshaft bearing surface of a diesel engine are an indication of（）A
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insufficient lubricationC
abnormal wearD
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单选题Immediately after any diesel engine is started, the engineer should check the （）A
crankcase pressureB
lube oil pressureC
saltwater pressureD
exhaust temperature
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单选题If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will （）A
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open late and close lateC
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fail to open at normal operating temperature
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单选题Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）A
later and close soonerB
sooner and close laterC
sooner and close soonerD
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单选题Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）A
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check the compressionD
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单选题Main diesel engine control can be obtained by the bridge （）A
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单选题If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）A
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increase crank case scavenge air to remove unburned gases
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单选题A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）A
turbocharger malfunction or failureB
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单选题When fuel enters the crankcase of a diesel engine, it （）A
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单选题Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）A
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单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
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单选题Diesel engine cylinder head test cocks are used to （）A
check cylinder lubricationB
connect the pressure indicator pressureC
test cylinder headsD
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单选题In a turbocharged four-stroke/cycle diesel engine, the exhaust valve remains open until after top dead center and the intake valve opens before top dead center to（）.A
produce a scavenging effect in the combustion spaceB
equalize cylinder and exhaust manifold pressuresC
alleviate the difference in valve size between the intake and exhaustD
flush out condensate that collects after each compression stroke
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