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单选题
If a diesel engine rotates slowly when cranked, but does not fire, the（）
A
fuel control rack had admitted excessive fuel
B
engine speed does not match the fuel rack setting
C
engine has failed to reach its firing speed
D
starter pinion and ring gear contact is not correct
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单选题In a four-stroke engine the camshaft rotates at （）.A
half the engine speedB
twice the engine speedC
the engine speedD
four times the engine speed
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单选题The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is（）.A
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normal for these conditions
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单选题When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）A
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单选题When fuel is injected late into a diesel engine cylinder,（）.A
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start the fire pumpC
put on lifejackets and go to their abandon ship stationsD
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单选题Trunk type diesel engine pistons are effectively cooled when heat is（）A
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考题
单选题A diesel engine may be hard to start if the （）A
air intake is restrictedB
engine is cranked too fastC
vibration dampener is faultyD
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单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A
Bed plateB
ColumnC
EntablatureD
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单选题What does a pyrometer measure on a diesel engine? （）A
Water temperatureB
Water pressureC
Exhaust temperatureD
Air box pressure
考题
单选题How does combustion air enter the cylinder of a two-cycle diesel engine?（）A
Cylinder head valvesB
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考题
单选题If a diesel engine rotates slowly when cranked, but does not fire, the（）A
fuel control rack had admitted excessive fuelB
engine speed does not match the fuel rack settingC
engine has failed to reach its firing speedD
starter pinion and ring gear contact is not correct
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ensure engine vibrations correspond to the natural frequency of the hullC
permit the engine to expand away from the driven equipment as the engine heats up and expandsD
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gap clearanceC
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考题
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BDCD
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考题
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use a higher than normal cranking speedC
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考题
单选题In a four-stroke engines the camshaft rotates at （）.A
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考题
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a speed independent of that of the crankshaft
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