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单选题
The total starting air capacity required for reversible main engines is to be sufficient for at least （）.
A
six consecutive starts
B
eight consecutive starts
C
ten consecutive starts
D
twelve consecutive starts
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单选题Which of the following may cause that an engine doesnt turn on starting air?（）A
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increase in lube oil viscosityC
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单选题Which of the following may lead to the engine NOT to start on air?（）A
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three of the six starting valves stuckD
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Holding the valve open for a long periodB
Increasing the starting air pressure usedC
Opening the stating air valve quicklyD
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单选题A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）A
low lube oil temperatureB
low starting air temperatureC
air bubbles in the fuel oil systemD
water in the starting air system
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单选题The engine will fail to start unless （）.A
the pressure of the starting air is high enoughB
there is enough air in the air reservoirsC
the air is supplied into the cylinders in the appropriate sequenceD
all of the above
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too low starting air pressureB
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单选题The pressure of pilot air is usually （） than that of starting air.A
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lowerC
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单选题The primary task of the compressed air system is to deliver the starting air necessary for （）A
starting the MEB
starting the emergency electric alternatorC
driving the main turbineD
driving the turbocharger
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单选题Reduced voltage applied to a motor during the starting period will （）.A
result in decreased acceleration time onlyB
lower the starting current and increase accelerating timeC
cause a greater starting torqueD
increase the starting current and pump capacity
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单选题Starting air for auxiliary engines may be taken directly from the main reservoirs or through （）.A
an auxiliary reservoirB
a controlling air bottleC
an emergency air compressorD
a main air compressor
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单选题After finished the engine, which of valves cannot be shut off by the duty engineer?（）A
fuel valveB
the starting air valveC
the sea chestD
the main sea pump inlet valve
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单选题Pump up the starting air reservoirs to their maximum pressure and （）the air reservoirs and air system.A
openB
closeC
drainD
vent
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water accumulation in some engine cylindersC
low starting air pressureD
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单选题When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.A
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nearlyC
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单选题When the diesel is stopped, which of the following items is wrong?（）A
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the main engine is stand-byC
shut off the starting air bottle outlet valveD
pay attention to the changes of the system parameters
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单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
noise coming from that air starting valveB
continuous operation of the starting air compressorC
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单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.A
two fuel oil transfer pumps provided where one is to be independent of the main engineB
two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineC
engine driven transfer pumps and only used in constant speed applicationsD
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考题
单选题Which of the routine maintenance procedure listed is required for starting air receivers?（）A
Frequent draining of accumulated moistureB
Frequent testing of relief valvesC
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单选题Which of the routine maintenance procedures listed is required for starting air receivers?（）A
over-speedingB
overloadC
low exhaust temperatureD
high crankcase pressure
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单选题Explosions do occur （） caused by the ignition of oil or vapour gaining access from compressors or defective engine starting valves.A
in boiler drumsB
in refrigerating plantsC
in starting air pipesD
in air coolers
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