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单选题
Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?（）
A
To prevent internal damage form local overheating
B
To ensure the fuel nozzles are flushed clean
C
To clear the smoke stack
D
To let the waste heat boiler reduce its rate of steam generation
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更多 “单选题Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?（）A To prevent internal damage form local overheatingB To ensure the fuel nozzles are flushed cleanC To clear the smoke stackD To let the waste heat boiler reduce its rate of steam generation” 相关考题
考题
The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler()
A.salinity is abnormallyB.high steam demand is tooC.feed-water flow is lowD.water level is abnormally low
考题
For most diesel propulsion and generator engines, the over-speed trip device will stop the engine byA.moving the governor control to stopB.shutting off the lubricating oil supplyC.tripping the governor emergency stop leverD.shutting off the fuel supply
考题
The main propulsion diesel continues running after you try to shut down. You should now attempt to .A.stop the fuel oil booster pumpB.engage the jacking gearC.secure the lube oil pumpD.shut off the fuel at the settling tank
考题
Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.A.open the indicator cocksB.supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C.put the fuel handle in the "stop" positionD.pump up the air bottle
考题
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.A.increase the fuel oil temperatureB.decrease the fuel oil temperatureC.decrease the fuel oil supply pressureD.increase the air supply
考题
While off-loading from an offshore supply vessel with the crane，the wind increases in strength and changes direction significantly，you should ______．A.Expedite off-loadingB.Stop off-loading，but keep the offshore supply vessel in the present locationC.Continue off-loading with no changesD.Move the offshore supply vessel to the downwind side
考题
If you are unable to stop a diesel engine by any other means，you should ______．A.Discharge a CO2 extinguisher in the air inletB.Pull off the distributor capC.Secure the jacket waterD.Secure the starting air supply valve
考题
Before switching on gyro-compass, you should make sure that the power supply on board is_______.A.high or lowB.AC or DCC.srong or weakD.on or off
考题
Foam extinguishes a fire by ______.A.shutting off the air supplyB.cooling the fuel to below ignition temperatureC.dispersing the fuelD.removing the source of ignition
考题
A server has been intermittently shutting off. The power going to the server was tested and is giving the appropriate voltages. Which of the following tools would be used to test the power supply？（）A、 POST diagnostic cardB、 OTDRC、 TDRD、 Multimeter
考题
单选题If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.A
close the static leg filling valveB
close the overflow tank falling valveC
reduce the fuel oil pumping rateD
stop the fuel oil pumping operation
考题
单选题Before hydraulic starting of an engine on a covered lifeboat，what need NOT be checked?（）A
Fuel supply line valveB
Pressure registered on the accumulator gaugeC
Cold-spark voltage readings test lampD
Engine stop control
考题
单选题In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）A
the burning of the fuel； medium shaftB
fuel spray； fresh airC
fuel； fuel sprayD
the burning of the fuel； the burned gas mixture
考题
单选题A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.A
Batten down the engine roomB
start the fire pumpC
apply carbon dioxide to the fireD
shut off the fuel supply
考题
单选题For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by （）A
moving the governor control to stopB
shutting off the lubricating oil supplyC
tripping the governor emergency stop leverD
shutting off the fuel supply
考题
单选题The over-speed trip installed on most diesel engine will stop the engine by shutting off the （）A
water supplyB
fuel oil supplyC
lube oil supplyD
exhaust damper
考题
单选题If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST （）.A
secure the ventilationB
find a soda acid extinguisherC
shut off the fuel oil supplyD
secure the generator
考题
单选题If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）A
Move the fuel control mechanism to the no fuel positionB
Block the fuel supply by closing the master fuel valveC
Shut off the fuel supply and block the flow of intake airD
Relieve all pressure in the fuel system
考题
单选题When an auxiliary boiler is panting and emitting black smoke, you should （）.A
increase the fuel oil temperatureB
decrease the fuel oil temperatureC
decrease the fuel oil supply pressureD
increase the air supply
考题
单选题If you are unable to stop a diesel engine by any other means，you should（）.A
discharge a CO2 extinguisher in the air inletB
pull off the distributor capC
secure the jacket waterD
secure the starting air supply valve
考题
单选题The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）A
centrifugal separators; the engine cylinderB
oily water separators; the engine cylinderC
oily water separators; the fuel supply systemD
centrifuges; the fuel supply system
考题
单选题Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.A
increasing the volume of intake airB
shutting off the fuel supplyC
increasing the engine back pressureD
over-speeding the engine
考题
单选题Which one is not the normal operation for boiler shutdown?（）A
Carry out soot blowing if permissibleB
Change fuel supply to diesel oilC
Close steam stop valves on boiler when pressure is reducedD
Drain boiler empty when it has cooled down
考题
单选题The flame safeguard control system of a large automatic auxiliary boiler will provide fuel shut off in the case of high （）.A
waterB
voltageC
fuel pressureD
steam pressure
考题
单选题A server has been intermittently shutting off. The power going to the server was tested and is giving the appropriate voltages. Which of the following tools would be used to test the power supply？（）A
POST diagnostic cardB
OTDRC
TDRD
Multimeter
考题
单选题When an engine is starting and has got a sufficiently high speed, say about 20 rpm,（）A
the starting air supply is cut off and fuel is injected into the cylindersB
the fuel feeding is cut off and the turning gear is put inC
the starting air supply is cut off and turning gear is taken outD
the electric blower is shut down and fuel is injected into the cylinders
考题
单选题Before switching on gyro-compass，you should make sure that the power supply on board is（）.A
high or lowB
AC or DCC
strong or weakD
on or off
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