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单选题
Immediately after starting a diesel engine, normal raw water and jacket water pressure are indicatedHowever, the jacket water temperature continues to rise, if there is no change in the sea temperature, you should suspect（）
A
overloading in all cylinders
B
a jammed three-way thermostatic valve
C
chromate PH too low
D
a high level in the surge tank
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更多 “单选题Immediately after starting a diesel engine, normal raw water and jacket water pressure are indicatedHowever, the jacket water temperature continues to rise, if there is no change in the sea temperature, you should suspect（）A overloading in all cylindersB a jammed three-way thermostatic valveC chromate PH too lowD a high level in the surge tank” 相关考题
考题
The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals
考题
If a diesel engine turned over freely but failed to start, the cause could be ________.A.water in the fuelB.cold lube oilC.excessive starting air pressureD.excessive fuel pressure
考题
Immediately after any diesel engine is started, the engineer should check the ______.A.crankcase pressureB.lube oil pressureC.saltwater pressureD.exhaust temperature
考题
单选题If a diesel engine were running at 20% overload with a smoky exhaust, you should（）A
stop the engine immediately to prevent damageB
increase lube oil pressureC
slow the engine allowing it to gradually coolD
decrease the cooling water it temperature to the water jacket
考题
单选题During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）A
notify the duty officer, reduce the engine speed, take some measures to remove failuresB
notify the duty officer and stop the engine immediately, find the cause and remove failuresC
notify the C/ED
notify the captain
考题
单选题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）A
low lube oil temperatureB
low starting air temperatureC
air in the fuel injectionD
water in the starting air system
考题
单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）A
increasing the quantity of starting airB
increasing the lube oil pressureC
heating the engine fuel supplyD
heating the engine jacket water
考题
单选题The main purpose of starting the diesel engine on air briefly is（）A
to inspect if the cylinder has the water leakageB
to expel out the residual water/gas/oil from the cylinderC
to check if fuel supply is normalD
A and B
考题
单选题If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to （）.A
an overfilled expansion tankB
excess chromate treatment of the jacket waterC
a clogged raw water sea suctionD
cavitation erosion of the heat exchanger tubes
考题
单选题If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is （）A
air binding of the engine cooling systemB
a cracked water cooled exhaust manifoldC
blockage in the heat exchangerD
faulty operation of the thermostat
考题
单选题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）A
increase in starting air pressureB
increase in lube oil viscosityC
compression expansion deviceD
jacket water heater
考题
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
考题
单选题The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）A
Faulty thermostatic bypass valveB
Eroded zinc pencils in the heat exchangerC
Steam formation in the expansion tankD
Excessive leakage from jacket water pump seal
考题
单选题Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）A
Exhaust temperatureB
Lube oil levelC
Lube oil pressureD
Water level in the expansion tank
考题
单选题Higher than normal jacket water temperatures occurring in all cylinders of a diesel engine can result from a/an （）.A
oil suction line restrictionB
correct amount of coolantC
cavitation erosion in the water jacketsD
clogged sea suction strainer
考题
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
考题
单选题Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）A
Faulty turbocharger turbine diffuser ringB
Faulty turbocharger compressor ringC
Insufficient cooling water flowD
Clogged air intake filters
考题
单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）A
excessive fuel pressureB
high lube oil viscosityC
inadequate fuel injectionD
excessive starting air pressure
考题
单选题Cold weather starting of a diesel engine may be made easier by（）A
decreasing the compression ratioB
using a special fuel having a high ignition temperatureC
increasing the starting air supplyD
heating the jacket water
考题
单选题If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.A
loss of suction in the circulating pumpB
leak in the primary cooling systemC
broken raw water pump shaftD
burned or cracked piston in one cylinder
考题
单选题If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an （）A
cavitation erosion in the water jacketsB
excess corrosion inhibitor in the coolantC
dirty jacket water coolerD
defective turbocharger
考题
单选题A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）A
Hydraulic startingB
Electric startingC
IgnitionD
Fuel
考题
单选题Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）A
Excessive piston blow-by to the manifoldB
Insufficient cooling water flowC
Accumulated water in the air boxesD
Clogged air intake filters
考题
单选题If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST （）A
place standby cooler in operationB
reduce engine loadC
check thermostatic valveD
clean sea water strainer
考题
单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）A
increase the starting air pressureB
use a higher than normal cranking speedC
increase the fuel injection pressureD
use a fuel having a lower ignition temperature
考题
单选题Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）A
Air will enter the cooling systemB
Carbon will plug the water cooled exhaust manifoldsC
The jacket water temperature will riseD
The lube oil viscosity will increase
考题
单选题If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）A
Open the crankcase immediately to check for damageB
Apply fire fighting water through the crankcase breatherC
Allow the engine to cool before opening the crankcaseD
Assume that there is no damage to the crankshaft
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