海船船员考试
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
题目
Faulty thermostatic bypass valve
Eroded zinc pencils in the heat exchanger
Steam formation in the expansion tank
Excessive leakage from jacket water pump seal
相似问题和答案
第1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 valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seals
第2题：
increasing the quantity of starting air
increasing the lube oil pressure
heating the engine fuel supply
heating the engine jacket water
第3题：
A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).
A.reduce heat radiation to the engine room
B.aid in preventing turbocharger overheating
C.condense and drain moisture from exhaust gases
D.dampen exhaust gas pulsations in the manifold
解析：water jacket：水套;exhaust manifold：排气总管;heat radiation：热辐射;condense and drain moisture from exhaust gases:将水分从排气中冷凝析出;dampen exhaust gas pulsations in the manifold：缓解排气总管中的废气脉动
译文：环绕排气总管的水套是为了减少对机舱的热辐射。
第4题：
cooling water leaving each cylinder
fuel oil entering the injector
exhaust gases at various locations
lube oil at the bearing supplies
第5题：
reduce heat radiation to the engine room
aid in preventing turbocharger overheating
condense and drain moisture from exhaust gases
dampen exhaust gas pulsations in the manifold
第6题：
stop the engine immediately to prevent damage
increase lube oil pressure
slow the engine allowing it to gradually cool
decrease the cooling water it temperature to the water jacket
第7题：
excessive crankcase pressure
excessive lube oil temperature
contamination of the lube oil by water
contamination of the cooling water by lube oil
第8题：
If an auxiliary diesel engine coolant 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 jackets
B.excess corrosion inhibitor in the coolant
C.dirty jacket water cooler
D.defective turbocharger
第9题：
Increase the cooling water flow to the engine
Secure or reduce fuel to that cylinder
Screw down on the pressure adjusting spring to decrease to decrease popping pressure
Readjust the injection timing
第10题：
an overfilled expansion tank
excess chromate treatment of the jacket water
a clogged raw water sea suction
cavitation erosion of the heat exchanger tubes