网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? （）
A
Hydraulic stress and distortion will develop
B
Hot spots will develop
C
Fuel oil viscosity will increased
D
An increase in trapped deposits of scale and dirt
参考答案
参考解析
解析：
暂无解析
更多 “单选题Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? （）A Hydraulic stress and distortion will developB Hot spots will developC Fuel oil viscosity will increasedD An increase in trapped deposits of scale and dirt” 相关考题
考题
Which of the listed conditions can be considered as the single greatest cause of accidents?A.SpeedB.Excessive knowledge or skillC.Human errorD.Excitement
考题
Which of the listed devices may be used as a digital device?A.variable resistorB.diodeC.strain gaugeD.thermistor
考题
Which of the listed classes of fire would most likely occur in the engine room of a vessel?A.Classes A and BB.Classes B and CC.Classes C and DD.Classes A and D
考题
单选题Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）A
ImpellerB
CompressorC
After-coolerD
Exhaust differ
考题
单选题If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）A
valve will open laterB
valves will close laterC
amount of fuel injected will be increasedD
amount of fuel injected will be decreased
考题
单选题Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）A
Decreased connecting rod bearing clearanceB
Increased connecting rod bearing clearanceC
Decreased compression ratioD
Increased compression ratio
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Which of the listed conditions will occur if a diesel engine exhaust valve is leaking?（）A
Loss of compression for that cylinderB
Misfiring or rough runningC
Damage to the valveD
All of the above
考题
单选题Which of the listed cylinder liner surface conditions indicates proper lubrication?（）A
Dull black appearanceB
Bright appearanceC
Thin layer of lacquerD
Thick oily film
考题
单选题Which of the listed conditions can cause lacquer to be deposited on a piston skirt?（）A
High sulphur content fuelB
High lube oil temperaturesC
High vanadium content fuelD
Excessive piston slap
考题
单选题Which of the listed conditions can be considered as the single greatest cause of accidents?（）A
SpeedB
Excessive knowledge or skillC
Human errorD
Excitement
考题
单选题As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?（）A
Compression ratioB
Fuel/Air ratioC
Compression pressureD
Lube oil pressure
考题
单选题Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）A
Classes A and BB
Classes B and CC
Classes C and DD
Classes A and D
考题
单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）A
Exhaust temperaturesB
Raw water pressureC
Lube oil pressureD
Air box pressure
考题
单选题Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）A
The density of the air entering the compressorB
The temperature of the air entering the compressorC
The designed rotating speed of the compressorD
A leaking head gasket
考题
单选题The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operating conditions?（）A
speed, torque, and horsepower productionB
firing order, valve timing, and valve liftC
fuel consumption, efficiency, and cylinder pressureD
scavenge pressure, compression ratio, and exhaust pressure
考题
单选题Which of the conditions listed represents the greatest effect of excess frost accumulation on the evaporator coils?（）A
Keeps the refrigerated space coolerB
Reduces the efficiency of the plantC
Takes the load off the compressorD
Has no affect on the system
考题
单选题Increasing the speed of a rotary pump above its rated speed will result in which of the following conditions to occur?（）A
Loss of suctionB
Increased clearancesC
Decreased clearanceD
Decreased slippage
考题
单选题（） is a precaution which contributes to avoiding trouble under normal operating conditions.A
Constant inspectionB
Keeping constant loadC
Remaining constant temperatureD
Varying speed
考题
单选题Possible phase relationships between voltage and current in an alternating current circuit include which of the following conditions?（）A
Current and voltage may be in phaseB
Current may lead the voltageC
Current may lag the voltageD
All of the above
考题
单选题Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.A
first stageB
second stageC
distillate coolerD
salt water feed heater
考题
单选题Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?（）A
At the designed operating temperature, the liquid refrigerant charge has changed to a vaporB
The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivityC
The sensing bulb is empty of liquid refrigerant charge at the designed operating temperatureD
The sensing bulb is never emptied of liquid refrigerant under normal operating conditions
考题
单选题In which of the areas listed is a fire resulting from spontaneous combustion most likely to occur?（）A
Engine room bilgesB
Paint lockerC
Battery storage lockerD
Fuel oil tank
考题
单选题A device which prints out a permanent record of the plant operating conditions is known as the （）.A
analoggerB
bell loggerC
alarm loggerD
data logger
考题
单选题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）A
Injection pressuresB
Control air supply pressureC
Cooling water flow through after-coolersD
Lube oil temperature
热门标签
最新试卷
