更多"Engine operating conditions may be "的相关试题:
[单项选择]Under manoeuvring condition the main engine may run on （）.
A. gas oil
B. marine diesel oil
C. residue oil
D. crude oil
[单项选择]Low compression of diesel engine may result from （）
A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above
[单项选择]Defective timing gear in a diesel engine may lead to （）.
A. smoky exhaust
B. starting failure
C. overload
D. over speed
[单项选择]Defective governor in a diesel engine may lead to （）.
A. smoky exhaust
B. starting failure
C. ignition relay
D. over speed
[单项选择]Low compression pressure in a diesel engine may be the result of （）
A. insufficient fuel supply due to fuel pump valves sticking or leaking
B. excessive mechanical clearance between the piston crown and cylinder head
C. excessively worn fuel pump plunger
D. excessive exhaust back pressure
[单项选择]The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.
A. crack
B. knocking
C. leaking
D. seizure
[单项选择]A restricted air intake to a diesel engine may result in the engine （）.
A. failing to reach rated speed
B. knocking under maximum load
C. hunting or surging under light load
D. overspeeding and running away
[单项选择]An auxiliary diesel engine may fail to start due to（）
A. low exhaust back pressure
B. high lube oil temperature
C. insufficient cranking speed
D. excessive fuel atomization
[单项选择]Cold weather starting of a diesel engine may be made easier by（）
A. decreasing the compression ratio
B. using a special fuel having a high ignition temperature
C. increasing the starting air supply
D. heating the jacket water
[单项选择]Injection lag in a diesel engine may be caused by（）
A. a higher cetane number of fuel oil
B. the diesel fuel used having a high viscosity
C. mechanical rigidity in the lube pump mechanism
D. a decrease rigidity in the fuel pump delivery pressure
[单项选择]A diesel engine may fail to start due to （）
A. low air charge temperature
B. high cranking speed
C. excessive fuel dilution of lube oil
D. high compression pressure
[单项选择]A diesel engine may be hard to start if the （）
A. air intake is restricted
B. engine is cranked too fast
C. vibration dampener is faulty
D. exhaust back pressure is low
[单项选择]For an ordinary modem marine four-stroke engine the inlet valves close （）.
A. after TDC
B. before TDC
C. after BDC
D. before BDC
[单项选择]The indicated power of an engine can be obtained by taking the （）.
A. precautions
B. rpm
C. indicator cards
D. B and C
[单项选择]Operating conditions in the crank chamber are very （） those in the cylinder.
A. the same as
B. similar to
C. separated from
D. different from
[单项选择]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 clearance
B. Increased connecting rod bearing clearance
C. Decreased compression ratio
D. Increased compression ratio
[单项选择]Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.
A. first stage
B. second stage
C. distillate cooler
D. salt water feed heater
[单项选择]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 compressor
B. The temperature of the air entering the compressor
C. The designed rotating speed of the compressor
D. A leaking head gasket
