更多"The diesel engine must be started b"的相关试题:
[单项选择]Before a marine diesel engine is started the cylinders and pistons must be （）.
A. cooled to appropriate temperature
B. warmed up gradually to appropriate temperature
C. opened up and renewed
D. ground and polished
[单项选择]A marine diesel engine is started by（）
A. supplying high pressure oil into a hydraulic motor
B. supplying high temperature air into the cylinder
C. supplying high pressure air into the cylinder
D. electrical igniting
[单项选择]Immediately after any diesel engine is started, the engineer should check the （）
A. crankcase pressure
B. lube oil pressure
C. saltwater pressure
D. exhaust temperature
[单项选择]If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）
A. on the power stroke
B. on the exhaust stroke
C. at the end of the power stroke
D. at the start of the intake stroke
[单项选择]As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
A. Exhaust temperatures
B. Raw water pressure
C. Lube oil pressure
D. Air box pressure
[单项选择]Before starting an engine by air, the engine must（）
A. be turned by a turning gear for at least one minute
B. be turned by a turning gear for at least two minutes
C. be turned at least one complete turn
D. be turned at least two complete turns
[单项选择]The minimum speed an engine must attain before ignition can occur depends upon （）.
A. the type and size of the engine
B. the condition of the engine
C. ambient temperature
D. all of the above
[单项选择]Diesel engine lube oil can become contaminated as a result（）
A. the water produced during combustion
B. the sulfur in the fuel
C. unburned fuel oil
D. all of the above
[单项选择]A diesel engine piston crown can crack from （）
A. excessive piston to liner clearance
B. excessive dirt beneath the piston crown that reduces heat transfer
C. faulty nozzle spray
D. all of the above
[单项选择]Diesel engine piston seizure can be caused by （）
A. poor cooling of cylinder walls
B. improper cooling of the piston
C. insufficient piston lubrication
D. all of the above
[单项选择]Diesel engine exhaust noise can be reduced in an exhaust muffler by （）
A. changing the direction of exhaust gas flow
B. increasing the exhaust gas velocity
C. changing the exhaust gas weight
D. increasing the exhaust gas static pressure
[单项选择]A diesel engine cylinder head can crack as a result of （）
A. a leaking seal ring
B. heat transfer from exhaust valves
C. restricted cooling passages
D. overheated intake valves
[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]（）, the engine must be stopped immediately.
A. Should knocking occur
B. If knocking occur
C. Should if knocking occurs
D. If occur knocking
[单项选择]If a scavenge fire starts, the engine must be put to “（）” and the fuel must be taken off the cylinders affected by the fire.
A. stop engine
B. finished with engine
C. dead slow ahead
D. dead slow astern
[单项选择]Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A. open the bypass line
B. cut in the lube oil cooler
C. pressurize the lube oil system
D. top off the expansion tank
[单项选择]The bridge should inform the engine room before passing through congested or shallow waterway（）
A. 24 hours
B. 2 hours
C. 1 hours
D. 15 minutes
[单项选择]Before welding can be done in a tank that has carried petroleum products, a certificate must be obtained from（）.
A. the customs
B. the register bureau of shipping
C. the shipyard fire department
D. a certified gas chemist
