更多"While engine is in operation the pi"的相关试题:
[单项选择]The piston moves up and down, thus causing the rotational movement of the（）
A. crankshaft
B. connecting rod
C. cross-head
D. main beating
[单项选择]As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.
A. being compressed
B. to be pumped up
C. is pressurized
D. are built up
[单项选择]The piston moving up and down keeps the crankshaft （）.
A. to revolve
B. revolved
C. revolving
D. to be revolved
[单项选择]For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.
A. changing filter elements would not interrupt engine operation
B. filtering occurs twice in each pass of oil through the system
C. clogging will not occur
D. dropping pressure is half of that through a single filter unit
[单项选择]The satisfactory operation of diesel engine exhaust valves usually depends on（）
A. the proper back pressure
B. the cooling water temperature
C. correct timing and proper seating
D. accurate metering and the exhaust temperature
[单项选择]The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.
A. repeatedly
B. quickly
C. gradually
D. immediately
[单项选择]Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.
A. water in the fuel oil supply
B. excessive fuel nozzle holder cooling
C. a distorted fuel spray pattern
D. leakage past the plunger into the oil drain
[单项选择]The successful operation of any engine or machine and （） depend on effective lubrication.
A. their no trouble period
B. their freely trouble period
C. its free trouble life
D. its trouble-free life
[单项选择]The energy for pushing this piston up can be supplied from （）, so that the piston can keep moving up and down.
A. the same piston
B. the piston nearby
C. the other pistons
D. the generators on board
[单项选择]Proper operation of the main engine reduction gear set requires the operation to monitor （）
A. the sump oil level
B. oil flow sight glasses
C. bearing temperatures
D. all of the above
[单项选择]In describing basic diesel engine operation，the term ‘event’ refers to （）
A. the production of high pressure gases
B. the removal of expended combustion gases
C. the admission of air to the cylinder
D. all of the above
[单项选择]In describing engine operation, what does the term “cycle” mean?（）
A. The sequence of events that produce a power pulse
B. One rotation of the engine crankshaft
C. One stroke of a piston
D. All of the above
[单项选择]At night while the ship is tied up to the dock，a fire breaks out in a cargo hatch. After sounding the alarm，what should the person on watch do?（）
A. Begin fighting the fire immediately
B. Await further orders from the Master
C. Let go the lines to let the vessel drift to an anchorage
D. Send a person to summon the shore authorities
[单项选择](Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）
A. brake horsepower
B. displacement
C. cylinder volume
D. cylinder clearance
[单项选择]Abnormal crankpin bearing and piston skirt surface wear indicate（）
A. a restricted air intake
B. a clogged connecting rod oil passage
C. incorrect connecting rod alignment
D. high cylinder firing temperatures
[单项选择]Piston cooling fins are located（）
A. atop the piston crown
B. beneath the piston crown
C. at the base of the piston skirt
D. inside the cylinder liner cooling water jacket
[单项选择]Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to（）
A. jam in the most worn part of the cylinder when the rings expand
B. break in the most worn part of the cylinder when the rings expand
C. wear eccentrically on the side opposite the end gap
D. overheat and jam at the top center on the combustion stroke
