更多"Diesel engines are started by suppl"的相关试题:
[单项选择]Diesel engines are started by supplying () into the cylinders in the appropriate sequence for the required direction.
A. cooling water
B. compressing air
C. compressed air
D. cylinder oil
[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]The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called().
A. engine displacement
B. super-aspirating
C. air injection
D. supercharging
[单项选择]Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine ()
A. camshaft beatings
B. main bearings
C. piston crowns
D. cylinder walls
[单项选择]Auxiliary diesel engines can be automatically shut down as a result of ()
A. low lube oil temperature
B. low lube oil pressure
C. high exhaust temperature
D. high cooling water pressure
[单项选择]Although the crankshafts of medium diesel engines appear to be robust, they rely on the support of () to develop their full strength.
A. the piston rods
B. the crank throws
C. the thrust bearings
D. the main bearings
[单项选择]Diesel engines obtain combustion air through turbo chargers,blowers,or().
A. air starters
B. carburetors
C. natural aspiration
D. air receivers
[单项选择]Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is()
A. entirely constant pressure
B. entirely constant temperature
C. a combination of constant volume and constant pressure
D. a combination of constant temperature and constant pressure
[单项选择]Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is()
A. a combination of constant volume and constant pressure
B. a combination of constant temperature and constant pressure
C. entirely constant pressure
D. entirely constant volume
[单项选择]A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is achieved by the superior combustion performance()
A. shockless
B. smokeless
C. no vibration
D. noiseless
[单项选择]() the engines, the diesel engine is() used engine on board.
A. Between;more commonly
B. Among;the most commonly
C. Between;not more commonly
D. Among;not the most commonly
[单项选择]Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the ().
A. wheelhouse control station
B. engine room control station
C. captains office
D. chief engineers office
[单项选择]If a diesel engines exhaust temperature is abnormally high, the cause could be()
A. too light of a load
B. injection timing is too early
C. overloading of the engine
D. too low of a compression ratio
[单项选择]Critical speed in diesel engines occurs when engine torque pulsations become ()
A. opposed to the crankshaft rocking couple
B. resonant with the crankshaft natural frequency
C. critical fore and aft crankshaft vibrations
D. horizontal whipping motions of the crankshaft
[单项选择]In large marine diesel engines cylinder oils usually contain additives formulated to impart the () to clean the rings and grooves.
A. inefficiency
B. oiliness
C. detergency
D. purity
[单项选择]Cylinders of marine diesel engines are normally cooled by ().
A. sea water
B. fine mineral oil
C. sanitary water
D. fresh water
[单项选择]Directional intake ports in diesel engines are used to ().
A. reduce air charge turbulence
B. induce air swirl
C. deflect hot combustion gas away from the valves
D. oppose the effects of piston induced squish
[单项选择]For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by ()
A. moving the governor control to stop
B. shutting off the lubricating oil supply
C. tripping the governor emergency stop lever
D. shutting off the fuel supply
[单项选择]Some diesel engines are supercharged with a ()
A. slam charger
B. turbocharger
C. fuel atomizer
D. fuel injector