更多"Propulsion engines and the vast maj"的相关试题:
[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]Propulsion of the vast majority of contemporary merchant ships (especially containerships and VLCCs) utilizes（） as prime mover.
A. gas turbine
B. diesel engine
C. steam engine
D. gasoline engine
[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]Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）
A. filtering
B. centrifuging
C. depositing
D. operating
[单项选择]A defective injector nozzle in a propulsion diesel engine can cause（）
A. engine power losses
B. smoking due to unburned fuel
C. high exhaust temperature readings
D. all of the above
[单项选择]The main propulsion diesel continues running after you try to shut downYoushould now attempt to（）
A. stop the combustion air supply
B. engage the jacking gear
C. secure the lube oil pump
D. shut off the fuel at the day tank
[单项选择]Crankcase explosions in propulsion diesel result from（）
A. the splashing of lubrication oil by the crankshaft
B. the dilution of crankcase oil with particles of combustion
C. broken fuel lines spraying oil on the crankcase
D. the ignition of unburned fuel and air in the crankcase
[单项选择]When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）
A. starting air pressure
B. scavenge air pressure
C. over-speed trip
D. banjo oiler line
[单项选择]Cast iron pistons used in large propulsion diesel engines are constructed with （）
A. not taper what so ever
B. the skirt being tapered and smaller than the crown
C. the skirt being tapered and larger than the crown
D. the crown being tapered and smaller than the skirt
[单项选择]Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）
A. increasing the quantity of starting air
B. increasing the lube oil pressure
C. heating the engine fuel supply
D. heating the engine jacket water
[单项选择]The construction of the main propulsion engine lube oil sump should （）
A. have no plating joints of 90
B. retain the lube oil as long as possible before it recirculates through the system
C. provided drain/return lines that are no greater than 24 inches from the pump suction
D. be provided with only a perfectly horizontal bottom
[单项选择]An indication of an overloaded main propulsion diesel engine is （）
A. white smoke in the exhaust
B. high exhaust gas pyrometer readings
C. sparks in the exhaust
D. blue smoke in the exhaust
[单项选择]If a main propulsion diesel engine hunts excessively at idle speed, you should （）
A. adjusts the idle speed control
B. drain and flushes the governor and replace the oil
C. adjusts the compensating needle valve
[单项选择]Typical marine propulsion plants include（） directly coupled to the vessel’s single large-diameter, fixed-pitch propeller.
A. a single, long-stroke, slow-speed, turbocharged, two-stroke diesel engine
B. a single, long-stroke, medium-speed, turbocharged, four-stroke diesel engine
C. two medium-speed, turbocharged, four-stroke diesel engines
D. a variable-speed AC generator
[单项选择]The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）
A. Faulty thermostatic bypass valve
B. Eroded zinc pencils in the heat exchanger
C. Steam formation in the expansion tank
D. Excessive leakage from jacket water pump seal
[单项选择]Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.
A. decreased fuel consumption per brake horsepower
B. more complete cylinder scavenging
C. extended valve life
D. carbon formation on combustion chamber surfaces
[单项选择]When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be（）
A. disengaging the clutch firstly, then stopping the main engine
B. stopping the main engine firstly, then disengaging the clutch
C. stopping the cooling water pump firstly, then stopping the main engine
D. stopping the main engine and disengaging the clutch at the same time
[单项选择]In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）
A. governor droop
B. speeder spring tension
C. fuel rack lag
D. load on the engine
