更多"Prior to starting most medium-speed"的相关试题:
[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]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]A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
A. low TBN value
B. high alkaline reserve
C. low flash point
D. high pour point
[单项选择]Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will 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 coolant
[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]Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）
A. decrease the time required between cleanings
B. removes all large and small foreign objects
C. ensure a positive flow of oil at all times
D. ensure that all lube oil has been treated twice
[单项选择]Prior to starting an AC generator prime mover, the voltage regulator cutout switch should be placed in the （）
A. manual position
B. bus neutral position
C. raise voltage position
D. transfer position
[单项选择]Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）
A. test the starting system
B. remove condensation from the cylinders
C. check the compression
D. check for proper lube oil pressure
[单项选择]Prior to lowering the lifeboat，the most important item to check is the（）.
A. oars
B. sail
C. boat plug
D. life preservers
[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]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]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]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]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]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
