更多"If a gasoline engine turns over fre"的相关试题:
[单项选择]If a diesel engine driving a generator turns over freely but fails to fire properly, the cause could be （）
A. excessive compression pressure
B. air in the fuel lines
C. high fuel pressure
D. excessive load
[单项选择]A diesel engine is similar to a gasoline engine except that the former has no （）.
A. cross-head
B. cylinder
C. connecting rod
D. spark plug
[单项选择]A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
A. as much fuel as
B. less fuel than
C. less fuel as
D. more fuel than
[单项选择]Before starting any diesel or gasoline engine，which of the following must be checked? （）
A. Oil level
B. Flow of cooling water
C. Exhaust discharge
D. All of the above
[单项选择]Before starting a gasoline engine on a motorboat，you should make sure for safety that（）.
A. the gasoline tank is full
B. the bilges，cabins，etc. are thoroughly ventilated
C. you have fresh water on board
D. Each of the above is followed
[单项选择]To find the cause of a gasoline engine’s failure to start，you should（）.
A. Break the joint in the fuel line at the engine and let the gas run in the bilges
B. Disconnect the wires at the spark plugs and make the spark jump the gap
C. Prime the engine with ether through spark plug openings
D. Ventilate the space，then check the battery，spark plugs，carburetor，and fuel line
[单项选择]If a diesel engine turned over freely but failed to start, the cause could be （）
A. water in the fuel
B. cold lube oil
C. excessive starting air pressure
D. excessive fuel pressure
[单项选择]An engine compartment gasoline fire requires which type of extinguisher?（）
A. Carbon dioxide
B. Dry chemical
C. Foam
D. All of the above
[单项选择]If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）
A. excessive fuel pressure
B. high lube oil viscosity
C. inadequate fuel injection
D. excessive starting air pressure
[单项选择]The diesel engine is similar to the gasoline engine in that （）.
A. both of them are ignited by compressed air
B. both of them are the forms of external combustion engines
C. both of them have spark plugs
D. the power is developed by the piston in the cylinder
[单项选择]In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
A. a flash generator
B. a flash evaporator
C. a vacuum boiling evaporator
D. a boiler
[单项选择]If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）
A. Move the fuel control mechanism to the no fuel position
B. Block the fuel supply by closing the master fuel valve
C. Shut off the fuel supply and block the flow of intake air
D. Relieve all pressure in the fuel system
[单项选择]An over-speed trip stops a diesel engine when the engine （）
A. runs out of fuel
B. has low lubricating oil pressure
C. exceeds a set maximum speed
D. has high cooling water temperature
[单项选择]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[单项选择]Which statement is TRUE concerning gasoline vapors on board a vessel（）.
A. They are heavier than air and will settle in the lowest part of the vessel
B. They are lighter than air and will settle in the highest part of the vessel
C. They should be vented into the engine to improve combustion
D. They should be vented into the wheelhouse
[单项选择]Gasoline fumes tend to（）.
A. settle near the bottom of the bilge
B. settle near the top of the bilge
C. settle evenly throughout all levels of the bilge by mixing with air
D. disperse to atmosphere
[单项选择]Diesel engines are considered safer than gasoline engines because（）.
A. they are more heavily built
B. the fuel used is less volatile
C. they can be easily reversed
D. they operate at a lower speed
