4678646
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace casi 9 años
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Pregunta 1
Pregunta
poor combustion in a diesel engine is due to
Respuesta
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cold intake air
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overhead injectors
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carbon deposits on the injectors
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all of the above
-
none of the above
Pregunta 2
Pregunta
Excessive oil consumption on a diesel engine could be the result of:
1. high oil temperature
2. oil diluted with fuel
3. low oil pressure
4. cracked bearings
Respuesta
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1,2
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1,2,3
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2,3
-
3,4
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1,2,3,4
Pregunta 3
Pregunta
High oil temperatures in a diesel engine may be caused by:
1. low cooling water temp
2. improper combustion
3. contaminated oil
4. overheated bearings
Respuesta
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1,2
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1,2,3
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2,3
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3,4
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1,2,3,4
Pregunta 4
Pregunta
How many pumps are required in the distributer system for the injection of fuel into a large industrial diesel engine?
Respuesta
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one
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two
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three
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one pump for each cylinder
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none of the above
Pregunta 5
Pregunta
Where is the oil filter located in a large diesel engine lubricating oil system?
Respuesta
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in the crankcase
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on the discharge side of the oil cooler
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between the oil pump and the cooler
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oil pump suction line
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cylinder discharge
Pregunta 6
Pregunta
Which systems may be used for injecting fuel into a diesel engine cylinder?
Respuesta
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direct and indirect
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solid injection system and carburetion
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air injection and turbo injection
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solid injection system and air injection system
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common system and distributor system
Pregunta 7
Pregunta
A fuel injector
Respuesta
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has a fuel injection nozzle
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injects fuel and air into the cylinder
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inject fuel into the cylinder during the intake stroke
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heats the fuel in order to ensure complete combustion
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injects fuel vapor into the cylinder
Pregunta 8
Pregunta
A carburetor is used to:
1. atomize the fuel
2. heat the fuel
3. produce a vacuum
4. control the fuel/air mixture
5. add carbon to the fuel
6. mix the fuel and air
Respuesta
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1,3,5
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2,4,6
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1,2,3,4
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1,3,4,5
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1,3,4,6
Pregunta 9
Pregunta
The _______ ignition system produces a hotter spark at high speeds:
Respuesta
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magnetic
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coil
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distributor
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magneto
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dynamo
Pregunta 10
Pregunta
The coils function in a battery ignition system is to
Respuesta
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increase the current to the plugs
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increase the voltage to the plugs
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increase both the current an voltage to the plugs
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increase the spark across the plugs
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create a constant voltage to supply the plugs
Pregunta 11
Pregunta
The camshaft in a large internal combustion engine may be driven by
1. chain
2. gear
3. belt
4. fluid coupling
5. magnetic clutch
6. conduit
Respuesta
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1,2,3
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4,5,6
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1,3,6
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2,4,6
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1,2,4
Pregunta 12
Pregunta
An oil priming pump on an internal combustion engine is used:
Respuesta
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upon shutdown
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before start-up
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during operation
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to fill the crank case
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to filter the oil
Pregunta 13
Pregunta
Internal combustion engines that incorporate a heat exchanger cooling system are considered
Respuesta
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an indirect cooling system
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an open circuit cooling system
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a closed circuit cooling system
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a reverse flow cooling system
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none of the above
Pregunta 14
Pregunta
Overheating an internal combustion engine is caused by:
Respuesta
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using the wrong oil
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running at low speeds
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early fuel injection
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oil leaks
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none of the above
Pregunta 15
Pregunta
When cooling is inadequate on an internal combustion engine
Respuesta
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the pistons may contract and sieze
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the exhaust valves may become burned
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the oil may solidify
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the oil becomes progressively more viscous
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all of the above
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