單項(xiàng)選擇題The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by ()

A.pumping action of the piston
B.pressure of the fuel charge
C.vacuum developed in the manifold
D.pressure of the fresh air charge


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve?()

A.Electric power and starting air
B.Lube oil standby pump and control air
C.Hydraulic switch and engage jacking gear
D.Motor drain and pneumatic control system power

2.單項(xiàng)選擇題A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable()

A.engine overload
B.leaky valves
C.stuck or broken piston rings
D.low air injection pressure

3.單項(xiàng)選擇題Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?()

A.Corrosion and eventual failure of the tank
B.Gumming of the tank relief valves
C.Immediate failure of components downstream of the compressed air system
D.Boiling of the water oil mixture as pressure is reduced

4.單項(xiàng)選擇題During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ()

A.effective cylinder scavenging and cooling
B.constant pressure from the turbochargers
C.cooler operation of the exhaust system
D.effective constant pressure for turbocharger operation

5.單項(xiàng)選擇題Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?()

A.Lubrication
B.Cooling
C.Fuel
D.Electric ignition

最新試題

If two A.C.generators are to be operated in parallel, the load is distributed evenly by()

題型:單項(xiàng)選擇題

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()

題型:單項(xiàng)選擇題

Which of the following items don’t belong to dock repair works?()

題型:單項(xiàng)選擇題

When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

題型:單項(xiàng)選擇題

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

題型:單項(xiàng)選擇題

Cold weather starting of a diesel engine may be made easier by()

題型:單項(xiàng)選擇題

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()

題型:單項(xiàng)選擇題

If separating effect is not good, which measure should be taken ()

題型:單項(xiàng)選擇題

Under MARPOL Code the ship to which it applies has to carry ()

題型:單項(xiàng)選擇題

To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()

題型:單項(xiàng)選擇題