更多"During the suction stroke, the pist"的相关试题:
[单项选择]The piston moving up and down keeps the crankshaft （）.
A. to revolve
B. revolved
C. revolving
D. to be revolved
[单项选择]During which of the listed piston stroke of a four-stroke/cycle diesel engine, is the piston moving downward?（）
A. Intake stroke
B. Compression stroke
C. Exhaust stroke
D. Pumping stroke
[单项选择]In the suction stroke, the crankshaft is rotating clockwise and the piston is moving （） the cylinderThe inlet valve is （） and a fresh charge of air is being drawn or pushed into the cylinder by the turbocharger.
A. up；opened
B. down；open
C. up；closed
D. down；closed
[单项选择]In the suction stroke air is induced into the cylinder （）In the compression stroke the air is compressed.
A. by an fuel valve
B. through an inlet valve
C. with an exhaust valve
D. from an outlet valve
[单项选择](Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）
A. brake horsepower
B. displacement
C. cylinder volume
D. cylinder clearance
[单项选择]During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the（）
A. piston skirt
B. pinion
C. crosshead
D. compression rings
[单项选择]The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.
A. shut
B. closing
C. opened
D. closed
[单项选择]The four-stroke cycle begins with the piston （）.
A. coming up from the BDC
B. coming up from the TDC
C. coming down from the BDC
D. coming down from the TDC
[单项选择]On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.
A. thrust block
B. sounding rod
C. connecting rod
D. push rod
[单项选择]An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
A. cause loss of hydraulic oil from the system
B. result in extreme damage to the pump
C. cause damage to the pump ff not continually drained from the pump casing
D. result in the system high side pressure to substantially drop off
[单项选择]Broken piston rings manifest themselves during the scavenge port inspection by（）
A. Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B. Blackish appearance
C. Fractured rings and missing rings
D. all off the above
[单项选择]The average pressure exerted on piston during each power stroke is termed（）
A. indicated horsepower
B. mean effective pressure
C. exhaust back pressure
D. compression pressure
[单项选择]A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.
A. crankshaft revolution
B. mechanical cycle of operation
C. period of two combustion cycles
D. cycle of two events
[单项选择]During working, when the piston is near the （）, the air ignites the fine spray of fuel.
A. TDC
B. DTC
C. BDC
D. BCD
[单项选择]The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.
A. control rack
B. delivery valve
C. governor speed
D. plunger crossbar
[单项选择]Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of （）
A. less even torque
B. higher cylinder head temperatures
C. fewer power strokes per revolution
D. greater weight/size requirements
[单项选择]Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be （）.
A. one size smaller than the pump suction nozzle
B. the same size as the pump suction nozzle
C. one size larger than the pump suction nozzle
D. installed with a short radius elbow at the pump
[单项选择]The compressor suction line conveys the refrigerant vapor from （） to （）.
A. condenser；evaporator
B. evaporator；compressor
C. compressor；condenser
D. None of the above
