A、shut
B、closing
C、opened
D、closed
更多“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 （）.”相关的问题
A、two crankshaft revolutions in a two-stroke/cycle engine B、two power strokes in a two-stroke/cycle engine C、one power stroke in a two-stroke/cycle engine D、two piston strokes in a two-stroke/cycle engine
A、In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater B、Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports C、No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine D、The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine
A、one half crankshaft speed in a two-stroke cycle diesel engine B、crankshaft speed in a two-stroke cycle diesel engine C、two times crankshaft speed in a two-stroke cycle diesel engine D、one-fourth times crankshaft speed in a four-stroke cycle diesel engine
A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine D、two-stoke/cycle diesel engines require more complicated lubrication piping
A、most critical in a four-stroke cycle diesel engine B、most critical in a two-stroke/cycle diesel engine C、most critical in a four-stroke/cycle diesel engine if it is turbocharged D、of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
A、has little or no internal friction B、has a lower effective compression ratio C、operates with scavenge air under a positive pressure D、operates without energy absorbing intake and exhaust strokes
A、the same indicated horsepower as a four-stroke/cycle engine B、twice the indicated horsepower as a four-stroke/cycle engine C、one half indicated horsepower as a four-stroke/cycle engine D、one power stroke for every two crankshaft revolutions
A、a two-stroke engine works without exhaust operation B、a two-stroke engine works without compression stroke C、a two-stroke engine works without expansion stroke D、a two-stroke engine works without suction operation
A、a two-stroke engine can’t work without cylinders B、a two-stroke engine can’t work without pistons C、a two-stroke engine can’t work without crankshafts D、a two-stroke engine can’t work without a blower
A、less even torque B、higher cylinder head temperatures C、fewer power strokes per revolution D、greater weight/size requirements
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