更多"The speed of the camshaft in a two-"的相关试题:
[单项选择]Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）
A. during the valve overlap period
B. with only the exhaust valve open
C. at a pressure below atmospheric
D. without cooling the cylinders or pistons
[单项选择]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.
A. fuel injectors
B. exhaust valves
C. intake valves
D. all of the above
[单项选择]In a four-stroke/cycle diesel engine, the camshaft rotates at （）
A. twice the crankshaft speed
B. half the crankshaft speed
C. the same speed as that of the crankshaft
D. a speed independent of that of the crankshaft
[单项选择]The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）
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
[单项选择]In a four-stroke engines the camshaft rotates at （）.
A. half the engine rotational speed
B. twice the engine rotational speed
C. the engine rotational speed
D. four times the engine rotational speed
[单项选择]If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）
A. too low
B. a little lower
C. a little higher
D. exactly the same
[单项选择]（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
[单项选择]（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.
A. The driven gear
B. The drive
C. The grease
D. The lubricating oil
[单项选择]In a four-stroke engine the camshaft rotates at （）.
A. half the engine speed
B. twice the engine speed
C. the engine speed
D. four times the engine speed
[单项选择]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.
A. apparent slip
B. tree slip
C. pitch
D. propulsive efficiency
[单项选择]The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.
A. two-stroke
B. four-stoke
C. long-stroke
D. short-stroke
[单项选择]A Doppler speed log indicates speed through the water（）.
A. at all times
B. in the bottom return mode
C. in the volume reverberation mode
D. only when there is no current
[单项选择]Safe speed is defined as that speed where（）.
A. you can stop within your visibility range
B. the vessel is not subject to vibrations
C. you are traveling slower than surrounding vessels
D. you can take proper and effective action to avoid collision
[单项选择]A Doppler speed log indicates speed over ground（）.
A. at all times
B. in the bottom return mode
C. in the volume reverberation mode
D. only when there is no current
[单项选择]SAFE SPEED is defined as that speed where（）.
A. you can stop within your visibility range
B. you can take proper and effective action to avoid collision
C. you are traveling slower than surrounding vessels
D. no wake comes from your vessel
[单项选择]“safe speed” is defined as that speed where（）.
A. you can stop within your visibility range
B. you can take proper and effective action to avoid collision
C. you are traveling slower than surrounding vessels
D. no wake comes from your vessel
