更多"（） is usually driven by the engine "的相关试题:
[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]Camshafts are usually driven by timing gears or （）.
A. push rods
B. chain drives
C. rocker arms
D. flywheels
[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 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]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]For a propeller direct driven by the engine,（）.
A. the thrust pads are while metal faced on both sides
B. the thrust pads are while metal faced only on the forward side
C. the thrust pads are while metal faced only on the after side
D. intermediate shaft usually supported by a plummer block
[单项选择]A power-driven vessel shall have her engine ready for（）when the visibility is restricted.
A. immediately stop
B. immediately maneuvering
C. immediately anchoring
D. immediately going astern
[单项选择]During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）
A. notify the duty officer, reduce the engine speed, take some measures to remove failures
B. notify the duty officer and stop the engine immediately, find the cause and remove failures
C. notify the C/E
D. notify the captain
[单项选择]The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）
A. provide exhaust back pressure
B. prevent exhaust smoke emissions
C. power a reciprocating supercharger
D. muffle exhaust gas noise
[单项选择]Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.
A. hull
B. projection
C. graphitization
D. foundation
[单项选择]Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）
A. back
B. side
C. gap
D. bottom
[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]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[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]The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.
A. 475 RPM
B. 950 RPM
C. 1900 RPM
D. 2400 RPM
[单项选择]Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A. open the bypass line
B. cut in the lube oil cooler
C. pressurize the lube oil system
D. top off the expansion tank
[单项选择]If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
A. at each control station
B. in the chief engineer’s quarters
C. in the captains quarters
D. All of the above are correct
