When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.
A . has to be handled
B . may be handled
C . has being handled
D . will be handling
相似题目
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The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed （）.
A . metering
B . timing
C . rate of injection
D . rate of distributio
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When a repeating timer expires,（）.
A . The When-Timer-Expired trigger resets the timer's iteration parameter.
B . The When-Custom-Item-Event trigger fires and executes the desired actions.
C . It is put in a queue of expired timers for processing on a first-in-first-out basis.
D . The When-Timer-Expired trigger fires instantly regardless of any other processing in the form module.&e
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Small crack in the crankshaft bearing surface of a diesel engine are an indication of（）
A . corrosion fretting
B . insufficient lubrication
C . abnormal wear
D . fatigue failure
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One method of determining crankshaft misalignment is by（）
A . laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
B . measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
C . rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
D . taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotatio
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When does a transaction complete?（）
A . when a DELETE statement is executed
B . when a ROLLBACK command is executed
C . when a PL/SQL anonymous block is executed
D . when a data definition language (DDL) statement is executed
E . when a TRUNCATE statement is executed after the pending transact io
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The crankshaft of diesel engine is supported by （）.
A . tension stretch
B . tie rods
C . through bolts
D . main bearing
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A crankshaft whose center of gravity coincides with its center line is said to be （）.
A . dynamically balanced
B . statically balanced
C . counter balanced
D . resonantly balanced
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When the direction handle of telegraph is moved, the relative position of camshaft and crankshaft will be（）
A . changed accordingly
B . unchanged
C . positioned ahead
D . positioned aster
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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
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In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the （）.
A . crosshead
B . crankpin
C . crank journal
D . gudgeon pi
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The （） of the semi-built method of the construction crankshaft is that by making the two webs and crankpin from a single forging the grain flow in the steel follows the web round into the crankpin and back down the other web.
A . advantages
B . disadvantages
C . power advantages
D . power disadvantage
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A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a （）.
A . slow-speed diesel
B . medium-speed diesel
C . high-speed diesel
D . constant-speed diesel
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There should be a lubricating oil （） between the main beatings and the crankshaft.
A . film
B . cap
C . lacquer
D . shell
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Which two statements are true when when a Coherence cluster member is lost ？ （）
A . Remaining members recover by repartitioning the data across the remainig cluster members in parallel with normal request processing
B . Some latencies may be experienced due to higher priority of recovery
C . In flight operations may be lost
D . A system administrator must manually assist recovery of the lost data
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A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balanced
A . Ⅰ only
B . Ⅱ only
C . both Ⅰ and Ⅱ
D . neither Ⅰ nor Ⅱ
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An increase in load on a diesel engine results in （） of speed of the crankshaft.
A . a reduction
B . an increase
C . an outing
D . a downward
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When navigating a vessel，you（）.
A . Can always rely on a buoy to be on station
B . Can always rely on a buoy to show proper light characteristics
C . Should assume a wreck buoy is directly over the wreck
D . Should never rely on a floating aid to maintain its exact positio
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On a large diesel engine installation, crankshaft axial alignment is maintained by the （）
A . piston rod guides
B . engine thrust bearing
C . crosshead bearing
D . main shaft flexible coupling
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In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.
A . telescopic pipes
B . large bore
C . drilled passage
D . tied rod
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What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）
A . 375 RPM
B . 500 RPM
C . 750 RPM
D . 1500 RPM
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7 When does the referee give the other team a free kick?A When a player commits a foul.B When the ball goes out of the sides of the pitch.C When the ball leaves the ends of the pitch.
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When a neoplasm metastasizes it
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In four-stroke diesel engine, the cycle of events is completed in （) of crankshaft.A.one
In four-stroke diesel engine, the cycle of events is completed in () of crankshaft.
A.one revolution
B.two revolutions
C.four revolutions
