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发布时间:2023-10-21 11:30:52

[单项选择]A knocking sound from one cylinder of an operating air compressor indicates ().
A. a defective or broken high pressure un-loader
B. a loose valve plate
C. excessive overload
D. no compression

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[单项选择]Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between ().
A. crown and skirt
B. liner and jacket
C. ring and groove
D. jacket and block
[单项选择]When approaching Block Island Sound from Long Island Sound,you will enter waters governed by the International Rules of the Road when you().
A. pass through The Race
B. cross the territorial sea boundary
C. exit Block Island Sound to the east or south
D. None of the above,as Long Island Sound is governed by the International Rules of the Road
[单项选择]Each cylinder has one starting valve which is usually opened by air pressure and closed by ()
A. nuts and bolts
B. new joints
C. spring force
D. sealing rings
[单项选择]Cracks in cylinder and cylinder covers may () from unequal heating.
A. make
B. cause
C. result
D. produce
[单项选择]A number of cylinder liners are enclosed in one cast iron casing to form a ().
A. cylinder cover
B. cylinder block
C. cylinder frame
D. bed-plate
[单项选择]When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?()
A. Advanced ignition
B. Clogged air intake
C. Leaky exhaust valve
D. High exhaust pressure
[填空题]Phonological rules may move phonemes from one place in the string to another. For example, Modern English verb ask was Old English askian, with the /k/preceding the/s/.Sound change as a result of sound movement is known as m().
[单项选择]You are transferring records from one database to another. You need to decide whether you can use the SqlBulkCopy class to transfer the records. What should you do? ()
A. Ensure that the source database is Microsoft SQL Server.
B. Ensure that the destination database is Microsoft SQL Server.
C. Ensure that the column names in the source table match the column names in the destination table.
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[单项选择]The diffuser prevents pressure pulses from one cylinder () another during operation.
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[单项选择]Persistent knocking in one cylinder of a diesel engine could be caused by().
A. a low load on that cylinder
B. sluggish piston ring action
C. excessive piston crown cooling
D. excessive clearance of piston pin
[单项选择]Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of ()
A. low loading of that cylinder
B. faulty combustion in that cylinder
C. sluggish piston ring action
D. excessive piston cooling
[单项选择]When the starting air valve closes on one cylinder, another starting air valve has () opened on another cylinder whose piston has just commenced its downward stroke.
A. just
B. nearly
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[单项选择]A drop in compression pressure in one cylinder of a diesel engine can be caused by()
A. a leaking fuel injection nozzle
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[单项选择]A faulty injection in one cylinder of an operating diesel engine can be located by ()
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[单项选择]When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass,which action should be taken?()
A. The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings
B. After the new heading is reached,the vessel should steam on that course for at least two minutes before the adjustment
C. During the course change,you should gently tap the compass to remove any error caused by friction on the pivot bearing
D. After steadying on the new heading,the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error

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