If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）
A . excessive ring action
B . excessive ring temperature
C . improper ring rotation
D . excessive ring face wear
相似题目
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If the back clearance of a piston ring is excessive,（）
A . compression pressure in the cylinder will be higher
B . carbon will accumulate behind the ring
C . combustion gases will penetrate beneath the ring land
D . piston side thrust will be increased
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The function of the piston compression rings used in a diesel engine is to （）
A . seal the space between the piston and liner
B . transmit heat from the piston to the cylinder liner
C . reduce the amount of combustion gas blow-by
D . all of the above
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Which of the following metrics provided by the iostat report is used to initially determine if a system is I/O bound？（）
A . % idle
B . % sys
C . % user
D . % iowait
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If you hear a continuous blast of the ship’s whistle for a period of a period of not less than 10 saconds supplemented by a continuous ringing of the general alarm bells for not less than 10 seconds,you should go to your（）.
A . boat station
B . fire station
C . man overboard station
D . collision statio
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If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）
A . The oil control rings will seal improperly and wear rapidly
B . The piston will overheat due to insufficient lubrication
C . Excessive oil will remain on the cylinder wall
D . Light brown smoke will emanate from the engine exhaust
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Which of the following metrics provided by the iostat report is used to initially determine if a disk is I/O bound？（）
A . tin
B . tout
C . % idle
D . % tm_act
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If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.
A、combustion control air system
B、supply air system
C、ships service air system
D、low pressure deck air system
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Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
A . Control the amount of lube oil burned in the combustion chamber
B . Transmit heat from the piston to the cylinder liner
C . Prevent damage to ring groove inserts by acting as a heat dam
D . Dissipate combustion chamber gas pressure by channeling it through the ring ga
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If the piston ring gap remains insufficient when installing new rings, youshould（）
A . install oversized rings
B . hone the cylinder liner to allow ring installation
C . compress the rings tighter with a compressing tool
D . file the ends of the ring
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A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）
A . combustion gas blow-by
B . excessive lubrication
C . properly functioning rings
D . insufficient cylinder cooling
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The piston rings if found worn out （） and supplied by shipchandler.
A . must replace
B . must to be equipped
C . has to be repaired
D . have to be renewed
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The main function of piston compression rings is to （）
A . prevent excessive cylinder liner wear
B . reduce friction losses in the engine
C . seal the space between the piston and the liner
D . limit upward flow of lube oil into the combustion space
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What is the impact of the following backup if it exceeds the duration allowance？（） Backup as compressed backupset duration 2：00 partial minimize load database ；
A . The entire backup will fail.It will not be usable for recovery.
B . The entire backup will failbut any datafile successfully backed up will be usable for recovery.
C . If this backup fails，subsequent backups will prioritize datafiles not backed up.
D . If this backup fails，an error will be raised and any other commands will not be executed.
E . If this backup fails，no error will be raised and any other commands will be executed.
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If you were operating a centrifugal water service pump with worn wearing rings, the （）.
A . pump would be very noisy
B . pump would vibrate excessively
C . pump would develop insufficient flow
D . stuffing box would leak excessively
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10.What does the ring gesture (you form an O by holding the tip of your forefinger to the tip of your thumb) mean in Britain?
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I didn’t answer the phone _________I didn’t hear it ring. A) if B) unless C) although D) because
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10.What does the ring gesture (you form an \O\ by holding the tip of your forefinger to the tip of your thumb) mean in Britain?
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The ring gesture, where you form. an "O" by holding the tip of your forefinger to the tip of your thumb, means in France that you think something is（).
A、worthless
B、"I'll kill you!"
C、good
D、great
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The ring gesture, where you form. an "O" by holding the tip of your forefinger to the
tip of your thumb, means in France that you think something is_____.
A. good
B. "I'll kill you!”
C. worthless
D. great
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—Hello, Mr. Brown, I' m ringing about our component delivery. It’s not arrived yet and it’s already three o' clock in the afternoon.—Let’s see. . . It’s______reach you on Tuesday afternoon.
A．owing to
B．likely to
C．due to
D．subject to
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If I do not ______ the phone home, ring me at work.
A.reply
B.return
C.respond
D.answer
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What is happening if Larry's phone rings at 3 o'clock in the morning？
A．Someone on the bridge is being attacked.
B．Someone is threatening to destroy the bridge.
C．Someone on the bridge is attempting to kill himself.
D．Someone has fallen off the bridge.
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Only if the alarm clock rings, ____ wake up.
A．canwe
B．wecan
C．didwe
D．wedid
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the ring gesture, where you form. an "o" by holding the tip of your forefinger to the tip of your thumb, means in france that you think something is ______.
A、great
B、worthless
C、"I'll kill you!"
D、good
