Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in （）
A . an air bound fuel system
B . damage to cylinder heads and pistons
C . excessive fuel injection
D . excessive air valve lift
相似题目
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Failure of fuel injection is usually due to trouble in the （）.
A . exhaust valves
B . mechanical lubricators
C . cooling water pumps
D . fuel injection pum
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RMAN enables you to open the target database when it is already mounted. Which command must you execute at the RMAN prompt to open the database？（）
A . ’SQL ALTER DATABASE OPEN’；
B . SQL ALTER DATABASE ’OPEN’；
C . OPEN DATABASE；
D . DATABASE OPEN
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The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the （）
A . camshaft
B . piston movement
C . exhaust valves
D . vertical drive
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If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）
A . a glazed surface on the spring
B . nicks in the protective coating
C . a build up of sludge deposits
D . cracks in the surface of the spring
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In a four-stroke cycle diesel engine the intake valves open （）
A . before TDC and close after BDC
B . after TDC and close after BDC
C . before TDC and close before BDC
D . after TDC and close before BDC
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You have to shut down the database instance with the ABORT option because of a hardware failure. Which statement is true about the subsequent opening of the database？（）
A . The database would open normally.
B . The database would not open， and it would stop at mount stage.
C . The database would open after automatically performing instance recovery.
D . The database would not open， and you have to perform database recovery to open it.
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When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
A . quantity of fuel injected is decreased
B . quantity of fuel injected will always be increased
C . start of injection is advanced
D . duration of injection will always be greater
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Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）
A . later and close sooner
B . sooner and close later
C . sooner and close sooner
D . later and close later
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Failure to comply with the above may（）actoin being taken against the vessel.
A . resulted in
B . result in
C . resulting in
D . to result i
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The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.
A . direct action of cam shaft
B . compressed air pressure
C . hydraulic “push rods”
D . direct action of the main piston moving dow
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As there was a power failure in the hospital, the doctor had to （）operation.
A . call for
B . call off
C . call on
D . cal lout
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In a diesel engine, exhaust valves open before the intake ports are uncovered to （） Ⅰ.reduce pumping losses Ⅱ.reduce back pressure
A . Ⅰonly
B . Ⅱonly
C . bothⅠand Ⅱ
D . neitherⅠnor Ⅱ
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Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）
A . increase back pressure during the exhaust process
B . facilitate periodic replacement of the valves
C . reduce the pumping loss associated with scavenging
D . reduce tension on valve spring
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A four-stroke/cycle, 1000horsepower diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperatureThe reason for the failure could be（）
A . glazed liners or pistons
B . high lube oil pressure
C . excessive compression ratio
D . worn valve seats and valve
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Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）
A . To test the starting system
B . To remove air bubbles from the jacket water
C . To ensure that the lube oil system delivers pressure
D . To ensure foreign material (water etc) is not present in the cylinder
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Failure to arrive on time for the appointment may result in the test being canceled.
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When was the tunnel opened to the public？
A．In 1990.
B．In 1992.
C．In the year of 1993.
D．In the late of 1994.
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Failure to control the growth of international debt will also constrain living standards.
A．enhance
B．reinforce
C．restrain
D．stabilize
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In a turbocharged four-stroke/cycle diesel engine, the exhaust valve remains open until after top dead center and the intake valve opens before top dead center to_______.
A.produce a scavenging effect in the combustion space
B.equalize cylinder and exhaust manifold pressures
C.alleviate the difference in valve size between the intake and exhaust
D.flush out condensate that collects after each compression stroke
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The experience from the past failure is of great value to us（）
A．to gain
B．gaining
C．gained
D．gain
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What led to the failure of NASA's mission？
A．Fuel shortage.
B．Loss of data.
C．Fairing separation failure.
D．Satellite malfunction.
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View the Exhibit to examine the error during the database startup.You open an RMAN session for the database instance. To repair the failure, you executed the following as the first command in the RMAN session:RMAN＞ REPAIR FAILURE;Which statement describes the consequence of the command？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/31f166c0cedddf6946f2b336e2153075.jpg' />
A. The command performs the recovery and closes the failures.
B. The command only displays the advice and the RMAN script required for repair.
C. The command produces an error because the ADVISE FAILURE command has not been executed before the REPAIR FAILURE command.
D. The command executes the RMAN script to repair the failure and removes the entry from the Automatic Diagnostic Repository (ADR).
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Failure to comply with the above may______action being taken against the vessel．
A.resulted in
B.result in
C.to result in
D.resulting in
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If you are trying to open the door for somebody else, think ahead and try to position yourself to open the door easily.()
此题为判断题(对，错)。
