A.unusually solid welded
B.never be solid forged
C.almost invariably solid forged
D.almost invariably be welded
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A.result from
B.result in
C.give out
D.given from
A.make
B.cause
C.result
D.produce
A.boiler
B.heater
C.engine
D.cooler
A.to retain
B.to remain
C.to maintenance
D.to have
A.good lubrication
B.low thermal stress
C.good mechanical properties
D.acid corrosion
最新試題
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
In using reduction gears to obtain efficient propeller speeds, （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
Diesel engine control can be obtained by the bridge （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
A thrust bearing is used with a propulsion diesel engine to （）.
The main purpose of the piston oil scraper rings is to （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
Combustion knock occurring in a diesel engine can be caused by （）.
Routine monitoring of a diesel engine should include （）.