单项选择题
The lower section of a piston is called the ().
A.land
B.skirt
C.crown
D.plate
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相关考题
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单项选择题
To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should ().
A.increase the governor oil pressure
B.adjust the speed droop setting
C.adjust the speeder spring travel
D.adjust the compensating needle valve -
单项选择题
The () engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A.four-stroke
B.two-stroke
C.slow speed
D.reversible -
单项选择题
As for turbine oil, contacting with water in the form of steam will be inevitable so good () properties will be essential.
A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying
