A.Hard alloy steel construction
B.Beveled edges on the valve head
C.Low alloy steel construction
D.Poppet type design
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A.a leaking seal ring
B.heat transfer from exhaust valves
C.restricted cooling passages
D.overheated intake valves
A.top of the ring groove
B.back of the ring groove
C.bottom of the ring groove
D.piston ring end clearance
A.oil rings only
B.compression and scraper rings
C.cylinder liner sealings
D.cylinder liner ring grooves
A.wrist pin bushings
B.compression rings
C.cylinder liner seals
D.cylinder liner sealing ring
A.Gasoline
B.Water
C.Lubricating oil
D.sulphur compounds
最新試題
（） is not installed on the main switchboar.
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Which of the following items don’t belong to dock repair works?（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）