輪機英語船舶動力裝置單項選擇題每日一練(2019.01.13)

單項選擇題
Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.
A.have nothing to do with
B.having nothing to do with
C.have much to do with
D.having much to do with
單項選擇題
Vents are led from the engine to head tank （） from the cooling water.
A.for the release of air
B.for the release of water
C.in order to the release of air
D.because the release of air
單項選擇題
（） is used for washing and drinking.
A.The ballast system
B.The salt water system
C.The bilge system
D.The domestic system
單項選擇題
On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.
A.thrust block
B.sounding rod
C.connecting rod
D.push rod
單項選擇題
For an ordinary four-stroke engine the exhaust valves open （）.
A.after TDC
B.before TDC
C.after BDC
D.before BDC