单项选择题
The piston cooling system may employ similar components, except that （） is used instead of a head tank.
A.a sump tank
B.a feed well
C.a double bottom tank
D.a drain tank
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相关考题
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单项选择题
The pistons are cooled by oil supplied from the forced （） system.
A.fresh water
B.sea water
C.lubrication
D.fuel oil -
单项选择题
The period when both inlet valves and exhaust valves are open is referred to as （）.
A.valve loop
B.valve uniflow
C.valve overlap
D.valve grinding -
单项选择题
The period of valve overlap is when （）.
A.the inlet valve is open
B.the exhaust valve is open
C.both valves are close
D.both valves are open
