A.crankshaft
B.connecting rod
C.cross-head
D.main beating
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A.doesnt use a drain tank but a head tank
B.uses a drain tank not head tank
C.uses a drain tank and a head tank
D.uses neither a drain tank nor a head tank
A.a sump tank
B.a feed well
C.a double bottom tank
D.a drain tank
A.fresh water
B.sea water
C.lubrication
D.fuel oil
A.valve loop
B.valve uniflow
C.valve overlap
D.valve grinding
A.the inlet valve is open
B.the exhaust valve is open
C.both valves are close
D.both valves are open
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If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
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Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
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To determine if the lube oil filter elements need changing, （）.