A.must replace
B.must to be equipped
C.has to be repaired
D.have to be renewed
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A.larger than
B.smaller than
C.equal to
D.none of the above
A.chromium-plate against wear
B.anti-corrosion treated
C.white metal lined against wear
D.flame hardened against wear
A.to revolve
B.revolved
C.revolving
D.to be revolved
A.crankshaft
B.connecting rod
C.cross-head
D.main beating
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
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