shut
closing
opened
closed
第1题:
natural aspiration
masked intake valves
air cells
scavenging air
第2题:
coming up with
looking forward to
making up for
getting rid of
第3题:
The upper piston rings m large, slow-speed, two-stroke/cycle diesel engines are most effectively lubricated by oil ____.
A.fed from mechanical lubricators
B.thrown off from the main bearings
C.supplied from wick fed drip lubricators
D.flow from a centrifugal or banjo oiler
第4题:
shut
closing
opened
closed
第5题:
wide compression rings are used
oil rings are located above the piston
chromium plating is used on all piston rings
oil rings are located near the bottom of the piston skirt
第6题:
coming up from the BDC
coming up from the TDC
coming down from the BDC
coming down from the TDC
第7题:
is coming upward;cylinder ring belt
is going downward;piston ring belt
is coming upward;piston ring belt
is going downward;cylinder ring belt
第8题:
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by
A.natural aspiration
B.masked intake valves
C.air ceils
D.scavenging air
第9题:
one half crankshaft speed in a two-stroke cycle diesel engine
crankshaft speed in a two-stroke cycle diesel engine
two times crankshaft speed in a two-stroke cycle diesel engine
one-fourth times crankshaft speed in a four-stroke cycle diesel engine
第10题:
open
uncover
covered
closed