The crank chamber oil _____.
A.can be recovered
B.is only supplied to cylinders
C.only feeds the main bearing
D.is a kind of detergent
第1题
Operating conditions in the crank chamber are very _____ those in the cylinder.
A.the same as
B.similar to
C.separated from
D.different from
第2题
A.one another
B.the other
C.each other
D.each others
第3题
A.laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
B.measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
C.rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
D.taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
第4题
A.45
B.60
C.90
D.100
第6题
When using the hand crank on gravity davits,you should ALWAYS ()__.
A.make sure the hand brake is disengaged
B.put the emergency disconnect switch in the off position
C.make sure the crank is in the locked position
D.disconnect the limit switch
第8题
The crank pin journal is provided with large bores for _____.
A.lubrication
B.cooling
C.balancing purpose
D.ventilation
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