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Before replacing a piston you should check that all rings are ___.
A.free
B.fastened
C.broken
D.stuck
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单选题Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible （）.A
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单选题Before letting the anchor go，you should check that the（）.A
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单选题Before replacing a piston you should check that all rings are （）.A
freeB
fastenedC
brokenD
stuck
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单选题In a diesel engine, when installing new piston rings it is important to check（） Ⅰ.ring gap clearance Ⅱ.side clearanceA
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单选题Which safety check（s）should be made before letting go the anchor（）.A
See that the anchor is clear of obstructionsB
See that the chain is all clearC
See that the wildcat is disengagedD
All of the above
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