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【单选题】

Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.

A、main bearings

B、connecting rod bearings

C、piston pin bushings

D、All of the above

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更多“Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.”相关的问题

第1题

[] We are going to carry out an/a （）(应急演习).

A、A. fire drill B、B. emergency drill C、C. boat drill D、D. abandon ship drill

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第2题

[单选题] To prevent accidents from occurring, special valve chests are used in such cases in which interchangeable blanks and connecting passages are incorporatedThe bold and italic word “which” means （）.

A、accidents B、special valve chests C、interchangeable blanks D、connecting passages

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第3题

[单选题] （）(除了) the fire drill, there are also boat drill and emergency drill on board.

A、Except B、Although C、In addition to D、But

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第4题

[单选题] We are going to carry out an emergency （）.

A、practise B、practice C、drill D、drills

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第5题

[单选题] Apart from fire drill, there are also boat drill and emergency drill on board.（）

A、除了救生演习之外，船上还有消防演习和应急演习。 B、除了应急演习之外，船上还有救生演习和消防演习。 C、除了消防演习之外，船上还有救生演习和应急演习。 D、除了救生演习之外，船上还有应急演习和消防演习。

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第6题

[单选题] On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.

A、a spindle lubricator B、an oil jet C、internal splashing D、drilled passages in the crankshaft

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第7题

[] A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.

A、A.lifts B、B.collars C、C.elevators D、D.clamps

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第8题

[] A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.

A、A.drill stem guide B、B.guide frame C、C.drill string frame D、D.casing guide

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第9题

[单选题] The essence of an abandon ship drill is that the survival crafts are manned and operated by the crew members assigned to them on the（）

A、tire control plan B、fire drill C、muster list D、All of the above

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