單項(xiàng)選擇題

All items such as steam pipes, exhaust pipes and fittings which, because of their location and operating temperature, present a hazard should be adequately lagged.That means the items should（）

A.not be put into operation too early
B.be pay adequate attention to
C.be used only when necessary
D.be coated with certain material

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單項(xiàng)選擇題

In machinery space, the valves, pipes should be（）

A.arranged as close to each other as possible to save space
B.arranged far away from each other for convenient operation
C.be fixed or clamped to avoid vibration
D.kept easy removable as to convenient repairing work

單項(xiàng)選擇題

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）

A.stays at rest
B.is working stably
C.is worn out
D.is in good operation

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All items such as steam pipes, exhaust pipes and fittings which, because of their location and operating temperature, present a hazard should be adequately lagged.That means the items should（）

你可能感興趣的試題

In machinery space, the valves, pipes should be（）

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）