1. Before the crane works, loosen the anchoring device so that it has no hook with the ground.

2. The electrical equipment of the bridge crane includes motors of various mechanisms, braking electromagnets, (operating) electrical appliances and protective electrical appliances.

3. Open-air cranes should be equipped with track clamps, anchoring devices or iron shoes.

There are usually two kinds of hooks: (forged) hooks and plate hooks.

5. The basic parameters of the crane are the characteristics of the crane.

6, all lifting machinery should have good braking device, (limit device), alarm sound and necessary lighting equipment.

7, all lifting machinery should be in accordance with the provisions of the maintenance cycle, maintenance on schedule, it is forbidden to use in spite of illness. 8. When two cranes are working on the same runway, they should sound the alarm before approaching 2m.

9. Before the crane driver enters the cab, he must confirm that there is no operation outside the cab, on the shelf and on the runway, and then carry out (power-on operation), and ring a bell to warn before operating and moving the train.

10, the crane driver must check all parts, including the cab (electrical equipment), hook and wire rope, before taking over.

Second, multiple-choice questions:

1, lifting machinery operators must pass the safety examination and hold (c).

A. Employment certificate B. Certificate of approval C. Equipment operation certificate D. Driver's license

2. When two cranes work on the same runway, their mutual distance shall not be less than (b).

A. 1m B.2m C.3m D.4m

3. When the crane tries to lift heavy objects, the distance between the lifted objects and the ground shall not be greater than (b).

A.0.2m B.0.5m C. 1m D.2m

4, under normal circumstances, the cart should not reverse, in order to avoid major accidents and reverse, can only put the controller in the opposite direction (A).

A. Level 1 B. Level 2 C. Level 3 D. Level 4

5. When lifting the workpiece, keep the wire rope vertical. When turning a workpiece, it is not allowed to use a cable-stayed crane larger than (a).

A.5 degree angle B. 15 degree angle C. 30 degree angle D. 45 degree angle