How should you signal the crane operator to move slowly（）.

Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.

Official draft measurements should be（）by authorized persons，agreed by both parties involved.

Which statement comparing a shipboard crane to conventional gear is TRUE（）.

Sudden starts or stops of the boom is likely to cause all of the following except（）.

Pedestal cranes have limit switches to restrict movement of which function（s）（）.

Damage by（）shall not be considered as handling damage.

When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.

The net productivity per gang-hour can be improved through a decrease of（）.

Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.