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

When using slings，cargo handlers should take all the following precautions except（）.

When discharging an oil cargo，the first consideration is to（）.

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.

Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.

What does “evel-luffing” accomplish during crane operations（）.

Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.

How should you signal the crane operator to hoist（）.