单项选择题

The hinge fitting used to attach the boom to the mast is the（）.

A.gooseneck
B.step
C.swivel
D.pintle

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单项选择题

The heaviest type pallet is the（）.

A.factory pallet
B.shipping pallet
C.stevedoring pallet
D.warehouse pallet

单项选择题

The head of the bend is the（）.

A.top or upstream beginning of a bend
B.bottom or downstream beginning of a bend
C.midpoint or center radius of a bend
D.center line or apex of a bend

单项选择题

The firing of a red star signal may mean（）.

A.This is the best place to land
B.You are seen - assistance will be given as soon as possible
C.Tail block is made fast
D.Slack away