單項選擇題What are the two main types of stud link chain（）.

A.Oil Rig chain and Oil Field Stud Link chain
B.Flash-butt welded chain and Di-Lok chain
C.Flash-butt welded chain and Oil Rig chain
D.Oil Field Stud Link chain and Flash-butt welded chain


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2.單項選擇題The size of wire rope is determined by the（）.

A.number of strands
B.number of wires in each strand
C.circumference
D.diameter

3.單項選擇題The safest procedure used to rig a guy and preventer is to have the guy（）.

A.and preventer have equal stress
B.stronger than the preventer to minimize the danger of separation
C.take a lighter load than the preventer as a safety factor
D.take the stress in case the preventer parts

4.單項選擇題The maximum number of passengers a Vessel may carry（）.

A.is stated on the vessel's Certificate of Inspection
B.is the number authorized in the Navigation Rules
C.depends on the number of lifejackets you carry
D.is the number authorized by your license

5.單項選擇題The ladder shall（）.

A.be secured in a position so that it rests firmly against the ship's side from which the discharge operations are carried out
B.have at least two replacement steps which are secured in position by a method different from that used in the original construction
C.have battens made of hardwood，or other material of equivalent properties，in one piece and not less than 1.80metres long provided at such intervals as will prevent the pilot ladder from twisting
D.have steps made of softwood，or other material of equivalent properties，made in one piece free of knots，having an efficient slip surface