單項選擇題A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a().

A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange


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1.單項選擇題A set of interior steps on a ship leading up to a deck from below is known as().

A.a companion way
B.tween-decks
C.stairs
D.Any of the above are acceptable

2.單項選擇題A measurement device for inspecting anchor chain is the().

A.slide rule
B.go-no-go gauge
C.derrick tape
D.amp probe

3.單項選擇題A design modification of an anchor chain which prevents kinking is the().

A.detachable link
B.stud link
C.Kenter link
D.connecting link

5.單項選擇題A contra-guide is a type of().

A.bow thruster
B.cargo gear
C.steering engine
D.rudder