單項(xiàng)選擇題A metal ring on the bottom of a block，to which the standing part of a tackle is spliced，is known as a(n)（）.

A.becket
B.loop
C.swivel
D.eye


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2.單項(xiàng)選擇題A metal eye spliced into a wire is called a（）.

A.cyclops
B.fish eye
C.thimble
D.chip

3.單項(xiàng)選擇題A ketch is a sailing vessel with（）.

A.one mast
B.two masts: with the mizzen stepped abaft the rudder post
C.two masts: with the mizzen stepped forward of the rudder post
D.two masts: a foremast and a mainmast

4.單項(xiàng)選擇題A gypsy or gypsyhead is a（）.

A.punt used for painting over the side
B.small，reciprocating steam engine
C.spool-shaped drum fitted on a winch
D.swinging derrick

5.單項(xiàng)選擇題A flounder plate，on a topping lift，is（）.

A.a fairlead block
B.a swivel pin for the topping lift block
C.a triangular steel plate with a hole at each corner
D.the lower block of a multiple part topping lift