单选题Which will cause a wire rope to fail（）.A Using a medium graphite grease as a lubricantB Operating a winch too slowC Using a sheave with an undersized throatD A sheave diameter of 24 times the wire's diameter

Which molten substance is poured into the basket of a wire rope socket being fitted to the end of a wire rope ________．

A.Babbitt

B.Bronze

C.Lead

D.Zinc

Galvanizing would be suitable for protecting wire rope which is used for ______.

A.cargo runners

B.stays

C.topping lifts

D.All of the above

Which statement concerning the lashings of containers with solid bar or wire rope lashings is TRUE ________．

A.Stack weights should be less when using a solid bar lashing as compared to a wire lashing

B.Stack heights may be increased when using a solid bar lashing

C.Stack heights should be reduced when using a solid bar lashing

D.Solid bars should be used for lashing the first tier only，with wire lashings on the higher tier（s）

What is the accepted standard for wire rope falls used in connection with the lifeboat gear ________．

A.Six by seven galvanized wire rope

B.Six by twenty-four improved plow steel wire rope

C.Six by thirty-seven preformed fiber-core wire rope

D.Six by nineteen regular-lay filler wire rope

Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane ________．

A.Taglines are wire rope purchases that raise and lower the jib

B.Taglines are wire ropes for horizontal positioning of the rider block

C.Taglines can be fastened to corners of vehicles or containers

D.The crane might not have taglines installed in its rigging system