單項選擇題Blocks and falls used as lifeboat gear must be designed with a minimum safety factor of（）.

A.4，based on the breaking strength
B.5，based on the maximum allowable stress
C.6，based on the maximum working load
D.8，based on the normal working load


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題BHP stands for the（）of the main engine.

A.breadth dimension
B.builder's name
C.brake horsepower
D.revolutions per minute

2.單項選擇題Before starting to hoist provisions，which should be checked?（）

A.Hoist rope is not kinked
B.Multiple part lines are not twisted around each other
C.The hook is centrally located over the load
D.All of the above

3.單項選擇題Before operating a non-oceangoing ship greater than 100 gross tons it must have a fixed piping system to discharge oily mixtures ashore. This system must include（）.

A.approved oil-water separating equipment
B.a fixed or portable containment system at the shore connection
C.a spare pump in case the main pump is inoperative
D.at least one outlet accessible from the weather deck

4.單項選擇題An instrument useful in predicting fog is the（）.

A.sling psychrometer
B.microbarograph
C.anemometer
D.aneroid barometer

5.單項選擇題An advantage of nylon rope over manila rope is that nylon rope（）.

A.can hold a load even when a considerable number of the yarns have been abraded
B.can be stored on deck，exposed to sunlight
C.can be used in conjunction with wire or spring-lay rope
D.gives audible warning of overstress whereas manila does not