單項(xiàng)選擇題Chafing gear is normally used().

A.for portable fenders
B.for ground tackle
C.on the inside of the hawsepipe
D.on mooring lines


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1.單項(xiàng)選擇題Chafing gear is used to().

A.anchor the boat
B.pick up heavy loads
C.protect fiber rope from abrasion
D.strengthen mooring lines

2.單項(xiàng)選擇題Changing direction by bringing the stern of the vessel through the eye of the wind is known as().

A.jibing
B.running before the wind
C.tacking
D.reefing

4.單項(xiàng)選擇題C02 extinguishes a fire by().

A.cooling
B.smothering
C.chemical action
D.All of the above

5.單項(xiàng)選擇題Combustible gas indicators measure the presence of combustible gas a percentage of the().

A.flash point
B.upper explosive limit
C.lower expiosive limit
D.All of the above