單項(xiàng)選擇題In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system , there must be（）.

A.fuel
B.oxygen
C.ignition
D.All of the above


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1.單項(xiàng)選擇題In order to correctly open a new coil of manila line,you should（）.

A.pull the tagged end from the top of the coil
B.pull the tagged end through the eye of the coil
C.secure the outside end unroll the coil
D.unreel the coil from a spool

2.單項(xiàng)選擇題In order to detect rot in manila lines,you should（）.

A.feel the surface of the line for broken fibers
B.measure the reduction in circumference of the line
C.observe any mildew on the outer surface
D.open the strands and examine the inner fibers

3.單項(xiàng)選擇題In order to discharge a C02 portable fire extinguisher , the operator must first（）.

A.invert the CO extinguisher
B.squeeze the two trigger handles together
C.remove the locking pin
D.open the discharge valve

4.單項(xiàng)選擇題In order to help protect a natural fiber rope from rotting , the line must be（）.

A.dried , and stowed in a place with adequate ventilation
B.stowed in a hot , moist compartment
C.stowed on deck at all times
D.stowed in any compartment

5.單項(xiàng)選擇題In order to retrieve an inflatable life raft and place it on deck , you should heave on the（）.

A.lifelines
B.righting strap
C.sea anchor
D.towing bridle