單項(xiàng)選擇題A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? ()

A.In the lower level of the pumproom
B.In the middle level of the pumproom
C.In the upper level of the pumproom
D.On the deck outside the pumproom


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2.單項(xiàng)選擇題A predictable result of a vessel nearing a bank or edge of a channel is that the().

A.stern is drawn to the bank as the bow sheers off
B.bow sheers toward the bank
C.vessel continues in a straight line,but with greatly reduced maneuverability
D.vessel will be drawn bodily into the bank unless the engines are stopped

3.單項(xiàng)選擇題A precaution you should take before bunkering is to () .

A.plug the vents
B.plug the sounding pipes
C.plug the scuppers
D.close the lids on the vents

4.單項(xiàng)選擇題A position that is obtained by using two or more intersecting lines of position taken at nearly the same time,is a(n) ().

A.fix
B.running fix
C.estimated position
D.dead-reckoning position

5.單項(xiàng)選擇題A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) ().

A.estimated position
B.dead reckoning position
C.fix
D.None of the above