單項選擇題During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）

A.Reduce the pumping rate by closing the deck filling valve
B.Close all overflow valves
C.Place 5 gallon containers under all flange connections in the fuel line
D.Reduce the pumping rate and sound tanks frequently as the level rises


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1.單項選擇題Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（）

A.Increased viscosity of the product needs higher loading pressure, which increases the chances of a spill
B.Air pockets may cause the fuel to bubble out of the ullage hole
C.The temperature rise of the fuel will cause an overflow
D.Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened

2.單項選擇題In order to release CO2 to the machinery spaces from a fixed fire extinguishing system, you must（）.

A.actuate an alarm and open the engine room control valve
B.actuate an alarm and open the engine room CO2 releasing valve
C.open the engine room control valve and shut off engine room ventilation fans
D.open the engine room control valve and then the CO2 releasing valve

3.單項選擇題To prevent the overflow of cargo tanks due to expansion, you should top off （）.

A.to the bottom of the expansion trunk
B.to within 1% to 3% of its capacity
C.to within 1% to 3% inches of its capacity
D.1 to 3 inches from top of the vent pipe

4.單項選擇題After taking on fuel oil, the hoses should be disconnected and （）.

A.draped over the fantail to dry out
B.drained over the side and washed out
C.drained into the bilges and washed out
D.drained into buckets or fuel tanks

5.單項選擇題Your ship has run aground and it is necessary to determine whether or not a compartment has floodedTherefore, you should （）.

A.open the watertight door and take a quick look
B.open the hatch dogs on the side away from the hinges
C.tap the bulkhead with a hammer to check for a water level
D.feel the bulkhead to see if it is hot