更多"A SYSTEM OF CLEANING THE TANKS BY W"的相关试题:
[单项选择]A system of cleaning the tanks by washing them with the cargo of crude oil while it is being discharged is known as（）.
A. cow
B. lot
C. cbt
[单项选择]Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.
A. gooseneck vents and flame screens
B. pressure-vacuum relief valves
C. branch vent lines and a vent header
D. forced draft blowers
[单项选择]Sea water temporarily pumped into tanks to simulate the increased vertical loading of environmental forces is termed（）.
A. preload
B. liquid variable load
C. fixed load
D. basic load
[单项选择]Prior to backloading portable tanks or drums onto an offshore supply vessel，check that each tank is（）.
A. painted yellow with diagonal black striping
B. capped and checked for leaks
C. coated with non-corrosive protection
D. mounted on pallets
[单项选择]Special stowage in deep tanks is obviously required for（）.
A. liquid commodities in containers
B. bottled liquid commodities
C. common liquid commodities in bulk
D. liquid commodities in cylinders
[单项选择]Standby or emergency diesel generator day tanks should always be kept full to reduce the possibility of（）
A. sediment contamination
B. fuel filter clogging
C. moisture formation
D. inadequate transfer pump suction head
[单项选择]Gasoline tanks should be filled（）.
A. to the top to expel all vapors from the tanks
B. to the top so the operator is certain how much fuel he has aboard
C. with only sufficient fuel for the planned trip so excess gasoline is not carried
D. to near the top with some space allowed for gasoline expansion
[单项选择]Increasing the number of slack liquid tanks has the effect of raising the（）.
A. uncorrected KG
B. maximum allowed KG
C. virtual height of the center of gravity
D. metacentric height
[单项选择]Increasing the number of slack liquid tanks has effect of raising the（）.
A. uncorrected KG
B. maximun allowed KG
C. virtual height of the center of gravity
D. metacentric height
[单项选择]Crude oil washing of cargo tanks has the following advantages except for （）
A. reducing the erosion of the cargo tanks
B. increasing the total quantity of oil to carry
C. reducing the quantity of water contained in oil
D. reducing cargo discharged time
[单项选择]Those ship’s tanks that are particularly important for trimming the ship are the（）.
A. domestics
B. settlers
C. deeps
D. peaks
[单项选择]The existence of liquids in partially full tanks or compartments of a ship causes a virtual rise in the height of the（）.
A. metacenter
B. center of buoyancy
C. center of flotation
D. center of gravity
[单项选择]You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? （）
A. Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned
B. The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank
C. The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue
D. Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
[单项选择]Where tanks are arranged for either oil or ballast （） must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank.
A. a sea water chest
B. a change-over chest
C. a buffer tank
D. a three-way valve
[单项选择]Where should the tops of vents from gasoline tanks terminate?（）.
A. In open air
B. Inside cabins near the overhead
C. In the machinery space near the engine air intake
D. Underwater
[单项选择]Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.
A. a subsequent temperature rise will cause the cargo to overflow
B. air pockets may cause the cargo to bubble out of the ullage hole
C. the increased viscosity of the product requires higher loading pressure which increases the chances of a spill
D. the tank valve may be stiff and a spill will occur before the valve can be closed
