更多"By regulation，cargo tank atmosphere"的相关试题:
[单项选择]By regulation, cargo tanks must be inert before and during what operation?（）.
A. Stripping
B. Loading
C. Cleaning
D. Crude oil washing
[单项选择]By regulation，cargo tanks must be inert before and during what operation?（）.
A. Stripping
B. Loading
C. Cleaning
D. Crude oil washing
[单项选择]To determine which grades of cargo a tank vessel is permitted to carry you should（）.
A. refer to the vessel's Certificate of Inspection
B. examine the cargo tanks and fittings
C. ask the terminal supervisor or his representative
D. check the loading order
[单项选择]Hoses used for cargo transfer operations must be tested abdinspected at specified intervals by （）.
A. a representative of the Captain of the Port
B. the operator of the vessel or facility
C. a representative of the National Cargo Bureau
D. a representative of the American Bureau of Shipping
[单项选择]When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.
A. one meter from the tank bottom and one meter below the tank top
B. one half the ullage of the tank and one meter below the tank top
C. one half the ullage of the tank and one meter above the tank bottom
D. at three meter intervals from the tank top
[单项选择]How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.
A. With gooseneck vents
B. With warning signs
C. With flame screens
D. With pressure-vacuum relief valves
[单项选择]Regulations require that cargo pumprooms on tank barges (constructed in 1965) carrying grades B or C liquid cargoes have power ventilation systems which can completely change the air in （）.
A. 1 minute
B. 3 minutes
C. 5 minutes
D. 10 minutes
[单项选择]You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? （）
A. Cut in another IG fan to increase gas flow
B. Open the pressure control valve until the pressure increases
C. Open the tank isolation valve to the fully open position
D. Reduce the pumping rate
[单项选择]While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.
A. enter the tank safely
B. suspect the accuracy of the reading
C. ventilate the tank
D. test for nitrogen
[单项选择]You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE? （）
A. The tank contains propylene
B. The tank's volume is 1077 cubic feet
C. There are three tanks in the shipment
D. The tank contains an oxidizing material
[单项选择]Every（）shall be fitted with a cargo tank cleaning system using crude oil washing.
A. existing crude oil tanker of 20000 tons deadweight and under
B. new crude oil tanker of 20000 tons deadweight and under
C. existing crude oil tanker of 20000 tons deadweight and above
D. new crude oil tanker of 20000 tons deadweight and above
[单项选择]Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.
A. 5% or less
B. 10% or less
C. 15% or less
D. 20% or less
[单项选择]A cargo tank that is initially gas freed，can be inerted by introducing inert gas by a process known as（）.
A. dilution
B. displacement
C. precipitation
D. Either A or B
[单项选择]（）shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions.
A. A load on top system
B. Direct line system
C. Circle line system
D. An inert gas system
[单项选择]Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure（）.
A. nitrogen
B. oxygen
C. carbon dioxide
D. water vapor
