更多"What is used to test a tank for oxy"的相关试题:
[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]Approximately what percent of tank space should be left for expansion of oil due to possible temperature increase?（）
A. 1% to 3%
B. 1% to 2%
C. 4%
D. 2% to 4%
[单项选择]What is head tank in the closed cooling water system used for?（）
A. for the release of air from the cooling water
B. providing expansion room for heated cooling water
C. a place for implementing water and water treatment agent
D. all of the above
[单项选择]Before being used the fuel service tank should be drained of （）.
A. soda solution
B. mechanical impurities
C. ballast
D. water and residuals
[单项选择]Deficient oxygen content inside a chain locker can be detected with（）.
A. litmus paper
B. a combustible gas indicator
C. an oxygen breathing apparatus
D. an oxygen indicator
[单项选择]When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.
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 to the bottom
[单项选择]What is used for preventing pollution damage to the sea from ships?（）
A. MARPOL 73/78
B. SOLAS 74
C. STCW 78/95
D. ISPS 2002
[单项选择]What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
A. Flinders bar
B. Soft iron spheres
C. Fore-and-aft permanent magnets in their trays
D. Heeling magnet
[单项选择]What is used to prevent twisting of a towing bridle?（）
A. A bitt
B. A bulkhead
C. A V-spring
D. A fishplate
[单项选择]What is used as an indicator of initial stability? （）
A. GM
B. KG
C. KM
D. GZ
[单项选择]Head tank should be used to remove （） from cooling water.
A. scale
B. sludge
C. chemicals
D. air
[单项选择]Expansion tank should be used to remove （） from cooling water.
A. scale
B. sludge
C. chemicals
D. air
[单项选择]（） the oxygen content in the exhaust gas, （） the combustion is.
A. The lower；the worse
B. The higher；the better
C. The lower；the better
D. The highest；the worst
[单项选择]Generally, what is used to inflate life rafts?（）.
A. Non-toxic gas
B. oxygen
C. Hydrogen
D. Helium
