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【判断题】
钢加热到奥氏体后，加热温度越高，保温时间越长，奥氏体晶粒越细小。A.
正确
B.
错误
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举一反三
【简答题】请根据以下内容回答 90～91 题： 第 90 题 于强壮保健的要穴是（ ）
【单选题】The fresh air intake of the inert gas system（）.
A.
prevents the flue gas from falling below 3% content of oxygen
B.
allows the inert gas piping to be used for gas freeing the tanks
C.
opens when there is excessive vacuum on the deck water seal
D.
enables outside air to mix with and cool hot flue gasses
【单选题】The purpose of the deck seal in an inert gas system is to prevent（）.
A.
flammable vapors from entering machinery space
B.
flue gas escaping to atmosphere
C.
inert gas escaping to atmosphere
D.
air entering inert gas system
【单选题】SOLAS regulations require that the inert gas system shall be capable of delivering inert gas with an oxygen content of not more than what percentage?
A.
5%
B.
8%
C.
6%
D.
3%
【单选题】The deck water seal of the inert gas system ______．
A.
Cools the inert gas and prevents soot from entering the cargo tanks
B.
Acts as an emergency shutdown when inlet pressures exceed the safe working pressure
C.
Prevents the backflow of hydrocarbon gasses into nonhazardous areas
D.
Relieves sudden large overpressures in the system
【单选题】What is NOT a function of the scrubber of an inert gas system ________．
A.
Cool the inert gas
B.
Remove particulate matter like soot
C.
Maintain pressure in the tanks
D.
Remove chemical impurities
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