单项选择题
A synonym for chloroform is（）.
A.trichloromethane
B.sulfuric chlorohydrin
C.chlorine gas
D.4-methyl phenol
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相关考题
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单项选择题
A safe fuel system must（）.
A.prevent engine overheating
B.have proper air/gasoline fuel mixture ratio
C.be liquid- and vapor-tight
D.supply sufficient air to the intake manifold -
单项选择题
A petroleum liquid has a flash point of 135°Fahrenheit. This liquid is classed as a grade （）.
A.B flammable liquid
B.C flammable liquid
C.D combustible liquid
D.E combustible liquid -
单项选择题
A flame screen（）.
A.permits the passage of vapor but not of flame
B.prevents the passage of flammable vapors
C.prevents inert gas from leaving a tank
D.permits vapors to exit but not enter a tank
