单项选择题
Which of the listed characteristics can be applied to R- 12 vapor?（）
A.It is corrosive
B.It is odorless
C.It is visible as h blue fog
D.It has a distinctive taste
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相关考题
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单项选择题
The percentage of impurities in a specific fuel oil sample is determined by （）.
A.settling in a fuel tank
B.testing in a laboratory centrifuge
C.burning in a calorimeter
D.testing in a closed cup -
单项选择题
If your vessel bums 8 tons of fuel per hour at 15 knots, how many tons per hour will it burn at 18 knots?（）
A.1382 tons
B.1561 tons
C.1600 tons
D.1637 tons -
单项选择题
Which of the following statements is correct concerning the “flash point ” of a liquid?（）
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance, when ignited, will continue to bum
D.It is the temperature at which the released vapors will fall within the explosive range
