A、can not be ignited by a spark unless the vapor is in a confined space
B、are nontoxic in all concentrations
C、can not be ignited by a spark unless they are at their auto-ignition temperature
D、are heavier than air
更多“Diesel fuel vapors （）.”相关的问题
A、fuel oil vapor at the sludge tank vent B、unburned fuel vapors in the scavenge air receiver C、lube oil vapors in the crank case D、lube oil vapors in the engine room
A、a shortened ignition delay period B、a lean fuel/air mixture C、excess fuel in the combustion chamber D、rapid vaporization of injected fuel droplets
A、A.a shortened ignition delay period B、B.a lean fuel/air mixture C、C.excess fuel in the combustion chamber D、D.rapid vaporization of injected fuel droplets
A、A.the vapor air mixture is too rich to burn B、B.an explosion may occur if a source of ignition is present C、C.the vapor air mixture is too lean to bum the upper explosive D、D.limit has been exceeded
A、to fuel oil instead of diesel oil B、for fuel oil instead of diesel oil C、to diesel oil into fuel oil D、for diesel oil into fuel oil
A、A.diesel oil instead of fuel oil B、B.fuel oil instead of diesel oil C、C.diesel oil instead fuel oil D、D.fuel oil instead diesel oil
A、Fuel vapors gather in the lowest portions of the vessel B、Fuel vapors can only be ignited by an open flame C、Vent outlets should be located above the level of the carburetor air intake D、None of the above
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