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Engine_2014 : Engineering Safety - 1237/2355
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The "flammable limits" of an atmosphere are the __________.
A) two temperatures between which an atmosphere will self- ignite
B) upper and lower percentage of vapor concentrations in an atmosphere which will burn if an ignition source is present
C) upper and lower pressures between which an atmosphere will  not burn
D) two temperatures between which an atmosphere will burn if an ignition source is present
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