Engine : Engineering Safety - 1132/968
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| The explosive range of a mixture of flammable vapors and air lies between the lower and upper explosive limits. These limits are specified as a percentage of __________. |
| A) the lower limit of explosibility of the mixture |
| B) the temperature of the flash point |
| C) oxygen present to support combustion |
| D) flammable vapor by volume in air |
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