Engine_2014 : Engineering Safety - 845/2355
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| If personnel are required to enter a cargo tank that has not been certified as "gas free", __________ . |
| A) entry without a breathing apparatus may be made at the top of the tank, since petroleum vapors are heavier than air |
| B) a person may work safely without breathing apparatus in cold weather, since the vapors are less volatile |
| C) breathing apparatus would not be necessary, if expected to be in the tank for only a short period of time |
| D) self-contained breathing apparatus should always be used |
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