Section 300: Electrical Test No. 3
Practice test questions for the PA Mine Officials' Exam

Progress Indicator:
Question 1 of 15

1.  If methane gas is found at _______ or greater, the individual in charge shall immediately stop the machine, cut off the current at the nearest switch and report the matter to a mine official.

  1. 1.0%
  2. 1.5%
  3. 2.0%
  4. none of the above

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