Penna. Mine Officials' Exam Practice Tests
Gas Detection & Ventilation - Module 6

Progress Indicator:
Question 1 of 25

1.  Crosscuts between intake and return air courses shall be kept closed by permanent stoppings, except:

Choices:
  1. When moving equipment
  2. The one nearest the face
  3. The two nearest the face
  4. When the district mine inspector gives written permission to leave them open

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