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RCDD-001 · Question #305

What is the air change requirement for a tunnel of 610 m (2000 ft) long with a diameter of 3.4 m (11 ft)?

The correct answer is C. Three complete air changes per hour. See the full explanation below for the reasoning.

Question

What is the air change requirement for a tunnel of 610 m (2000 ft) long with a diameter of 3.4 m (11 ft)?

Options

  • AOne complete air change per hour
  • BTwo complete air changes per hour
  • CThree complete air changes per hour
  • DFour complete air changes per hour
  • EFive complete air changes per hour

How the community answered

(26 responses)
  • A
    4% (1)
  • B
    4% (1)
  • C
    81% (21)
  • D
    12% (3)

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Full RCDD-001 Practice