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RCDD-002 · Question #296

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

(49 responses)

A
6% (3)
B
2% (1)
C
71% (35)
D
16% (8)
E
4% (2)

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