When the required minimum clearance for a vent con...

Gas Fitter 2 Practice Test

Question Number 51

When the required minimum clearance for a vent connector is 9" (228 mm) to combustible material with no protection, what is the acceptable method to reduce the clearance by 3" (76 mm)?

A. use 0.05" (12 mm) insulating millboard spaced out 0.05 (12 mm) with noncombustible spacers

B. use 0.25" (6 mm) insulating millboard spaced out 1" (25 mm)

C. use 22 gauge sheet metal attached to the hot side of the-combustible material

D. use 28 gauge sheet metal spaced out 1" (25 mm) from the combustible material

✔ Correct Answer:

B. use 0.25" (6 mm) insulating millboard spaced out 1" (25 mm)

Gas Fitter 2 Practice Test

Question Number 51

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