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International Code Council Commercial Mechanical Inspector Sample Questions:

1. To test for tightness, a consumer's gas piping should never be filled with:

A) inert gas.
B) air.
C) oxygen.
D) dry air.

2. Given: a six-story, sprinklered, multifamily building with a continuously ventilated shaft extending vertically from the first floor to the roof and used for exhaust.
Which of the following requirements must also be met?

A) kitchen exhaust that penetrates the shaft without a fire damper and extends vertically 22 inches.
B) fire dampers are installed that are connected to an emergency generator rated for 1 hour.
C) have steel subducts with wall thickness of 0.0186 inch extending 22 inches horizontally into the shaft.
D) kitchen exhaust that penetrates the shaft without a fire damper and extends vertically 12 inches.

3. Exhaust outlets that terminate at a temperature exceeding 600°F shall be designed as a:

A) Class I duct.
B) single-wall metal chimney.
C) Class II duct.
D) Class III duct.

4. Infrared radiant heaters shall be installed:

A) in accordance with UL 2158.
B) with clearances from combustible material in accordance with the manufacturer's installation instructions.
C) with a 6-ft. clearance on all sides.
D) in accordance with UL 1240.

5. Given: An industrial water heater boiler has a manufacturer's listing of 18 inches wall clearance. It is installed with a protective wall assembly of 24-gauge sheet metal spaced out 1 inch from the wall.
The reduced installation clearance from the wall for this appliance is _____ inches.

A) 12
B) [option text not fully visible in the material you sent]
C) 18
D) [option text not fully visible in the material you sent]

Solutions: