2024 ICC M1 Residential Mechanical Inspector Exam Quiz

In vented floor furnaces, the furnace register must be located a min. of __________ below any projecting combustible materials.

Piping for a secondary drain or auxiliary drain pan required for a cooling or evaporator coil, must maintain a min. horizontal slope in the direction of discharge a min. of __________.

Clothes dryer exhaust ducts must not be joined with screws that protrude more than __________ into the inside of the duct.

Metal ducts in underground duct systems must be protected from corrosion in an approved manner or must be completely encased in concrete a min. of __________ thick.

Return air openings for heating, ventilation and air conditioning systems must be located a min. of __________ from an open combustion chamber or draft hood of another appliance in the same room or space.

The horizontal run of an uninsulated connector to a natural draft chimney must not exceed what percentage of the height of the vertical portion of the chimney above the connector?

Unless otherwise specified, gas piping systems installed underground must be at least __________ inches below grade.

In garages, appliances that have an ignition source must be elevated such that the source of ignition is not less than __________ above the floor.

Exhaust systems capable of exhausting more than __________ must be mechanically or passively provided with makeup air at a rate approximately equal to the exhaust air rate.

Condensate piping from cooling coils and evaporators must maintain a minimum horizontal slope __________ in the direction of discharge.

Clothes dryer exhaust ducts must be supported at maximum intervals of __________.

Gas-fired appliances must be provided with combustion air that complies with __________.

Natural draft gas vents serving wall furnaces must terminate at a minimum elevation of __________ above the bottom of the furnace.

Hydronic piping systems must be tested hydrostatically at a pressure of 1-1/2 times the maximum system design pressure, but not less than 100 psi for a minimum duration of __________.

Supply piping used in the installation of oil burners and appliances must be a min. of __________ pipe.

What is the max input rating of an unvented room heater?

A ground source heat pump loop system shall be pressure tested with water for __________ minutes with no observed leaks prior to the backfilling of the connection trenches.

The cross sectional area of a chimney flue connected to a solid-fuel-burning appliance shall be a maximum of _______________ times the area of the flue collar, unless specified otherwise in the manufacturer’s installation instructions.

If a fuel-gas appliance requires a minimum clearance without protection 1 of 36 inches above the appliance to combustible material, and has a 1/2 -inch thick insulation board over 1-inch glass fiber batts as protection, the minimum clearance may be reduced to _______________.

Return air can be taken from a kitchen, so long as the air openings are located a min. of _____ from the cooking appliances and only serve the kitchen.