2018 M2 Commercial Mechanical Inspector Exam Quiz

Reduced clearance protective assemblies for mechanical appliances, devices, and equipment must not be placed less than __________ from the mechanical appliance, device, or equipment it protects.

Mechanical and gravity outdoor air intake openings must have a minimum horizontal clearance of ___________ from any hazardous or noxious contaminant sources such as vents, streets, alleys, parking lots and loading docks.

In the airflow design method for smoke control systems, the airflow toward the fire must not exceed __________ per minute.

Fire dampers are not required at penetrations in parking garage exhaust or supply shafts that are separated from other building shafts by a minimum of __________ fire-resistance-rated construction.

A nonlisted chimney connector serving a domestic-type oil appliance, labeled for venting with Type L vents, must have a min. clearance of ___________ to combustibles.

Oil-fired unit heaters must be tested in accordance with which of the following standards?

Low-water __________ must automatically stop the combustion operation of the appliance when the water level drops below the lowest safe water level as established by the manufacturer.

Stop valves, in refrigerant piping systems, used with soft annealed copper tubing or hard-drawn copper tubing __________ OD standard size or smaller must be securely mounted, independent of tubing fastenings or supports.

Before connection header trenches are backfilled, the assembled plastic pipe ground-source heat pump loop system must be pressure tested with water at __________ for 15 minutes.

Solar energy system components that contain pressurized fluids must be protected against pressures and temperatures exceeding design limitations with a __________.

Of the following, which is not required on a permit application?

The definition of a location that you cannot access without damage to the finish structure or permanent parts of the building structure.

When appliances or other components require service and roof hatch openings that are within 10 feet of the open side of a walking surface more than 30 inches above the floor, grade below or roof, or the edge of a roof, __________ must be provided.

In an LP-gas dispensing system for motor vehicles, a(n) __________ and a manual shut-off must be located between the dispenser inlet and the pump in the liquid line if the dispenser device is not part of a complete storage and dispensing unit mounted on a common base, but is installed at a remote location.

A 16-inch diameter vent connector for a medium-heat appliance that has an internal area of 190 square inches has a minimum thickness of __________.

A room heater that is unvented may not have more than __________ BTU/h of input rating.

The pneumatic test pressure of a hydrogen piping system must be at least _________ psig.

A liquid fuel vent pipe for a fuel oil piping system must terminate outside of a building a min. of __________ measured vertically or horizontally from any building opening.

Assuming that a fuel gas piping system is designed for pressure of more than 2 1/2 psig, and the system is assembled of 3-inch diameter carbon steel pipe. At what pipe length is outdoor purging required?

If a 90-degree elbow 8-inches in radius is used as a dryer exhaust duct fitting, the equivalent length is __________.