HVAC Code Practice Test Practice Exam

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• The Minnesota Code is based on the 2012 International Mechanical Code. Which statement correctly identifies this basis?
• The minimum and maximum opening size for a louver, grille or screen located on a residential intake opening is _____.
• All interior surfaces of the exhaust system shall be accessible for _______ and inspection purposes.
• Where an opening of the size specified is not possible, openings large enough to permit thorough cleaning shall be provided at _______ intervals.
• Combustion air shall not terminate in the return air plenum of a forced air heating system, unless installed in accordance with the ______.
• Where provided, drains shall be _______ to the exhaust duct or listed grease duct drains, in accordance with the terms of the listing and the manufacturer's installation manual.
• Cooking appliances designed, tested, listed, and labeled for use in commercial occupancies shall
• Access panels shall be the same _______ and _______ as the duct.
• Powered make-up air may be acquired through a duct located within how many feet of an exhaust termination?
• Which damper is required at the termination point of a mechanical exhaust discharge?
• Which department records the details of actions granting approval of alternate materials?
• Clearances for servicing all unit heaters shall be______.
• The gasket or sealant used on access panels shall be rated at _______ and shall be greasetight.
• A grease duct installed within a rated enclosure shall maintain an air pressure of at least _____ water column positive pressure for _____ minutes when an air test procedure is used.
• How should appliances serving different areas of a building be marked?
• The code's authority relative to municipal codes is that it ____.
• Listed direct-vent equipment shall be considered properly vented when installed in accordance with the ______ and the Minnesota Fuel Gas Code.
• Internal hood joints, seams, filter support frames, and appurtenances attached inside the hood shall be _______ or otherwise made greasetight.
• A Type II hood is a kitchen hood used for the collection of ____.
• Unless otherwise permitted, a mechanical system lawfully in existence at the time of adoption of the Mechanical Code ____.
• The condensate and drain line size is specified in terms of inside diameter. Which option correctly states the required size?
• Unvented infrared heaters may be installed only if mechanical ventilation is provided at least 4 CFM per 1000 Btu/h input and the heater is electrically interlocked.
• A volume damper shall not be placed in the air inlet to a furnace in a manner that will ______.
• Hangers and brackets supporting unit heaters shall be made of what material?
• Which requirement applies to the exhaust system for a ceramic kiln?
• Work requiring a rough-in inspection would include all except____.
• A draft hood for a duct furnace shall be located ______.
• Ducts which serve a Type I hood in buildings more than one story in height, shall be enclosed in a continuous enclosure with a fire resistance rating of not less than _______, from the first fire rated barrier to the exterior of the building.
• Unvented room heaters and unvented decorative appliances ______.
• All ducts shall be installed with a minimum _______ percent slope on horizontal runs up to 75 ft. and a minimum _______ percent slope on horizontal runs greater than 75 ft.
• A draft hood, or barometric draft regulator, shall be in the same room as the equipment served and the ______.
• Where enclosures are not required, hoods, grease removal devices, exhaust fans, and ducts shall have a clearance of at least _______ in. to combustible material, _______ in. to limited-combustible material, and 0 in. to noncombustible material.
• For copper piping 1-1/4 inch or smaller, what is the maximum vertical spacing?
• What is the minimum exterior opening free area required for a single outdoor combustion air opening if the total equipment input is 120,000 Btu/h?
• A 100,000 Btu/h forced-air furnace has an 80,000 Btu/h output rating. The minimum unobstructed area of the supply ducts must not be less than ______ square inches.
• Type II hood materials shall be constructed of _____.
• A fan-assisted appliance is _____.
• If there is a conflict between a general requirement and a specific requirement, the ____ requirement applies.
• The volume required for combustion air obtained from indoors is determined by using which method?
• Unless permitted by the manufacturer, the maximum length of a domestic dryer exhaust duct shall not exceed ____ feet from the transition duct connection to the outlet terminal.
• Which statement correctly describes the required conformity for additions, alterations or repairs?
• Which would not be a prohibited location for a fuel-fired, atmospherically-vented appliance?
• Ceiling mounted appliances located in public garages, service stations and repair garages _____.
• Devices or safeguards required by code must be maintained to the code edition under which they were installed.
• In the design of a system that includes a direct-fired makeup air heater, which provisions are required?
• Clothes dryer exhaust duct material requirement is that it must be constructed of metal with a smooth interior surface.
• Access opening width for a dwelling appliance located in a compartment must be at least how many inches?
• For dampers in combustion air ducts, the interlock should be designed to do what?
• Which statement about additions, alterations or repairs to a mechanical system is true?
• The total area of supply duct openings is not required to be larger than the minimum size specified by which source?
• If personnel entry is not possible, adequate access for cleaning shall be provided on each floor.
• Occupied spaces shall be ventilated _____.
• For copper piping 1-1/4 inch or smaller, what are the maximum horizontal and vertical spacings?
• No portion of any mechanical system for which a permit is required, by the mechanical code shall be concealed until _______.
• An exhaust duct in a heated space requires insulation a minimum of _______ feet from the duct outlet.
• Which option correctly states the termination distances for environmental air duct exhaust from a property line and from openings into the building?
• Single wall chimney or vent connectors shall be fastened with a minimum of _______ equally spaced screws.
• Suspended type unit heaters shall be installed with clearances to combustible materials of not less than ______ inches at the sides.
• Combustion air shall not terminate in the return air plenum unless installed in accordance with the heating equipment manufacturer's installation instructions.
• Which component shall not be used?
• Makeup air and ventilation air supply diffusers located within _____ ft. of an exhaust hood shall be directed away from the hood.
• The gasket or sealant used on access panels must be rated at _______.
• A mechanical outside air intake must be located a minimum of 10 feet below a source of contaminant located within 3 feet.
• The purpose of the code is to provide ____ to safeguard life and limb, health, property and public welfare by regulating and controlling the design, construction, quality of materials, use and occupancy, location and maintenance of structures and equipment covered by the code in a jurisdiction.
• Masonry chimneys must have a lining system when each appliance has a minimum less than ______ Btu/h.
• Single wall metal pipe shall not originate in any ______, or concealed space.
• The Mechanical Code regulates the design, installation, ____, ____ and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings.
• A venting system that removes vent gases under non-positive static pressure is also known as a _____.
• Where a change in roof elevation greater than _____ inches but not exceeding _____ feet exists, a permanent ladder shall be provided.
• Direct-fired makeup air heaters shall not be used to supply any area containing ______.
• The total area of the supply air ducts in a forced-air heating system shall
• Which statement is correct regarding the installation of a unit heater attached to a warm air duct system?
• Which term describes air required for complete combustion of a fuel?
• The code supersedes the building code of any ____.
• Internal hood joints, seams, filter support frames, and appurtenances attached inside the hood shall be Sealed or otherwise made greasetight.
• If a mechanical system is determined hazardous, written notice must be given within how many hours and to whom?
• All such equipment and its performance shall be maintained in accordance with the requirements of _______ during all periods of operation of the cooking equipment.
• Exposed rectangular ducts of 14 inches or less, when serving a single dwelling unit, shall be constructed of _______ gauge steel.
• If different provisions specify different materials, methods of construction, or other requirements, the most restrictive provision governs.
• Combustion air is required for _______.
• When a correction notice is ignored and a violation citation is issued, it is considered a____.
• Guards shall be provided where appliances, equipment, fans or other components that require service are located within how many feet from a roof edge?
• Which code governs explosion control systems in Minnesota?
• Mechanical systems, both existing and new, shall be maintained in proper operating condition in accordance with ____ and in a safe and sanitary condition.
• The holder of the permit is responsible for scheduling all of the following inspections except____.
• An example of work exempt from permit requirements is which of the following?
• Powered make-up air _____.
• If different provisions specify different materials, methods of construction, or other requirements, the ____ provision governs.
• If enclosures are not required, what are the minimum clearances to combustible and limited-combustible materials?
• HVAC systems of all structures shall be designed and installed for efficient utilization of energy in accordance with the _____.
• Duct systems shall not be interconnected with any other building _______ or _______ systems.
• Penetrations of floor/ceiling assemblies shall be protected in accordance with which code?
• Exhaust duct insulation in a heated space must be kept at least how many feet from the duct outlet?
• Who is responsible for maintenance of a mechanical system?
• A unit heater shall not be attached to a warm air ducts system unless ______ for such an installation.
• The responsibility for the inspection, testing, maintenance, and cleanliness of the ventilation control and fire protection of the commercial cooking operations shall ultimately be that of the _______.
• Combustion air intake openings shall be located at least 12 inches above adjoining grade level.
• Which class of flexible air duct is permitted in any occupancy covered by the Mechanical Code?
• The use of used materials that meet the requirements of the code for new materials is ____.
• Return air ducts, plenums and concealed spaces may be of combustible construction when serving a dwelling unit.
• Commercial clothes dryer exhaust ducts shall have a minimum clearance of _____ inches to combustible material.
• Drains shall be provided at _______ points in horizontal ducts.
• System balance reports _____.
• Alternative methods and materials shall be approved when the building official finds that the material, method, or work offered ____.
• Fusible links for fire dampers shall have a temperature classification not less than _______ degrees F.
• When a single permanent opening, from the outdoors, is provided for combustion air for natural draft equipment, it shall commence within ______ inches of the bottom of the enclosure.
• A Type B Vent terminating above a roof with a roof pitch of 12/12 must terminate at least ______ feet to the lowest discharge opening.
• Combustion air intake openings shall be located at least ______ inches above adjoining grade level.
• The title of the person whose overall duty it is to enforce the building code for a municipality is called the ____.
• When gypsum materials are exposed in plenums, the air temperature must not exceed _______ degrees F.
• Return air ducts, plenums and concealed spaces may be of combustible construction when _______.
• A mechanical outside air intake must be located a minimum of _____ feet below a source of contaminant located within _____ feet.
• The title of the person responsible for enforcement in a municipality is the building official.
• Which statement best describes the hazard addressed by proper placement of vented wall furnaces?
• When motorized dampers are provided in combustion air ducts, they shall be ______ to prevent operation of the burner when the dampers are not the fully open position.
• Which statement is not true about mechanical exhaust discharge?
• An appliance constructed and installed so that all air for combustion is derived from outdoors and all gas flue gases are discharged to the outdoors is a what?
• What is the minimum inside diameter for the condensate and drain line?
• Grease duct air test parameters require a minimum positive air pressure of _____ water column for _____ minutes.
• Access panels must be of the same _______ and _______ as the duct.
• A flexible air duct is limited to temperatures not exceeding _______ degrees F.
• The details of any action granting approval of ____ shall be recorded and entered in the files of the Department of Building Safety.
• Draft hood equipped and other Category I appliances installed in a dedicated enclosure in which all combustion air is taken directly from outdoors are permissible under which condition?
• When the building official orders a mechanical system be disconnected due to an immediate danger, the disconnection shall be made how?
• An exhaust system for a ceramic kiln must conform to ______.
• The use of used materials that meet the requirements of the code for new materials is.
• Mechanical exhaust systems for enclosed parking garages shall provide a minimum ventilation rate of _____ cfm per square foot of floor area.
• Engineered combustion air installations shall provide adequate supply of ______ air and be approved by the building official.
• Exterior combustion air openings must have a corrosion resistant screen of not less than 1/4 inch.
• Bored holes in any load bearing wood stud may not exceed _____ percent of the stud depth.
• Combustion air openings on the exterior of a building shall have _______.
• Which term describes a system that draws all combustion air from outdoors and vents all flue gases outdoors?
• Where personnel entry is not possible, _______ for cleaning shall be provided on each floor.
• Which statement best describes the scope of the Mechanical Code?
• Air necessary for the complete combustion of a fuel, including theoretical and excess air is ______ air.
• What is the minimum cross sectional dimension of a combustion air duct?
• The standard method for determining the required volume for combustion air from the indoors is ______ cubic feet per 1,000 Btu/h.
• If there is a conflict between a general requirement and a specific requirement, the specific requirement applies.
• The minimum total area of supply duct openings for a forced-air warm-air furnace is which of the following per 1000 Btu/h output?
• The pipe that connects an approved fuel-fired appliance to a vent is called what?
• Which percentage slope is required for ducts serving a hood?
• Which of the following is an appliance example exempt from combustion air requirements?
• Which statement best describes the scope of the standard regarding cooking operations?
• Which ventilation methods are acceptable for occupied spaces?
• At what height above the floor should the design heating day temperature be maintained?
• Which statement about termination distances for ducts conveying explosive or flammable vapors, fumes or dusts is correct?
• Residential intake louvers opening size must be within which range?
• Flanges and lips of nonstructural cold-formed steel wall studs _____.
• All air handled by a direct-fired makeup air heater shall be taken from ______.
• A fan-assisted appliance must be equipped with which feature?
• Commercial kitchen exhaust systems serving Type I hoods shall be designed, constructed and installed in accordance with which standard?
• Which characteristic best describes a natural draft venting system?
• If a cleaning opening size is not possible, openings shall be provided at intervals of _______.
• The vent connector should slope at least 1/4 inch per foot.
• Environmental air duct exhaust shall terminate _____ ft. from a property line and _____ ft. from openings into the building.
• Which dimension is used to specify condensate line sizes?
• Mechanical ventilation systems shall provide air flow rates within +/- _____% of design capacities.
• Ducts conveying explosive or flammable vapors, fumes or dusts, shall terminate not less than _______.
• Makeup air shall be not less than _____ degrees Fahrenheit, measured at the flow of air from the supply diffuser.
• Which standard governs the maintenance requirements for commercial cooking equipment?
• All seams, joints, penetrations, and duct-to-hood collar connections shall have a liquidtight continuous _______.
• The building Official may issue a ____ to the Owner's Agent or person doing the work if the work being performed in a dangerous or unsafe manner.
• Hangers and brackets supporting unit heaters
• The standard calculation for indoor combustion air volume yields how many cubic feet per 1,000 Btu/h?
• What is the required size for the personnel entry opening on horizontal ducts?
• Type I hoods are required above commercial type ______.
• Makeup air openings shall be located at least ____ inches above adjoining grade level.
• What term describes the joint at seams, joints, penetrations, and duct-to-hood collar connections that shall be liquidtight?
• Outside exhaust openings, including bath, toilet, domestic kitchen range and domestic dryers shall be located at least _____ feet from doors, openable windows and non-mechanical intake openings.
• Outside air exhaust and intake openings for commercial buildings must be located a minimum of _____ feet from a lot line.
• Which of the following sources may return air be taken from?
• An outside air inlet for a forced-air heating system must be at least how many feet below a vent located within 10 feet?
• Where combustion air is provided mechanically, the combustion air shall be supplied at the minimum rate of ______ cfm per 1,000 Btu/h for all appliances located within the space.
• Which enforcement level applies to ignoring a correction notice?
• Vented gas fireplaces (decorative appliances) should be tested and installed except by which standard?
• Which percent free area is allowed for metal louvers used for combustion and dilution air openings?
• Ducts serving a Type II hood shall have not less than a _____% vertical slope toward the hood or toward an approved reservoir.
• Which combination of minimum indoor temperature and height above the floor is specified for the design heating day?
• Vented wall furnaces may
• Engineered combustion air installations must be approved by which authority?
• Which hazard is specifically referenced as something to avoid when performing additions, alterations or repairs?
• What is the minimum number of screws used to fasten a single-wall chimney connector?
• Which statement is true about unvented decorative appliances?
• Exhaust and makeup air systems shall be connected by what?
• A device built into an appliance which is designed to prevent a back draft from entering the appliance is a _______.
• Return air intake for a forced air furnace may be taken from all the following locations except ______.
• In terms of furnace air supply, a volume damper should not be placed in a way that would reduce ______.
• What is the minimum indoor temperature required for spaces intended for human occupancy on the design heating day?
• An appliance located within a compartment in a dwelling unit shall be accessed by an opening or door measuring not less than _____ inches wide.
• A clothes dryer exhaust duct shall be constructed of metal with a smooth interior surface and have a minimal diameter of ______.
• Regardless of the allowable reduced clearance obtained from Table 308.60, protective assemblies shall not be placed less than _____ inches from the mechanical appliances, devices or equipment.
• Openings shall be provided at the sides or at the top of the duct, whichever is more accessible, and at _______.
• Drains shall be located at the lowest points in horizontal ducts to facilitate drainage.
• Rooftop terminations shall be arranged with or provided with the following: The collection container for drainage must be noncombustible, _______, _______, and structurally sound for the service to which it is applied and that will not sustain combustion.
• When a single permanent opening, from the outdoors, is provided for combustion air a vertical or horizontal duct shall have a minimum free area of 1 square inch per ______ Btu/h of the total input of all equipment in the enclosure.
• When a single permanent opening, from the outdoors, is provided for combustion air for other than natural draft equipment, it shall commence within ______ inches from the top of the enclosure.
• Condensate drain traps shall what?
• ______ shall not be used.
• When flexible duct is used in place of galvanized steel duct to provide combustion air, the duct diameter shall be increased by what amount?
• The minimum clearance from combustible material for a B vent connector serving a gas appliance with a draft hood is_______.
• An example of work exempt from permit requirements is ____.
• Which statement is false concerning clothes dryer exhaust?
• Approved liners for a masonry chimney consist of approved aluminum, stainless steel and ______.
• For natural draft equipment, which distance describes where the outdoor combustion air opening must commence?
• This standard shall provide the minimum fire safety requirements related to the design, _______, _______, inspection, and maintenance of all public and private cooking operations.
• An example of appliances exempt from combustion air requirements include which of the following?
• Powered makeup air shall be provided if the size of a single opening or multiple openings exceeds _____ inch diameter or equivalent.
• A galvanized steel vent connector, less than 6 inches in diameter must have a minimum thickness of ______ inch, when serving a low heat appliance.
• A vent connector shall be installed without dips or sags and shall slope upward toward the vent at least ______ inch per foot.
• Floor furnaces may be placed in which of the following locations?
• Fusible links in fire dampers must have a temperature rating of at least which value?
• Under the Mechanical Code, an existing system installed prior to adoption may continue to operate if which option is true?
• The minimum clearance from combustible construction for a single wall metal vent connector serving a furnace listed for use with a Type B vent is ______ inches.
• The minimum total area of outside and return air ducts or openings to a heat pump shall be not less than ______ square inches per 1000 Btu/h output rating.
• On horizontal ducts, at least one _______ opening shall be provided for personnel entry.
• The Minnesota Mechanical and Fuel Gas Code is based on which International Code from 2012?
• Direct-fired makeup air heaters shall be tested in accordance with ANSI Z83.4 and ______.
• Explosion control systems shall be designed and installed in accordance with which code?
• For all air handled by a direct-fired makeup air heater, from where shall it be drawn?
• Type II hood materials shall be constructed of which combination?
• Vented gas fireplaces (decorative appliances) should be tested in accordance with and installed as prescribed by the following except
• All ducts shall lead directly to the _______ of the building, so as not to unduly increase any fire hazard.
• Permits are required for which of the following.
• The minimum termination distance for exhaust ducts discharging explosive or flammable vapors, fumes or dusts is _____ ft. from a property line.
• Metal louvered openings for combustion and dilution air shall be deemed to have a maximum free area of which percent of the opening area?
• Which standard is specified for installing cooking appliances designed for commercial occupancies?
• Which of the following does not describe a function of a smoke damper?
• Which of the following statements concerning unvented decorative appliances are correct?
• Listed direct-vent equipment shall be considered properly vented when installed according to the manufacturer's instructions.
• Masonry chimneys must have a lining system when each appliance has a minimum input less than 400,000 Btu/h.
• Additions, alterations or repairs shall not cause a system to become unsafe, hazardous or___.
• When flexible duct is used instead of galvanized steel duct to provide combustion air, the duct diameter shall be increased by one inch.
• Who may issue a stop work order when dangerous conditions are observed?
• For rooftop grease drainage, which combination describes the required characteristics of the collection container?
• Powered makeup air shall be provided if the opening size exceeds which threshold in inches?
• Which statement about unvented room heaters and unvented decorative appliances is correct?
• Used equipment and devices shall not be reused unless approved by whom?
• What is the minimum working space clearance (in inches) required along the sides, back and top for central furnaces installed within compartments or alcoves?