HVAC Code Practice Test Practice Exam

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