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ICC commercial Mechanical Practice Exam 1With
verified answers
1.A mechanical exhaust system designed and constructed to capture air contaminants at their source and to exhaust such contaminants to the outdoor atmosphere. A. SOURCE CAPTURE SYSTEM B. CLEANER VENT C. CLEANER TOWER D. STACK TRAP: A. SOURCE CAPTURE SYSTEM 2.Clearances around appliances to elements of permanent construction, in- cluding other installed equipment and appliances, must be sufficient to allow without removing such elements of permanent construction or disabling the function of a required fire- resistance-rated assembly. A. inspection B. service C. repair or replacement D. inspection, service, repair or replacement E. all of the above: E. all of the above 3.In dust, stock and refuse conveying systems a safety or explosion relief vent must be provided on all systems that convey refuse or stock of an explosive nature, in accordance with the requirements of the International Building Code. A. gaseous B. fine dust C. liquid D. combustible: D. combustible 4.Hazardous exhaust duct systems that penetrate fire- resistance-rated wall assemblies must be enclosed in fire-resistance-rated construction from the point of penetration to the outlet terminal, except where the interior of the duct is equipped with an approved automatic fire suppression system. A. TRUE B. FALSE: A. TRUE 5.In residential garages where appliances are installed in a separate, enclosed space having access only from outside of the garage, the appliances are per- mitted to be installed at floor level, provided that the required is taken from the exterior of the garage. A. makeup air
2 / 15 B. dilution air C. return air D. combustion air: D. combustion air
4 / 15 B. 10 feet
5 / 15 C. 20 feet D. 30 feet: C. 20 feet 12.Air exhaust and intake openings that terminate outdoors must be protect- ed with corrosion- resistant screens, louvers or grilles. For intake openings in residential occupancies the screen must not be less than nor more than. A. Not less than 1/4 inch and not more than 1/2 inch B. Not less than 1/8 inch and not more than 1/2 inch C. Not less than 1/4 inch and not more than 3/8 inch D. Not less than 1/4 inch and not more than 3/4 inch: A. Not less than 1/ inch and not more than 1/2 inch 13.In stationary storage battery systems spaces, an exhaust system must be designed to provide air movement across all parts of the for gases having a vapor density greater than air and across all parts of the vault for gases having a vapor density less than air. A. floor, ceiling B. ceiling, floor C. exterior, interior D. interior, exterior: A. floor, ceiling 14.Dryer exhaust ducts for clothes dryers must terminate on the outside of the building and must be equipped with a. A. screen with not less than 1/4 inch mesh B. backdraft damper and screen C. backdraft damper D. none of these: C. backdraft damper 15.A courtroom has a maximum occupancy density of 70 people per 1000 sq. ft. The courtroom is 2000 sq. ft. If the room was filled to capacity what would be the required outdoor airflow rate for the courtroom? A. 100 cfm B. 600 cfm C. 500 cfm D. 700 cfm: D. 700 cfm 16.Vents must terminate not less than in vertical height above the highest connected appliance flue collar. Exceptions ignored. A. 2 feet B. 5 feet C. 10 feet
7 / 15 17.Whenever there is insufficient evidence of compliance with the provisions of the code, or evidence that a material or method does not conform to the requirements of the code, or in order to substantiate claims for alternative ma- terials or methods, the code official may have the authority to A. remove said equipment B. condemn the property C. require tests as evidence of compliance to be made at no expense to the jurisdiction D. revoke the mechanical permit: C. require tests as evidence of compliance to be made at no expense to the jurisdiction 18.A smoke control system must be designed such that the maximum prob- able normal or reverse stack effects will not adversely interfere with the system's capabilities. In determining the maximum probable stack effects, must be used. A. altitude B. elevation C. weather history D. interior temperatures E. All of the above: E. All of the above 19.All steam and hot water boilers must be protected with a . A. pressure balancing valve B. backflow protector C. brass gate valve D. low-water cutoff control: D. low-water cutoff control 20.Smoke dampers are not required in corridor penetrations where the build- ing is equipped throughout with in accordance the code if smoke dampers are not necessary for the operation and control of the system. A. an approved fire sprinkler control system B. an approved smoke control system C. an approved air control system D. an approved emergency fire control system: B. an approved smoke control system 21.Exhaust ducts for domestic clothes dryers must be constructed of metal and must have a smooth interior finish and the exhaust duct is to be
8 / 15 a minimum nominal size of. A. 3 inches in diameter
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C. 250* F
D. 350* F: C. 250* F
27.2x12 nominal ceiling joists 12 feet long need to be bored to accommodate an air duct. If the holes are dead centered in the joists, what is the maximum allowable diameter of the bored holes in inches? A. 3.75 inches B. 4.75 inches C. 5.75 inches D. 6.75 inches: A. 3.75 inches 28.Ducts and air transfer openings are required to be protected with a min- imum Class II, smoke damper complying with the Interna- tional Building Code. A. 180* F B. 220* F C. 250* F D. 375* F: C. 250* F 29.creens may not be installed at the duct termination for a clothes dryer vent. A. TRUE B. FALSE: A. TRUE 30.Used refrigerants must not be reused in unless tested and found to meet the purity requirements as outlined in the code. A. a different owner's equipment or appliances B. the same equipment location C. a different equipment location D. none of these: A. a different owner's equipment or appliances 31.What is the minimum required outdoor ventilation air in CFM per person, for an auditorium with and an estimated maximum occupant load, persons per 1,000 square feet of 150? A. 5 B. 10 C. 15 D. 20: A. 5 32.What is the minimum sized pipe for drain pan lines used to carry conden- sate discharge from cooling coils and evaporators? A. 1/4-inch internal diameter B. 1/2-inch internal diameter C. 3/4-inch internal diameter D. 1-inch internal diameter: C. 3/4-inch internal diameter
11 / 15 33.Exhaust air may not be directed. A. into an attic B. crawl space C. onto walkways D. any of these E. none of these: D. any of these 34.Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer's installation instructions, the must apply. Exceptions ignored. A. conditions of the listing and the manufacturer's installation instructions B. code: A. conditions of the listing and the manufacturer's installation instructions 35.Where a combination potable water-heating and space- heating system requires water for space heating at temperatures higher than , an approved temperature actuated mixing valve must be provided to temper the water supplied to the potable hot water distribution system. A. 140F B. 180F C. 200F D. 212F: A. 140*F 36.On dust, stock and refuse conveying systems the outlet of an open-air exhaust terminal must be protected with an approved metal or other noncom- bustible screen to prevent the entry of. A. sparks B. flammable gases C. birds D. outside air: A. sparks 37.A shutoff valve must be installed at the connection to each appliance where. A. more than one fuel-oil-burning appliance is installed B. more than two fuel-oil-burning appliance is installed C. there is a supply fuel line manifold installed D. there is a no supply fuel line manifold installed: A. more than one fuel- oil-burn- ing appliance is installed
- is required for each cooling or evaporator coil or fuel-fired appliance that produces condensate, where damage to any building components will occur as a result of overflow from the equipment drain pan or stoppage in the condensate drain piping. A. An inline dryer unit
13 / 15 C. A secondary drain or auxiliary drain pan D. A universal dryer unit E. none of these: C. A secondary drain or auxiliary drain pan 39.The clearance reduction methods specified in Table 308.4.2 may not be utilized to reduce the clearance required for solid fuel- burning appliances that are labeled for installation with clearances of. A. 12 inches or more B. 12 inches or less C. 6 inches or less D. 6 inches or more: B. 12 inches or less 40.R-22 Refrigerant has what refrigerant classification. A. A B. A C. A D. B1: A. A 41.R-290 Refrigerant has what refrigerant classification. A. A B. A C. A D. B3: C. A 42.Regarding fuel gas appliances, each appliance must be provided with a shutoff valve separate from the appliance. The shutoff valve must be located in the same room as the appliance, not further than from the appliance, and must be installed upstream from the union, connector or quick disconnect device it serves. Exceptions ignored A. 3 feet B. 6 feet C. 10 feet D. 12 feet: B. 6 feet 43.The maximum straight length of a clothes dryer exhaust duct must not exceed from the dryer location to the outlet terminal, assuming there are no angle fittings in the run. A. 10 feet B. 15 feet C. 25 feet D. 35 feet: D. 35 feet 44.Ducts in a private garage that penetrate a wall or ceiling that separates a dwelling from a private garage must be continuous, must be constructed of sheet steel and must not have openings into the garage.
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A. TRUE
B. FALSE: A. TRUE
45.What is the minimum distance in feet between the lowest edge of a grease filter and a burner without an exposed flame is? A. 0.5 feet B. 2 feet C. 3.5 feet D. 4.5 feet: A. 0.5 feet 46.Where an assembly is required to have both fire dampers and smoke dampers, combination fire/smoke dampers . A. must be installed B. will not be allowed C. may be installed or individual fire damper and smoke dampers can be installed D. none of these: C. may be installed or individual fire damper and smoke dampers can be nstalled 47.Underground fuel gas piping, where installed below grade through the outer foundation or basement wall of a building may not penetrate building foundation walls. A. at any point. B. at any point below grade C. unless place in a protective pipe sleeve D. none of thes: B. at any point below grade 48.The minimum chimney connector thickness for a low-heat appliance with a 18" diameter connector is: A. 0.064 (No. 16 gage) B. 0.075 (No. 14 Gage) C. 0.105 (No. 12 Gage) D. 0.135 (No. 10 Gage): A. 0.064 (No. 16 gage) 49.The space surrounding a flue lining system or other vent installed within a masonry chimney may not be used to vent any other appliance. A.This shall not prevent the installation of a separate flue lining in accordance with the manufacturer's installation instructions and the code. B. This shall prevent the installation of a separate flue lining in accordance with the manufacturer's installation instructions and the code. C. Only one flue lining per chimney space
