International Mechanical Code Exam -Study Questions for the 2024/2025 IMC Test for ICC certification Test | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+

International Mechanical Code Exam -Study Questions
for the 2024/2025 IMC Test for ICC certification Test |
Actual Questions and Answers Latest Updated
2024/2025 (Graded A+




1. Wherelocatedadjacenttowalkways,thehorizontalterminationofmechan- ical
ji ji ji ji ji ji ji ji ji ji




draft systems shall not be less than
ji ji feet above the level of the ji ji ji ji ji ji ji ji ji ji ji




walkway.ANS: 7
ji ji




Section 804.3.4 ji




2. Anylocationconsideredtobeafirehazardforflammablevapors,dust,com-
ji ji ji ji ji ji ji ji ji ji ji ji




bustible fibers or other highly combustible substances. ANS: Hazardous
ji ji ji ji ji ji ji ji ji




Location Section 202
ji ji ji




3. An assembly of connected ducts, plenums, fittings, registers, grilles, and
ji ji ji ji ji ji ji ji ji




hoodsthroughwhichairisconductedfromthespaceorspacesandexhaust- ed to
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji




the outside atmosphere. ANS: Exhaust System
ji ji ji ji ji ji




Section 202 ji




4. Duct System ji




Section 202 ANS: A continuous passageway for the transmission of air that in addition
ji ji ji ji ji ji ji ji ji ji ji ji ji




toducts,includesductfittings,dampers,plenums,fans,andaccessoryair-handling
ji ji ji ji ji ji ji ji ji ji ji




equipment and appliances.
ji ji ji




5. Damper
Section 202 ANS:A manually or automatically controlled device to regulate draft or the
ji ji ji ji ji ji ji ji ji ji ji ji ji




rate of flow of air or combustion gases.
ji ji ji ji ji ji ji ji




6. Fire Damper ji




1/43 ji ji

,Section 202 ANS:A listed device installed in ducts and air transfer openings designed
ji ji ji ji ji ji ji ji ji ji ji ji ji




to close automatically upon detection of heat and to restrict the passage of flame.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji




7. Condensate

Section202Definitions ANS:Theliquidthatcondensesfromagas(includingfluegas)
ji ji ji ji ji ji ji ji ji ji ji ji ji




caused by a reduction in temperature.
ji ji ji ji ji ji




8. Commercial kitchen hoods by definition ANS:6: ji ji ji ji ji ji




9. Machinery rooms are not required for listed equipment and appliances ji ji ji ji ji ji ji ji ji




containing not more than
ji pounds or refrigerant, regardless of the re-
ji ji ji ji ji ji ji ji ji ji




frigerant'ssafetyclassification. ANS:6.6whereinstalledinaccordancewiththelisting
ji ji ji ji ji ji ji ji ji ji ji ji




and the manufacturer's instructions. Section 1104.2
ji ji ji ji ji ji




10. Exhaust from mechanical ventilation systems serving machinery rooms ji ji ji ji ji ji ji




shall be discharged not less than
ji ji feet from a property line or openings
ji ji ji ji ji ji ji ji ji ji ji




intobuildings. ANS:20Thedischargeofairshallbetotheoutdoorsinaccordancewith
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji




Chapter 5. Section 1105.6.1
ji ji ji ji




11. Refrigerant piping installed in concrete floors shall be encased in ji ji ji ji ji ji ji ji ji ji




ANS:PipeDucts.Thepipingshallbeisolatedandsupportedtoprevent ji ji ji ji ji ji ji ji ji ji ji




damaging vibration , stress, and corrosion. Section 1107.2.1
ji ji ji ji ji ji ji ji




12. Refrigerant piping systems containing poundsormoreofarefrig- ji ji ji ji ji ji ji ji ji




erant, other than systems utilizing nonpositive displacement compressors,
ji ji ji ji ji ji ji ji




shall have stop valves on each inlet of each liquid receiver. ANS:100 in additon to
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji




2/43 ji ji

,thoserequiredbySection1107.8 ji ji ji ji




Section 1107.8.1
ji ji




13. Acertificateoftestshallbeprovidedforallrefrigerationsystemscontain- ing
ji ji ji ji ji ji ji ji ji ji ji ji ji




pounds or more of refrigerant. ANS: 55 ji ji ji ji ji ji




Section 1108.4 ji




14. Steam boilers shall be equipped with bottom ji ji ji ji ji ji valves. ANS: ji




blowoff Section 1008.1
ji ji ji




15. Locations of refrigerating systems are described by classifications ji ji ji ji ji ji




that consider the ability of people to respond to potential exposure to refrig-
ji ji ji ji ji ji ji ji ji ji ji ji ji




erants. ANS: Occupancy.There are seven types.
ji ji ji ji ji ji ji




Section 1103.2 ji




16. Existing refrigerant access ports located outdoors require tamper-resis- ji ji ji ji ji ji ji




tant caps or other protection whenever
ji ji isji . ANS: ji ji ji ji ji ji




Refrigerantis added.
ji ji ji




Section 1102.3 or recovered ji ji ji




17. Refrigerants, including refrigerant blends, with different designations in ji ji ji ji ji ji ji




ASHRAE 34 shall
ji be mixed in a system. ANS: Not
ji ji ji ji ji ji ji ji ji




Exception: Addition of a second refrigerant is allowed where permitted by the equipmen
ji ji ji ji ji ji ji ji ji ji ji ji




orappliancemanufacturerto improveoilreturnatlow temperatures. Section 1102.2.1
ji ji ji ji ji ji ji ji ji ji ji ji




Mixing
ji




18. Refrigerant circuit access ports located ji ji ji ji ji shall be fitted with lock- ji ji ji ji




ing-type tamper resistant caps. ANS: Outdoors
ji ji ji ji ji ji




Orshallbeotherwisesecuredtopreventunauthorizedaccess.
ji ji ji ji ji ji ji ji




Section 1101.10
ji ji




19. Open-type expansion tanks shall be located not less than ji ji ji ji ji ji ji ji ji feetabove ji




the highest heating element. ANS: 4
ji ji ji ji ji ji




Section 1009.3 ji




3/43
ji ji

, 20. The minimum size of a closed-type expansion tank shall be based on the
ji ji ji ji ji ji ji ji ji ji ji ji




ofthehot-water-heatingsystem. ANS:
ji ji ji ji




Capacity Review Equation 10-1
ji ji ji ji




Section 1009.2 ji




21. The power supply to the electrical control system for the boiler shall be
ji ji ji ji ji ji ji ji ji ji ji ji




from a two-wire branch circuit that has a
ji ji ji conductor,orfroman
ji ji ji ji ji ji ji ji ji




isolation tranformer with a two-wire secondary. ANS: Grounded
ji ji ji ji ji ji ji ji




Section 1006.8 ji




22. All pressure vessels shall be protected with a
ji ji ji ji ji ji ji ji relief valve or ji ji




-limiting device. ANS:Pressure & Pressure
ji ji ji ji ji




Asrequiredbythemanufacturer'sinstallationinstructionsfor thepressurevessel. Sectio
ji ji ji ji ji ji ji ji ji ji ji




1006.3
ji




4/43 ji ji