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
n n n n n n n n n n




ndraft systems shall not be less than
n feet above the level of the
n n n n n n n n n n n




nwalkway.ANS: 7 n




Section 804.3.4 n




2. Anylocationconsideredtobeafirehazardforflammablevapors,dust,com-
n n n n n n n n n n n n




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




Location Section 202
n n n




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




hoodsthroughwhichairisconductedfromthespaceorspacesandexhaust- ed to
n n n n n n n n n n n n n n n




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




Section 202 n




4. Duct System n




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




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




equipment and appliances.
n n n




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




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




6. Fire Damper n





n n

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




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




7. Condensate

Section202 Definitions ANS:The liquid that condensesfrom a gas(including flue gas)
n n n n n n n n n n n n n




caused by a reduction in temperature.
n n n n n n




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




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




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




frigerant'ssafetyclassification. ANS:6.6whereinstalledinaccordancewiththe
n n n n n n n n n n n




listing and the manufacturer's instructions. Section 1104.2
n n n n n n n




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




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




intobuildings. ANS:20The discharge of air shallbe to the outdoorsin accordance with
n n n n n n n n n n n n n n n n




Chapter 5. Section 1105.6.1
n n n n




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




ANS:Pipe Ducts.The piping shall be isolated and supported to prevent n n n n n n n n n n n




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




12. Refrigerant piping systems containing poundsormore of a refrig- n n n n n n n n n




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




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





n n

,those required bySection 1107.8
n n n n




Section 1107.8.1
n n




13. Acertificateoftestshallbe providedforallrefrigeration systemscontain- ing
n n n n n n n n n n n n n




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




Section 1108.4 n




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




blowoff Section 1008.1
n n n




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




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




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




Section 1103.2 n




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




tant caps or other protection whenever
n n n is . n ANS: n n n n n




Refrigerantis added.
n n n




Section 1102.3 or recovered n n n




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




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




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




or appliance manufacturer to improve oil return at low temperatures. Section 1102.2.1
n n n n n n n n n n n n




Mixing
n




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




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




Or shall be otherwise secured to prevent unauthorized access.
n n n n n n n n




Section 1101.10
n n




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




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




Section 1009.3 n




n n

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




of the hot-water-heatingsystem. ANS:
n n n n




Capacity Review Equation 10-1
n n n n




Section 1009.2 n




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




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




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




Section 1006.8 n




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




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




As required by the manufacturer's installation instructions for the pressure vessel. Sectio
n n n n n n n n n n n




1006.3
n





n n