ICC CMI Quiz 3

1) The use of Gypsum boards to form plenums shall be limited to systems where the air temperatures do not exceed? (602.2)

125 degrees F 150 degrees F 200 degrees F 250 degrees F

2) Gypsum board surfaces used for plenums shall be maintained at temperatures? (602.2)

Above freezing Below 250 degrees F Above the airstream dew-point Above 60 percent relative humidity

3) Supply air plenums formed by gypsum boards for use in direct evaporative cooling shall (602.2)

Only be used if the temperature is maintained above 125 degrees F Shall never be used Shall be permitted to be used if the temperature is above the dew point Must be kept outside of exterior walls

4) A business occupancy can use a plenum made from wood floor joists only when? (602.2.1)

When in exterior walls When used between floors Only allowed if the dew point temperature is always exceeded Never allowed

5) Plenums between wood floor joists are allowed in what kind of occupancy? (602.2.1 Exception 3)

Business Assembly Education One and two family dwellings

6) Combustible electrical wires and cables and optical fiber cables exposed within a plenum shall be? (602.2.1.1)

Listed and labeled for plenums use Have a flame spread index of 25 or less Have a smoke index under 50 Be listed as a Class B interior surface

7) Wiring in plenum space shall have a flame spread? (602.2.1.1)

Index under 25 Index under 50 Index under 100 Distance not greater than 5 feet

8) Plastic fire sprinkler piping exposed within a plenum shall have a flame spread? (602.2.1.2)

Index under 25 Index under 50 Index under 100 Distance not greater than 5 feet

9) Stud wall cavities used as supply air plenums shall? (602.3(1))

Never be used Only used in residential structures Allowed but not in exterior walls Permitted only in ceilings

10) Stud wall cavities in the outside walls of the building envelope shall be allowed for air plenums when? (602.3(6))

Never be used Only in residential structures Only when temperatures are above the dew point Only if outdoor temperatures never exceed 125 degrees F

11) Flexible air ducts shall be tested in accordance with?

UL 181 NFPA 286 ASTM E 84

12) Flexible air ducts shall be limited to what length? (603.6.1.1)

100 feet 50 feet 25 feet Unlimited

13) Flexible air connectors shall be limited to what length? (603.6.2.1)

14 feet 20 feet 25 feet 35 feet

14) The design temperature of air to be conveyed in flexible air ducts and connectors shall be less than? (603.6.3)

125 degrees F 200 degrees F 225 degrees F 250 degrees F

15) Underground metal ducts not having a protective coating shall be encased in not less than how much concrete? (603.8)

1 inch 2 inches 3 inches 4 inches

16) A 10 inch round steel duct in a single dwelling unit shall have a thickness not less than?

0.01 inch 0.013 inch 0.018 inch 0.02 inch

17) A 10 inch round aluminum duct in a single dwelling unit shall have a thickness not less than?

0.01 inch 0.013 inch 0.018 inch 0.019 inch

18) A 20 inch round steel duct in a single dwelling unit shall have a thickness not less than?

0.01 inch 0.013 inch 0.018 inch 0.019 inch

19) A 20 inch rectangular aluminum duct in a single dwelling unit shall have a thickness not less than?

0.018 inch 0.02 inch 0.025 inch 0.034 inch

20) Seams in ducts shall be securely fastened and sealed with welds, gaskets, mastics, tapes, etc, and shall be supported. Flexible and other factory made ducts shall be supported? (603.10, 603.9)

Every three feet Every two feet Every ten feet In accordance with the manufacturer’s instructions

21) Ducts shall not be installed within how far from earth? (603.14)

2 inches 4 inches 6 inches 8 inches

22) Ducts installed in locations where they are exposed to mechanical damage by vehicles or from other causes shall be protected by? (603.15)

Approved barriers Bollards within three feet Rigid steel cages Barricades that extend 80 inches above the ground

23) Ducts that operate at temperatures above 120 degrees F shall have suAicient thermal insulation to limit the exposed surface temperature to? (604.2)

120 degrees F 250 degrees F 200 degrees F 180 degrees F

24) Duct coverings and linings including adhesives shall have a flame spread index not more than? (604.3)

50 25 Class C 100

25) Duct coverings and linings including adhesives shall have a smoke-developed index not more than? (604.3)

25 50 75 100

26) Duct coverings and linings shall not flame, glow, smolder or smoke when tested in accordance with? (604.3)

NFPA 286 ASTM E 84 ASTM C411 UL 755

27) Ducts that penetrate fire resistance rated assemblies shall have their duct covering? (604.6)

Penetrate through the assembly Not penetrate through the assembly Be removed within 6 inches on either side of the assembly Meet a Class A interior finish

28) External duct insulation shall be identified at intervals not greater than 36 inches with all of the following except? (604.7)

Manufacturer Thermal resistance R-value Flame Spread and smoke-developed indices Serial number

29) A duct system with electric resistance or fuel burning heaters within the ducts shall have the linings on the ductwork removed not less than how far up and downstream of the heaters? (604.8)

2 inches 6 inches 12 inches 18 inches

30) Duct coverings shall not conceal service openings unless? (604.10)

The insulation is less than 0.5 inch The opening location is properly identified The duct is designed to be removed The duct is factory made

31) Where ducts used for cooling are externally insulated, the insulation shall be covered with a vapor retarder. Insulation having a permeance of 0.05 perm or less shall? (604.11)

Require a covering at least 0.01 inch Shall not be required to be covered Shall only be permitted within conditioned space Shall use a plastic covering

32) Heating and air-conditioning systems shall be provided with air filters except for? (605.1)

Business occupancies Portable air cooling units Heat pump air exchangers Type 1 hoods

33) Liquid adhesive coatings used on filters shall have a flash point not lower than? (605.1)

125 degrees F 250 degrees F 325 degrees F 400 degrees F

34) Smoke detectors shall be installed in return air systems with a design capacity greater than? (606.2.1)

1,000 CFM 2,000 CFM 15,000 CFM All units

35) Upon activation of smoke detectors within ducting, the system shall cause the? (606.4)

Fire dampers to close Smoke dampers to close Shut down all operational capabilities of the air distribution system Slow down the air system by 90 percent

36) Fire dampers shall comply with the requirements of? (607.3.1)

UL 181 ASTM E119 UL 555 NFPA 286

37) Smoke dampers shall comply with the requirements of? (607.3.1)

UL 181 ASTM E119 UL 555 UL 555S

38) Ceiling radiation dampers shall comply with the requirements of? (607.3.1)

UL 181 ASTM E119 UL 555C UL 555S

39) Fire dampers within 3-hour rated construction shall be rated for? (Table 607.3.2.1)

1.5 hours 2 hours 3 hours 3.5 hours

40) Where a smoke damper is installed within a duct, a smoke detector shall be installed inside the duct or outside the duct with sampling tubes protruding into the duct. The detector or tubes within the duct shall be within how far from the damper? (607.3.3.2(1))

2 feet 4 feet 5 feet 6 feet

41) Fire and smoke dampers shall be provided with an approved means of access that is? (607.4.1)

At least 12 inches wide Is clearly labeled and has a minimum dimension of six inches Large enough to permit inspection and maintenance At least 18 inches in width

42) The access openings on ducts to service fire and smoke dampers shall have access doors that shall not reduce the fire resistance rating of the assembly and shall be? (607.4.1.1)

At least 18 inches in sidth Shall be tight fitting Shall not have insulation on the door Shall not be permitted to be hotter than 110 degrees F

43) Access points on ducts to service fire and smoke dampers shall be permanently identified on the exterior by a lable having letters not less than what height? (607.4.2)

1/2 inch 1 inch 3/4 inch 3/8 inch

44) Listed fire dampers are required for ducts that penetrate fire partitions unless the duct shall not exceed what area? (607.5.3 Exception 3.1)

100 square inches 10 square inches 200 square inches 50 square inches

45) Smoke dampers are not required in corridor penetrations where the duct is constructed of steel not less than what thickness? (607.5.4 Exception 3)

0.013 inch 0.019 inch 0.034 inch 0.024 inch

46) Penetrations through fire rated shafts are permitted not to have fire dampers in parking garages provided such garages are separated from other building shafts by not less than what? (607.5.5 Exception 1.4)

1-hour fire resistance rated construction 2-hour fire resistance rated construction 3-hour fire resistance rated construction 4-hour fire resistance rated construction

47) Ceiling radiation dampers installed in heating systems designed to operate with fans on during a fire shall be labeled for use in? (607.6.2.1.1)

Constant velocity systems Air duct systems Plenum spaces Dynamic systems

48) In floor assemblies composed of noncombustible materials, a shaft shall not be required where the duct connects not more than how many stories and the annular space around the penetrating duct is protected with an approved noncombustible material that resists the free passage of flame and a fire damper is installed at each floor line? (607.6.3(3))

2 stories 3 stories 4 stories 5 stories

49) Air distribution, ventilation and exhaust systems shall be provided with means to adjust the system to achieve the design airflow rates and shall be? (608.1)

Balanced by an approved method Monitored at central location Be protected by 3-hour rated construction Have adequate flow meters to ensure velocity in ducts is always under 200 ft/s

50) Where combustion air openings are provided with volume, smoke or fire dampers, the dampers shall be? (701.2)

Interlocked with the firing cycle of the appliances served Kept under 100 ft/s Prevented from being opened Kept clear from maintenance access

2021 ICC Commercial Mechanical Inspector Quiz 3

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