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Commercial Exam | Sample License Q&A
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what is the minimum width of the required continuous solid flooring along the required access path to an attic appliance?
- 22 inches 2.24 inches 3.16 inches
4. none required - Answer>>> ✔️ Answer 2/ 2018 NC mechanical code
section 306.3 pages 22 and section 306.3 2018 NCFGC page 21 when smoke detectors are required by the code, they shall be installed based on which of the following?
- the 2018 NC mechanical code
- NFPA 70
- the 2018 NC fire code
4. NFPA 72 - Answer>>> ✔️ Answer 4/ 2018 NC mechanical code section
{F}606.3 page 74 what is the latent load for 200 people working in a factory as a machine tool operator?
Commercial Exam | Sample License Q&A
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- 125,000 btu/hr
- 35,000 btu/hr
- 12,300 btu/hr
4. 96,500 btu/hr - Answer>>> ✔️ Answer 1
ACCA manual-N version 5 table 6B 625 btu/hr per person x 200 people = 125,000 btu/hr a building used for light industrial assembly is in ashville , north carolina and has a roof deck that sits on structural steel with a suspended ceilling below. the roof deck consists of 1.5" thick wood with R-3 insulation board and a suspended ceiliing below with R-19 insulation located on the ceiling tile. what is the heat loss for this assembly on a design winter day if the roof measures 250 feet long by 40 feet wide and the indoor temperature is to be maintained at 70'F?
- 26,450 btu/hr
- 19,980 btu/hr
- 29,220 btu/hr
4. 10,900 btu/hr - Answer>>> ✔️ Answer 2
ACCA Manual-N version 5 table 6B table 4 construction # 17B-3w-x provides a u-value for the assembly of 0.
Commercial Exam | Sample License Q&A
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1. EHD 18
2. EHD 19
3. EHD 23
4. EHD 25 - Answer>>> ✔️ Answer 3
2018 NC fuel gas code table 402.4(15) page 45 when running a residential load estimate for climate zone 3 in north carolina, what is the minimum solar heat gain coefficient you can use for the glass?
1.. 2.. 3..
4. .40 - Answer>>> ✔️ Answer 2
2018 NC energy code table R402.1.2 page R- 16 when running PVC pipe underground for use as part of a domestic kitchen exhaust system , no more than _______ inches of PVC duct is allowed to extend above the concrete floor surface.
- 1 inch
Commercial Exam | Sample License Q&A
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- 4 inches
- 6 inches
4. no limit - Answer>>> ✔️ Answer 1
2018 NC mechanical code section 505.1 exception 2.3 page 49 a rectangular duct measures 40" x 34" on the outside and has 2" of duct insulation lining the duct. what is the equivalent round duct size?
- 36" round
- 35.9" round
- 38" round
4. 40" round - Answer>>> ✔️ Answer 2
convert duct to clear inside dimensions 40" - 4" of liner = 36" 34"-4" of liner=30" per ACCA manual - Q A3-1 on page A3-2 the equivalent round duct size is 35.9" sediment traps are required in gas piping systems and must be located _______?
- where the gas piping enters the building
- near the equipment in a convenient location
Commercial Exam | Sample License Q&A
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- 7000 cubic feet of air
- 5250 cubic feet of air
- 8000 cubic feet of air
4. 4950 cubic feet of air - Answer>>> ✔️ Answer 2
2018 NC fuel gas code section 304.1 page 17 the standard method 304.5.1 requires 50 cubic feet of the indoor air per 1000 btu/hr of total connected load of appliances in the space. 60k btu/hr for the furnace and 45k btu/hr for the water heater equals 105k btu/hr of total connected load. 105 btu/hr total x 50 cubic feet per 1000 btu/hr (required by 304.5.1)= cubic feet required for combustion air for the space to be considered unconfined. in a residential duct system , a 1R fitting has how many more feet of equivalent length than a 1Q fitting?
- 30 feet
- 50 feet
- 70 feet
4. 90 feet - Answer>>> ✔️ Answer 3
Commercial Exam | Sample License Q&A
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ACCA manual - D group 1 fittings shows a 1E fitting with 120 equivalent feet and a 1Q fitting with 50 equivalent feet. The difference is 70 feet of equivalent feet version 1.0 through 2.4 page # 150 version 2.5 is page N a block wall in a residential building has a stucco outside finish , mental studs with R-11 insulations, hollow cells , medium color and an interior finish , If 500 square feet of this wall face west in raleigh, north carolina , what is the heat gain from this wall in the summer at design load conditions?
- 1350 btu/hr
- 1000 btu/hr
- 834 btu/hr
4. 692 btu/hr - Answer>>> ✔️ Answer 4
ACCA manual-J table 4 construction number 13BB-0cc w/m shows a u-value for the assembly of .109 group H Table 1 shows raleigh summer design is 90'F with a medium daily range and the indoor temperture default for table 4 is 75'F therefore the delta-T is 15'F table 4B shows the CLTD value for this application as 12. .109 x 12.7 x 500 = 692.
Commercial Exam | Sample License Q&A
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1. 0.75 IWC
2. .056 IWC
3. .039 IWC
4. 0.24 IWC - Answer>>> ✔️ Answer 1
ACCA manual - Q page A4-9 figure A4- 8 a wet residential unitary evaporator coil has approximately ____ IWC of pressure drop when 1750 cfm of air is moving through the coil
- 0.18 IWC
- 0.26 IWC
- 0.35 IWC
4. 0.46 IWC - Answer>>> ✔️ Answer 4
ACCA manual - D figure 4-2 page 27 what is the maximum allowable face velocity across a return air grill in north carolina?
- 300 fpm
- 450 fpm
Commercial Exam | Sample License Q&A
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- 500 fpm
4. 550 fpm - Answer>>> ✔️ Answer 2
2018 NC mechanical code section 603.19 page 72 what is the maximum distance between supports for 1/2" semi-rigid copper tubing when used as a gas line.
- 6 feet
- 10 feet
- 5 feet
4. 4 feet - Answer>>> ✔️ answer 4
2018 NC fuel gas code table 415.1 page 81 when installing a duct heater with heat pumps or air conditioners the maximum distance the heater can be from the air handling unit is ________?
- 2 feet
- 4 feet
- 6 feet
4. 8 feet - Answer>>> ✔️ Answer 2
2018 NC mechanical code section 930.3 page 93
Commercial Exam | Sample License Q&A
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a light- commercial building has two, 7.5 ton rooftop units currently installed. the owner has added some internal gain and wants an 18,000 btu/hr ductless unit added for the additional load. what license classification do you need in north carolina to install the 18,000 btu/hr ductless unit.
- H3- class 2
- H3- class 1
- H
4. H1 - Answer>>> ✔️ Answer 3
state board laws and rules part 1 s87-21(3) you are asked to cool a room in a pump house that contains 10, twenty horse power pump motors that are inside the space to be conditioned, what is the total sensible load of the pump motors btu/hr.
- 585,000 btu/hr
- 509,000 btu/hr
- 76,100 btu/hr
4. 176,100 btu/hr - Answer>>> ✔️ Answer 1
ACCA manual - N5 table 6D 58,500 btu/hr each x 10 motors
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a residential HVAC system has a heating load of 34,500 btu/hr and a cooling load of 31,350 btu/hr. if the blower produces 1150 CFM, the cooling factor is _____.
4. 0.020 - Answer>>> ✔️ Answer 1
ACCA manual - D room air airflow equation A1- 4 page 88 version 2. page 126 all previous versions you are running a gas vent from a space through a ventilated attic, and the vent travels through the attic insulation. what is the clearance you are required to maintain with an insulation shield if the vent is connected to a category 1 furnace and the vent is type B double-wall?
- 6" clearance
- no clearnce
- 1" clearance
4. no clearance needed with insulation shield - Answer>>> ✔️ Answer 3
2018 NC fuel gas code section 502.4 page 84 specified in installation instructions
Commercial Exam | Sample License Q&A
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step 3) in table 4 find the construction assembly that matches the decription in the question. construction number 13CB-0fc w/m matches and has a u-vale of . step 4) the equation on the first page of table 4 is u-value x ^T x area of heat transfer surface step 5) .089 (u-value) x 54 (^T) x 500 (area in square feet) = 2403 btu/hr appliances requiring service are located on a flat foot that is 16 feet above grade. there is also a 4' parapet that hides the equipment from view from the street. is a permanent means of access required for servicing the equipment?
- no
- yes 3.only if the equipment is gas - fired
4.not if serviced by owners employees - Answer>>> ✔️ answer 2
2018 NC mechanical code section 306.5 page 22 and 2018 NC fuel gas code section 306.5 page 22 in one and 2 family dwellings and townhouses, HVAC equipment shall be selected using ______ procedures.
- ACCA manual - J
- ACCA manual-D
Commercial Exam | Sample License Q&A
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- ACCA manual-S
4.ACCA manual-HP - Answer>>> ✔️ Answer 3
2018 NC mechanical code section 312.1 page 26 what is the minimum thickness of pipe insulation on a 3" chilled water supply pipe located inside a building. 1.three quarters-inch 2.one-inch 3.one and half - inch
4.two-inch - Answer>>> ✔️ Answer 3
2018 NC energy code table c403.2.10 page C- 39 LP-tank installations regulations are controlled by what goverment agency. 1.NFPA 58
- the office of the state fire marshall 3.the NC department of argriculture
4. NC LP gas association - Answer>>> ✔️ answer 3
2018 NC fuel gas code section 401.2 page 29
Commercial Exam | Sample License Q&A
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4. 0.04 - Answer>>> ✔️ answer 3
ACCA manual-D equation A1-5 in appendix 1 .3 x 100 / 480=. a domestic clothes dryer termination leaves the building and terminates less than 12" from the adjoining grade. it is impossible to relocate the wall cap, what can be done to meet code?
- use a soffit cap
- dig a 200-inch^2 area well under the wall cap
- turn the wall cap sideways
4. ask for a variance - Answer>>> ✔️ answer 2
2018 NC mechanical code section 504.8.7 exception page 48 and 2018 NC fuel gas code section 614.6.2 exception page 125 what is the maximum negative pressure you are allowed run in round steel duct in commerical applications
- 1"WG
- 2"WG
Commercial Exam | Sample License Q&A
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3. 3"WG
4. 4"WG - Answer>>> ✔️ answer 3
ACCA manual - Q page 2-1 and ACCA manual - Q figure A3-8, page A3- 10 in residential duct system with an ECM motor ____ cfm per norminal ton of capacity is appropriate for dwellings that have significant latent loads compared to senseible loads as defined by manual - J with a sensible heat ratio of .80.
- 350 cfm/ton
- 400 cfm/ton
- 500 cfm/ton
4. 550 cfm/ton - Answer>>> ✔️ answer 2
ACCA manual-D section 3-3 "cooling CFM setpoint of ECM motors" flexiable wire heilx duct runs shall be straight, per ADC limits for droop and sag, with no more than ______% compression.
- 4%
- 8%
- 12%
4. 20% - Answer>>> ✔️ answer 1
