NC MECHANICAL 1 LEVEL 1 TEST.
EXAM QUESTIONS AND ANSWERS
GRADED A+ 2026
Design professional engineer Which of the following can inspect welds on steel I beams in a
commercial structure: A. Building inspector B. Contractor C. Designed professional engineer D.
Jose the weld - ✔✔C
Outdoor heated pool covers Outdoor heated pool covers shall be provided with a ________? -
✔✔Class 1 vapor retardant cover
Total duct leakage In a residence, Total duct leakage shall be less than or equal to __ cfm per
100 sq/ft of conditioned floor area served by that system - ✔✔5
Heat pump controls In a residence, Heat pumps having supplementary electric-resistance heat
shall have controls that, except during defrost, prevent heat operation when _____? - ✔✔the
heat pump compressor can meet the heating load
Heat pump lockout settings In a residence, Heat pump lockout shall be set no lower than ____
and no higher than ____. - ✔✔35*F, 40*F
Return ducts insulation Are return ducts inside semi-conditioned and conditioned spaces of a
residence required to be insulated? - ✔✔Not required, other than may be necessary
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, Thermostat control in commercial occupancy In a commercial occupancy, a thermostat is
allowed to control multiple zones from one thermostat - ✔✔False, each zone must be
controlled by individual controls within that zone.
Climate zone of Alamance county Alamance county is in climate zone _____ - ✔✔4A
Minimum screen mesh size The minimum screen mesh size for a vent terminating to the
outdoors in a residence is? - ✔✔Not less than 1/4"
Hazardous exhaust system requirement A hazardous exhaust system is required when ______,
except in laboratories - ✔✔see M510.2
Exhaust system requirement An exhaust system is required when ____? - ✔✔Equipment and
processes in such areas produce or throw off dust or particles sufficiently to float in the air, or
which emit heat, odors, fumes, spray, gas or smoke in such quantities so as to be irritating or
injurious to health and safety
Maximum screen opening size The maximum opening size of a screen on an air intake can be no
larger than ___ Inch. - ✔✔1/2
Condensate waste line size Condensate waste and drain line sizes shall be no smaller than ____.
- ✔✔3/4"
Condensate drain slope The slope of a condensate drain shall be no less than _____ inch per 12
inches - ✔✔1/8"
Portable space heater usage Can a portable space heater be used to provide space heating in an
interior space intended for human occupancy? - ✔✔No. Heating systems need to be
permanently affixed.
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
EXAM QUESTIONS AND ANSWERS
GRADED A+ 2026
Design professional engineer Which of the following can inspect welds on steel I beams in a
commercial structure: A. Building inspector B. Contractor C. Designed professional engineer D.
Jose the weld - ✔✔C
Outdoor heated pool covers Outdoor heated pool covers shall be provided with a ________? -
✔✔Class 1 vapor retardant cover
Total duct leakage In a residence, Total duct leakage shall be less than or equal to __ cfm per
100 sq/ft of conditioned floor area served by that system - ✔✔5
Heat pump controls In a residence, Heat pumps having supplementary electric-resistance heat
shall have controls that, except during defrost, prevent heat operation when _____? - ✔✔the
heat pump compressor can meet the heating load
Heat pump lockout settings In a residence, Heat pump lockout shall be set no lower than ____
and no higher than ____. - ✔✔35*F, 40*F
Return ducts insulation Are return ducts inside semi-conditioned and conditioned spaces of a
residence required to be insulated? - ✔✔Not required, other than may be necessary
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, Thermostat control in commercial occupancy In a commercial occupancy, a thermostat is
allowed to control multiple zones from one thermostat - ✔✔False, each zone must be
controlled by individual controls within that zone.
Climate zone of Alamance county Alamance county is in climate zone _____ - ✔✔4A
Minimum screen mesh size The minimum screen mesh size for a vent terminating to the
outdoors in a residence is? - ✔✔Not less than 1/4"
Hazardous exhaust system requirement A hazardous exhaust system is required when ______,
except in laboratories - ✔✔see M510.2
Exhaust system requirement An exhaust system is required when ____? - ✔✔Equipment and
processes in such areas produce or throw off dust or particles sufficiently to float in the air, or
which emit heat, odors, fumes, spray, gas or smoke in such quantities so as to be irritating or
injurious to health and safety
Maximum screen opening size The maximum opening size of a screen on an air intake can be no
larger than ___ Inch. - ✔✔1/2
Condensate waste line size Condensate waste and drain line sizes shall be no smaller than ____.
- ✔✔3/4"
Condensate drain slope The slope of a condensate drain shall be no less than _____ inch per 12
inches - ✔✔1/8"
Portable space heater usage Can a portable space heater be used to provide space heating in an
interior space intended for human occupancy? - ✔✔No. Heating systems need to be
permanently affixed.
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
