South Carolina currently enforces which mechanical and fuel-gas codes for commercial heating work?
Code Compliance
Question · Easy
Per 2021 IMC Section 303.3, a natural-draft gas furnace is prohibited in which location unless a listed exception applies?
In a private garage, equipment with an ignition source must be elevated so the ignition source is not less than how far above the floor, unless the appliance is listed as flammable-vapor-ignition resistant?
Trades Exam Prep Podcast
Listen on Spotify
Podcast
Unless approved under the alternate-materials process, appliances regulated by the 2021 IMC must be which of the following?
Approval and installation of fuel-gas distribution piping, gas-fired appliances, and gas appliance vents in South Carolina are governed by which document?
Unless an exception applies, an attic containing a furnace must have a passageway not less than which dimensions, and not more than 20 feet long measured along the centerline?
Question · Medium
In front of the control side of an appliance, the 2021 IMC requires a level working space of not less than which size?
Unless protected from vehicle impact and installed under the ignition-source rules, an appliance in a public garage or repair garage shall be installed not less than how far above the floor?
Unless protected from vehicle impact and installed under IMC 304.3, appliances in a private garage or carport shall have a minimum clearance above the floor of which amount?
Equipment installed at grade shall be supported in which manner?
A permanent interior or exterior means of access, not portable ladders, is required when personnel must climb higher than which height above grade to reach roof or elevated equipment (Group R-3 excepted)?
When running heating pipe or duct through a wood joist, which cutting and boring limit is correct under IMC 302.3.1?
In an exterior wall or bearing partition, a wood stud shall not be cut or notched more than what portion of its depth?
Guards are required at roof equipment that needs service when that equipment is within 10 feet of a roof edge more than 30 inches above the surface below. What are the minimum guard rules?
Question · Hard
The manufacturer's installation instructions require 6 inches of side clearance to combustibles. The IMC text would allow 3 inches for that appliance type. Which clearance governs?
Combustion air for a gas-fired warm-air furnace in South Carolina is sized and located using which source?
A fuel-burning heating appliance nameplate must include which information?
Harv General
When must the manufacturer's installation instructions be available on a South Carolina heating job?
A heating appliance installed outdoors must meet which requirement?
Furnaces and boilers installed in closets and alcoves shall be which of the following?
Incomplete combustion in a gas- or oil-fired heating appliance is primarily associated with which hazard?
An appliance set in a pit or excavation must meet which installation limits?
A fuel-fired heating appliance shall not be converted to a different fuel except under which condition?
Underfloor (crawl-space) appliance access must provide which minimum opening, unless an exception applies?
On a conventional 24-volt gas furnace, a call for heat closes which thermostat circuit to energize the heating control sequence?
Harv Controls
A furnace high-limit control is intended to do which of the following?
A low-water cutoff on a steam or hot-water boiler must automatically do which of the following?
On a typical combination fan-and-limit control for a gas warm-air furnace, which statement is correct?
A standing-pilot gas furnace proves the pilot before the main burner can open by using which device?
On a two-stage gas furnace thermostat, W2 typically does which of the following?
An aquastat on a hot-water heating boiler primarily does which of the following?
Per IMC 1006.8, the electrical control circuit for a boiler must meet which requirement?
Which ACCA manual is the residential heating and cooling load-calculation procedure listed on the South Carolina Heating Contractor exam references?
Harv Load Calculation
The winter heating load for a space is primarily the rate at which the space loses heat. That load is used to do which of the following?
The conduction heat loss through a wall, roof, or glass is calculated with which relationship?
Sensible heat carried by an air stream is commonly estimated with which formula (standard air)?
Heat delivered by a hot-water heating circuit is commonly estimated with which formula?
One square foot of equivalent direct radiation (EDR) is defined as the surface that emits which output at standard rating conditions?
ACCA Manual N is the appropriate load-calculation method for which project type on this exam?
When performing a Manual J or Manual N heating load, indoor and outdoor design temperatures should come from which practice?
Infiltration heating load is the sensible (and, in cooling, latent) load caused by which of the following?
A heating contractor is replacing a rooftop unit on a 12,000-square-foot office. Which statement about load calculation is correct?
A wall assembly has U = 0.08 Btu/h·ft²·°F, area = 2,400 ft², indoor design 70°F, and outdoor design 20°F. What is the conduction heating load?
A commercial space needs 2,000 cfm of outdoor air for ventilation. Indoor air is 70°F and outdoor winter design is 25°F. Using Q = 1.08 × CFM × ΔT, what is the sensible ventilation heating load?
A hydronic heating circuit must deliver 120,000 Btu/h with a 20°F water temperature drop. What flow is required using Q = 500 × GPM × ΔT?
A replacement steam boiler must serve 1,200 square feet of existing cast-iron radiation rated at standard steam EDR. What net output is required at 240 Btu/h per square foot EDR, before pickup or piping factors specified by the manufacturer?
Unless a documented diversity of load is established, IFGC 402.2 requires gas piping to be sized from which demand?
Fuel Gas Systems
Loading more…