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48 Cards in this Set
- Front
- Back
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Heat exchangers in modern gas fired furnaces are made of: a. Brass b. Copper c. Aluminum d. Steel e. Cast iron |
Steel |
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Electronic filters will remove: a. All particles from the air b. Fine particles from the air c. Odours d. Smoke e. Carbon monoxide |
Fine particles from the air |
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The warm air outlets in a warm air heating system should always be located along the: a. Inside walls of the rooms at or near the floor level b. Outside walls of the rooms on or near the ceiling and preferably over the windows c. Inside walls of the rooms near the ceiling d. Outside walls of the rooms at or near the floor level and preferably under the windows e. North-facing walls |
Outside walls of the rooms at or near the floor level and preferably under the windows |
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Plugged _____ on warm air heating and ventilating systems limit the air flow, and result in insufficient heating and fuel wastage. a. Filters b. Heat exchangers c. Diverters d. Univents e. Convectors |
Filters |
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Standard mechanical air filters will remove: a. All particles in the air b. Fine particles in the air c. Smoke in the air d. Odour in the air e. Coarse dust in the air |
Coarse dust in the air |
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The sealed ball bearings used on a blower in the warm air heating systems: a. Require regular lubrication b. Require a few drops of oil once or twice a year c. Should be dismantled every two years for maintenance d. Should be dismantled every five years for maintenance e. Require no lubrication |
Require no lubrication |
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Air filters can be divided into two groups: a. Permanent and disposable b. Washable and dry-clean only c. Dry and viscous d. HEPA and MERV e. Mechanical and electronic |
Mechanical and electronic |
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Most warm air heating furnaces are often equipped with a _____ to supply moisture to the air during the dry winter season. a. Dehumidifier b. Humidifier c. Water sprayer d. Steamer e. Vaporizer |
Humidifier |
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Furnace heat exchangers should be checked for corrosion because: a. Carbon monoxide could leak into the building b. The holes reduce the furnace efficiency c. Cold air could leak into the building d. The air will become too dry for comfortable heating e. Too much air would enter the furnace |
Carbon monoxide could leak into the building |
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Supply outlets should always be located: a. In walls b. In floors c. In ceiling d. To best prevent cold drafts e. In baseboards |
To best prevent cold drafts |
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Insufficient heat throughout a building is likely caused by: a. Too much ventilation b. Insufficient heat input c. Poorly insulated ducting d. A missing filter e. An unbalanced system |
Insufficient heat input |
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Which of the following is the most common type of warm air outlets used in a house? a. Ceiling diffusers b. Wall diffusers c. Perforated panels d. Wall registers e. Floor registers |
Floor registers |
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The perimeter loop system of furnace ducting is ideal for a building with: a. No insulation in the walls b. Concrete walls c. No basement d. Low headroom in the basement e. No cold air returns |
No basement |
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An electronic filter is also known as: a. an ionic filter b. a HEPA filter c. a static filter d. an air-purifier e. an electrostatic filter |
an electrostatic filter |
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Rooms that are stuffy and dry are created by: a. Poor air distribution b. A low supply air temperature c. Too much ventilation air d. Poorly insulated ducts e. Lack of ventilation |
Lack of ventilation |
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When fan belts show signs of fraying, cracking, and wear, they should be: a. Repaired b. Replaced c. Reported d. Re-tightened e. Realigned |
Replaced |
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Sleeve bearings on furnace fans require: a. No lubrication b. Grease every six months c. A few drops of oil every six months d. A few drops of oil monthly e. Fluid lubrication |
A few drops of oil every six months |
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Proper ventilation makes a building comfortable and habitable for its occupants. Which of the following is NOT a function of effective ventilation? a. to provide fresh air b. to remove smoke from the air c. to prevent condensation on the walls d. to create air circulation e. to increase the humidity of the air |
to increase the humidity of the air |
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Electrostatic filters are highly efficient in the removal of: a. Odours b. Fine dust, smoke, and fumes c. Bacteria and spores d. Lint e. Mists and fogs |
Fine dust, smoke, and fumes |
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The activated carbon used for absorbing odours can often be reactivated a. by heating it b. by cooling it c. by exposing it to a DC current d. with chlorine bleach e. by soaking it in water |
by heating it |
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Actual ventilation rates may vary per person from: a. 0.5 m3/sec to 0.6 m3/sec b. 0.5 m3/min to 0.75 m3/min c. 0.2 m3/m to 1.2 m3/min d. 0.14 m3/min to 1.5 m3/min e. 1.0 m3/hour to 1.5 m3/hour |
0.14 m3/min to 1.5 m3/min |
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Activated carbon will absorb odours and objectionable gases by up to _____ of its own weight before requiring replacement. a. 10% b. 20% c. 30% d. 40% e. 50% |
20% |
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The disadvantage of a natural air intake, mechanical exhaust ventilation system is the intake air: a. Tends to draw in exhausted air b. Volume is too large c. Volume is too low d. Is neither filtered nor heated e. Has too much moisture |
Is neither filtered nor heated |
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Which one of the following air cleaning devices can be used for the removal of gases and vapour? a. Dry filters b. Air washers c. Electronic air cleaners d. Charcoal absorbers e. Air sterilizers |
Charcoal absorbers |
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Viscous filters are highly efficient in the removal of: a. Fine dust, fumes, and smoke b. Bacteria and spores c. Cooking odours d. Dust and pollen e. Mists and fogs |
Dust and pollen |
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In a mechanical air intake, natural exhaust ventilation system, the pressure in the building is: a. Well below atmospheric pressure b. Slightly below atmospheric pressure c. At atmospheric pressure d. Slightly above atmospheric pressure e. Well above atmospheric pressure |
Slightly above atmospheric pressure |
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Which of the following Is not an airborne contaminant? a. Dust b. Smoke c. Fumes d. Pollen e. Moisture |
Moisture |
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The advantage of a mechanical ventilation system is: a. The system is self powered b. The system supplies a controlled amount of filtered and heated air. c. The entire system only requires one fan. d. It stratifies the air, to help with filtration e. There are no ducts required |
The system supplies a controlled amount of filtered and heated air. |
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One of the advantages of a common exhaust duct system used for ventilation in a large building is: a. No fan to maintain b. The building can be maintained at a slight negative pressure at all times. c. Only one fan to maintain d. Windows can be eliminated e. No power is required |
Only one fan to maintain |
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Ultraviolet light is used to remove _____ from the air. a. Dust and pollen b. Fine dust and smoke c. Bacteria and spores d. Mists and fogs e. Lint |
Bacteria and spores |
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In the past the most popular method used to provide ventilation in a residence or small building has been by: a. Mechanical ventilation b. Natural ventilation c. Forced air d. Convection e. Unit ventilator |
Natural ventilation |
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Electronic air cleaners are divided into ____________ air cleaners. a. Commercial and residential b. impingement and non-impingement c. High voltage and low voltage d. Electrostatic precipitators and charged media e. AC and DC |
Electrostatic precipitators and charged media |
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Most gas-fired infrared heaters use the principle of: a. Indirect heating of a gas b. Heating a solid surface c. Heating a liquid d. Heating a porous material e. Catalytic oxidation of a fuel at high combustion temperatures |
Heating a solid surface |
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In an open wire type, heating element, the resistance wire is made of: a. Tungsten b. Magnesium oxide c. Mica d. Steel e. Nickel-chromium |
Nickel-chromium |
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Of the following, which is a method of indirect electric heat? a. Baseboard heaters b. Electric boilers c. Radiant panel heaters d. Wall heaters e. Unit heaters |
Electric boilers |
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Infrared heaters are usually mounted: a. Overhead b. At shoulder height c. In floors d. Under windows e. Over doors |
Overhead |
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In an electric snow melting unit, a thermostat should be used to automatically shut the system down when the outdoor temperature is above:a. 0°C b. 1°C c. 2°C d. 3°C e. 4°C |
2°C |
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In an internally fired, gas-fired infrared heater, the surface temperature is about: a. 300°C b. 400°C c. 500°C d. 600°C e. 700°C |
400°C |
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Electrical heating can be divided into two general groups: a. Radiant and convective b. Direct and indirect c. AC and DC d. Radiant panel and infrared e. Ultraviolet and infrared |
Direct and indirect |
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Infrared heaters send out _____ energy in the form of invisible infrared waves that travel in straight lines through the air. a. Convection b. Conduction c. Radiant d. Microwave e. Electrical |
Radiant |
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A low temperature catalytic heater contains a layer of: a. Metal impregnated with a ceramic material b. Wool fiber impregnated with a catalyst c. A ceramic mat impregnated with a catalyst d. Glass wool impregnated with a catalyst e. Porous glass impregnated with a catalyst |
Glass wool impregnated with a catalyst |
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Which of the following is not a gas-fired infrared heater? a. Surface combustion heater b. Low temperature catalytic heater c. Quartz tube heater d. Vented heater e. Directly fired |
Quartz tube heater |
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One of the advantages of electric heating over other heating systems is: a. Low operating cost b. No fuel storage or handling equipment c. Ideal for large warehouses d. High operating temperatures e. It can be direct or indirect |
No fuel storage or handling equipment |
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Infrared radiant energy is directed towards: a. Ceilings b. Walls c. Windows d. Floors e. Doors |
Floors |
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Infrared heaters are used in: a. Theaters b. Lecture halls c. Libraries d. Skating rinks e. Offices |
Skating rinks |
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One of the advantages of gas-fired infrared heating over other types of heating systems is: a. It can heat a large volume enclosure with little fuel b. It requires no fuel handling equipment c. It eliminates the need for ventilation d. It can provide effective spot heating e. It can be used efficiently as the main heating source for a large building |
It can provide effective spot heating |
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The quartz lamp heating element will respond: a. Instantaneously b. In a few seconds c. In about one minute d. In about thirty seconds e. In about three minutes |
In a few seconds |
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Your plane crashes and you wash up on a deserted island, what badass mofo you want with you? a. Harambe b. Oliver Queen c. Robinson Crusoe d. David e. Brian Robeson |
David of course! (Harambe is a close second) |
