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G3|210 exam Quiz Questions|Test
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Which type of pilot burns at low turndown throughout the entire time the burner is in service, whether or not the main burner is firing, except that upon a call for heat, the fuel flow to the pilot is automatically increased to produce a flame which will reliably ignite the main burner fuel:
A. turndown pilot B. throttling pilot C. expanding pilot D. cycling pilot - ✔ ✔ expanding pilot Which type of pilot is supervised by a primary safety control which must sense the presence of the pilot flame prior to gas being admitted to the main burner:
A. proved pilot B. flame safeguard control C. intermittent pilot D. monitored pilot system - ✔ ✔ proved pilot
What is the term for a device that is installed between the appliance and the vent termination and provides mechanical draft:
A. mechanical inducer B. power burner C. vent exhauster D. power venter - ✔ ✔ power venter A "relief device" in a piping system is a/ an:
A. device used to divert the flow of gas in the event of a runaway condition B. device used to relieve high temperatures that could cause over- pressure C. device designed to open to prevent a rise of gas pressure in excess of a specified value due to emergency or abnormal conditions D. assembly installed in the outlet plenum of a forced air furnace, which opens in the event of high static pressure - ✔ ✔ device designed to open to prevent a rise of gas pressure in excess of a specified value due to emergency or abnormal conditions An indication of excessive primary air is a
A. quenched flame.
B. radiation. C. convection. D. a latent process. - ✔ ✔ radiation Air passing over a heat exchanger is heated by - ✔ ✔ conduction Which method of heat transfer is used in a clothes dryer - ✔ ✔ convection Which method of heat transfer is used in a standard gas-fired oven? - ✔ ✔ convection Which of the following is the safest situation? A. Debris is stacked against equipment to be worked on. B. The pathway to equipment is under water. C. Dim light in work areas making it difficult to read labels on equipment. D. Scrap metal is stacked in a corner away from your work area. - ✔ ✔ D. Scrap metal is stacked in a corner away from your work area. An employer is: A. responsible for ensuring that safety instruction is provided to workers. B. not responsible for ensuring that safety instruction is provided to workers. C. responsible for ensuring that workers arrive safely on the job site.
D. responsible for providing all safety clothing to workers. - ✔ ✔ A. responsible for ensuring that safety instruction is provided to workers. Which of the following is true? A. Workers do not have to wear heard hat off a construction site, even if instructed to do so by the employer. B. Workers must wear the protective clothing that the employer instructs them to wear on the job site. C. Workers do not have to be aware of the contents of the Occupational Health and Safety Act D. Unnecessary running or rough or boisterous conduct on job sites is not prohibited by the Occupational Health and Safety Act. - ✔ ✔ B. Workers must wear the protective clothing that the employer instructs them to wear on the job site. The Workers Compensation Board Act says that in all cases of injury or disease, an employer must: A. make sure first aid is given within two hours.
C. five D. six - ✔ ✔ B. four Which of the following are the key pieces of personal protective equipment? A. hard hat, gloves, ear plugs, dust mask, safety glasses, work boots, face shields B. ladders, hand tools, power tools C. protective clothing, hand tools, face shields, hats D. grounded extension cords, safety glasses, safety boots, hard hat - ✔ ✔ A. hard hat, gloves, ear plugs, dust mask, safety glasses, work boots, face shields
- The fastener used to connect a hose to a fan coil unit is A. a gear clamp. B. copper bailing wire. C. electrical tape. D. a grappler bar. - ✔ ✔ a gear clamp. Shot for powder activated guns is stored: A. in a locked, secure compound. B. in a dry, secure location. C. in the upright position in a secure compound. D. in a locked refrigerated cooler. - ✔ ✔ B) in a dry, secure location.
What is the purpose of a drill gauge? A. To measure the diameter of a drill bit. B. To measure the diameter of a drill. C. To measure the length of a drill. D. To measure the length of a drill bit. - ✔ ✔ To measure the diameter of the drill bit To determine the indicated gas pressure on a water-filled "U" tube manometer. A. read the amount of water column displaced on the pressure side. B. read the amount of water column displaced on the atmospheric side. C. read the amount of water column displaced on the pressure side and add it to the amount displaced on the atmospheric side. D. read the amount of water column displaced on the pressure side and subtract it from the amount displaced on the atmospheric side. - ✔ ✔ read the amount of water column displaced on the pressure side and add it to the amount displaced on the atmospheric side. A reading of 7.0" w.c. equals: A. 1/4psig. (1.72 kPa) B. 1/2 psig. (3.45 kPa)
C. plastic. D. concrete. - ✔ ✔ concrete Lead shields are generally used to anchor fasteners into A. steel. B. wood. C. plastic. D. concrete. - ✔ ✔ concrete Copper wire should be skinned with: A. a knife. B. pliers. C. side cutters. D. a wire stripper - ✔ ✔ wire stripper By definition, the specific gravity of a gas (vapour) is: A. the weight of the gas as compared to the weight of air. B. the weight of the gas as compared to the weight of an equal volume of air. C. the volume of the gas compared to the equal weight of an equal volume of air. D. the volume of the gas as compared to the weight of air. - ✔ ✔ the weight of the gas as compared to the weight of an equal volume of air.
The specific gravity of propane vapour is A. greater than that of air. B. less than that of air. C. the same as that of natural gas. D. less than that of natural gas. - ✔ ✔ greater than that of air. The specific gravity of propane is: A. 0.6" w.c B. 1" w.c C. 1.52" w.c D. 3.5" w.c. - ✔ ✔ 1.52" w.c The lower and upper flammable limits of propane are: A. 2.0% - 11.0% B. 2.4% - 9.5% C. 4.0% - 14.0% D. 5.5% - 14.5% - ✔ ✔ 2.4% - 9.5% The heat content of 1 cubic foot of propane is approximately: A. 1,000 Btu B. 2,500 Btu C. 10,000 Btu D. 25,000 Btu - ✔ ✔ 2,500 Btu
C. 1 1/2 times the relative density of air. D. the relative density of air. - ✔ ✔ 1 1/2 times the relative density of air. The boiling point of propane at atmospheric pressure is: A. -44 °F (-42.2°C) B. -10 °F (-23.3°C) C. 0 F°F (-17.7°C) D. 32 °F (0°C) - ✔ ✔. -44 °F (-42.2°C) When propane changes from a liquid to a vapour, it expands and its volume increases A. 5 times. B. 17 times. C. 185 times. D. 270 times. - ✔ ✔ 270 times. One imperial gallon of propane weighs: A. 5.1 pounds. B. 8.5 pounds. C. 10.0 pounds. D. 25.0 pounds. - ✔ ✔ 5.1 pounds. When one pound of propane burns, it releases approximately:
A. 2,500 Btt u. B. 11,700 Btu. C. 21,600 Btu. D. 60,000 Btu. - ✔ ✔ 21,600 Btu. The products of propane combustion are primarily. A. H and H20 and heat. B. H20 and CO and heat. C. H20, CO2 and heat. D. H and C and heat. - ✔ ✔ H20, CO2 and heat. As the temperature of liquid propane in a tank increases, the vapour pressure of the propane: A. increases. B. decreases. C. remains the same. D. fluctuates. - ✔ ✔ increases The amount of C02 produced per cubic foot of propane burned is: A. 7.6 cu. ft. B. 3.0 cu. ft. C. 18.5 cu. ft.
A. primary air. B. secondary air. C. excess air. D. theoretical air. - ✔ ✔ secondary air. Carbon monoxide is a product of the incomplete combustion of: A. nitrogen. B. oxygen. C. a hydrocarbon. D. an inorganic compound. - ✔ ✔ hydrocarbons Air is about: A. 50% nitrogen and 50% oxygen B. 60% nitrogen and 40% oxygen C. 70% nitrogen and 30% oxygen D. 80% nitrogen and 20% oxygen - ✔ ✔ D. 80% nitrogen and 20% oxygen A luminous flame is caused by: A. premixing air and fuel prior to combustion. B. not premixing air and fuel prior to combustion. C. a low ignition temperature.
D. the presence of carbon monoxide. - ✔ ✔ not premixing air and fuel prior to combustion. A Bunsen flame is caused by: A. premixing air and fuel prior to combustion. B. not premixing air and fuel prior to combustion. C. a low ignition temperature. D. the presence of carbon monoxide. - ✔ ✔ premixing air and fuel prior to combustion. The specific gravity of natural gas is: A. greater than that of air. B. less than that of air. C. the same as that of propane. D. greater than that of propane. - ✔ ✔ less than that of air. Natural gas and propane are composed mainly of: A. carbon and nitrogen. B. carbon and hydrogen. C. carbon monoxide and nitrogen. D. carbon dioxide and hydrogen. - ✔ ✔ carbon and hydrogen. The flame temperature of natural gas is approximately: A. 2500 °F (1371°C)
The odorant added to natural gas for detection purposes is: A. sulphur. B. mustard. C. carbon dioxide. D. mercaptan. - ✔ ✔ mercaptan What is the approximate ignition temperature of natural gas? A. 800°F (427°C) B. 1,200°F(649°C) C. 2,100°F (1,149°C) D. 3,000°F(1649°C) - ✔ ✔ 1,200°F(649°C) The specific gravity of natural gas is: A. 0. B. 1. C. 1. D. 2.00 - ✔ ✔ 0. The major constituents of flue gases after the proper combustion of natural gas in air are: A. CO, H20, N2, excess air, and heat. B. H20, N2, primary air, and heat.
C. C02, H20, N2, 02, and heat. D. 02, CO, N2, H20, and heat. - ✔ ✔ C02, H20, N2, 02, and heat. The two main hydrocarbons which form natural gas are: - ✔ ✔ methane and ethane. What theoretical gas to air ratio is necessary to achieve perfect combustion with an atmospheric natural gas burner? A. 1 part of natural gas to 10 parts of air B. 5 parts of natural gas to 5 parts of air C. 5 parts of natural gas to 15 parts of air D. 20 parts of natural gas to 1 part of air - ✔ ✔ 1 part of natural gas to 10 parts of air Carbon monoxide is produced through: - ✔ ✔ incomplete combustion. The products of complete combustion of natural gas in air are: A. carbon monoxide, water vapour, and heat B. carbon dioxide, water vapour, and heat C. aldehydes, water vapour, and heat D. nitrous oxide, water vapour, and heat - ✔ ✔ carbon dioxide, water vapour, and heat
