G3Module67Test

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George Brown College Canada *

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101

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Mechanical Engineering

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Jan 9, 2024

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Gas Technician III – Module 6 & 7 Test **Do not mark the quesƟon sheet **Mark your answers on the scantron card only **Use only pencil on the scantron card **Write your name, student number, and date on the scantron card Rob Moncrieff rmoncrieff@georgebrown.ca

QuesƟons 1 – 22 please refer to the Goodman GMV9 Manual 1. Should overheaƟng occur, the first step is to: a. Shut the thermostat off b. Shut off the electrical disconnect c. Sit back and allow the furnace to cool down d. Shut off the appliance gas supply valve 2. This appliance may be used as a construcƟon heater. a. True b. False 3. This appliance may be used in the following non-industrial commercial applicaƟons. a. Schools b. Retail Stores c. Churches d. Nursing Homes e. All the above 4. This appliance may be installed in a: a. Mobile Home b. RecreaƟonal Vehicle c. Trailor d. None of the above 5. What is the minimum allowable service clearance in front of this appliance, and does this requirement correspond to the B149:1 code? a. 12”, yes b. 20”, no c. 18”, no d. 12”, no e. 24”, yes 6. When suspending the appliance from raŌers or joists, use _______ threaded rod, and _______________ angle iron. a. 1”, 1” x 2” x 1/4” b. 1/2”, 2” x 2” x 1/16” c. 3/8”, 2” x 2” x 1/8”

d. 2”, 1” x 1” x 1/8” 7. A thermostat must be placed approximately ______ feet from the ﬂoor. a. 5 b. 2 c. 10 d. 6 e. 8 8. Proper outside air requirements are required for: a. VenƟlaƟon Air b. DiluƟon Air c. CombusƟon Air d. All the above 9. Ductwork may be aƩached to the back of this appliance. a. True b. False 10. Leveling the appliance will ensure that: a. the appliance looks good b. the ductwork lines up c. the gas drop is parallel to the ductwork d. the appliance will have proper drainage 11. Electrical and gas connecƟons may be installed into: a. the back panel only b. the right side panel only c. the leŌ side panel only d. either side panels 12. In Ontario, all vent/ﬂue and combusƟon air piping must be installed in accordance with: a. The B149:1 code b. The American NaƟonal Standard c. The B149:1 code and the manufactures requirements d. The Ontario Local Union

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13. According to this manual, gas furnaces in Ontario are cerƟfied to: a. 7000 Ō b. 1000 Ō c. 6000 Ō d. 4500 Ō 14. For non-direct vent (single pipe) applicaƟons, a minimum of ___ 90-degree elbow(s) should be installed on the combusƟon air intake coupling. a. 1 b. 2 c. 3 d. None of the above 15. For non-direct vent (single pipe) applicaƟons, a vent installed through an exisƟng chimney shall extend _____ inches above the top of the chimney. a. 2 b. 8 c. 10 d. 12 e. 14 16. Find the maximum allowable length of vent pipe that can be installed based on the following parameters : Up-ﬂow installaƟon, non-direct vent, 115,000 Btu input, 3” pipe, and 5 elbows used. a. 71 feet b. 59 feet c. 65 feet d. 37 feet e. 28 feet 17. This appliance is shipped with a gas valve rated for: a. 120 volt, Oil b. 24 volt, Natural Gas c. 24 volt, Propane d. 120 volt, Natural Gas 18. The thermostat in a single stage heat, single stage cool applicaƟon must be connected to the integrated control module as such: a. Y to Y, G to G, R to C, W to W2

b. G to G, R to R, Y to Y c. Y to Y, G to G, R to R, W to W1 d. None of the above 19. What is the maximum allowable natural gas input supply pressure to this appliance? a. 10 “ wc b. 7” wc c. 11” wc d. 15” wc 20. A temperature rise measurement that is below the appliances specificaƟon usually indicates: a. Not enough fresh air to the space b. Too much airﬂow across the appliance c. Not enough airﬂow across the appliance d. Blocked supply air registers 21. L.E.D error code 4 indicates: a. Primary limit circuit is open b. Auxiliary limit circuit closed c. Rollout limit circuit is closed d. Auxiliary limit and rollout limit circuit open e. A & D 22. A “conƟnuous on” L.E.D code indicates: a. Pressure switch error b. CommunicaƟon error c. Integrated igniƟon control board failure d. Normal operaƟon QuesƟons 23 – 34 refer to the Raypak Pool Heater Manual 23. Model numbers that begin with the leƩer “P” indicates: a. Bronze headers b. Cast iron headers c. Polymer headers d. Stainless steel headers

24. For elevaƟons above 2,000Ō, the input shall be reduced by _________ percent for each 1,000 Ō above sea level. a. 10 b. 6 c. 8 d. 4 25. For indoor installaƟons, which of the following clearances to combusƟbles are required at the “back” of the appliance? a. 6” b. 2” c. 24” d. 36” e. 8” 26. When this appliance is installed indoors, it must be equipped with: a. A “Pagoda” top insert b. An addiƟonal hi-limit temperature limit c. An indoor heat interlock d. An approved draŌ hood and code compliant vent stack 27. Raypak model 266A requires an unrestricted, outdoor fresh air opening of no less than: a. 101 sq. inches b. 67 sq. inches c. 50 sq. inches d. 266 sq. inches 28. What is the shipping weight of a residenƟal Raypak model 336A with a stackless top, and copper heat exchanger? a. 21 Lbs b. 336 Lbs c. 187 Lbs d. 230 Lbs 29. Which of the following gas fiƫngs should be installed downstream of the manual safety shut off valve, but upstream of the appliances gas valve? a. A field-supplied coupling b. A 10Ō gas connector c. A field-supplied union inside the appliances jacket

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d. A field-supplied street tee e. A field-supplied union outside of the appliances jacket 30. A clockwise adjustment on the appliance’s gas valve will: a. Increase gas pressure b. Decrease gas pressure c. Increase gas valve opening Ɵme d. Decrease gas valve opening Ɵme 31. This appliance may receive 120, or 240 volts from the electrical uƟlity. a. True b. False 32. When this appliance is installed below the water level of a pool or spa, the water pressure switch may have to be adjusted to accommodate: a. A water pressure decrease b. A water pressure increase c. An air pressure increase d. An air pressure decrease 33. Refer to the millivolt ﬂow chart. If a burner does not remain lit, and the technician records a pilot millivolt reading above 500 millivolts, the technician should: a. Replace the gas valve b. Replace the thermostat c. Replace the pool heater d. Replace the on/off switch e. None of the above 34. Refer to the digital ﬂow chart. If a technician finds that the PC board is not receiving power, the manufacturer recommends: a. Replacing the PC board b. Checking line voltage c. Checking the low voltage transformer d. Verifying that the line voltage is not 208 vac e. B, C, & D 35. If a residenƟal customer authorizes a technician use of their driveway, the technician should:

a. Drive straight in b. Check the vehicle for ﬂuid leaks then drive straight in c. Check the surrounding area and back in d. Check the surrounding area, check the vehicle for ﬂuid leaks, and drive straight in e. Check the surrounding area, check the vehicle for ﬂuid leaks, and back in 36. Which of the following should be included in a service report/work order? a. Customers bank account informaƟon b. Model and serial number of the equipment worked on c. Customers full name and address d. All the above e. B and C