Part #3

Question 1

21. To correct a symptom such as a fluctuating flame, a technician should first:

Answer 1

a. Notify the local utility or fuel supplier
b. Contact the equipment supplier
c. Consult the manufacturer’s instructions (c)
d. Exchange the appliance and contact the manufacturer

Question 2

22. On a roof with a 12/12 pitch and no obstructions, the minimum vent height for natural gas fired appliance is:

Answer 2

a. 2 Feet
b. 4 Feet (b)
c. 6 Feet
d. 10 Feet

Question 3

24. What is the best policy for arguing with customers?

Answer 3

a. Stare at the customer with a look of disgust when they are speaking
b. Call your supervisor and let the customer argue with them
c. Use a steady, raised and confident voice
d. Always avoid conflict and arguments with customers (D)

Question 4

25. Which of the following gases is unlikely to be detected in the flue gas analysis:

Answer 4

a. Oxygen and Carbon Monoxide
b. Carbon Dioxide and Nitrogen
c. Helium and Chlorine (C)
d. Hydrogen and Carbon

Question 5

26. Where premises are connected to a supply of gas for the first time, no person shall initially activate an appliance until:

Answer 5

a. The fuel distributor has been notified
b. The fuel distributor has examined and accepted the installation (B)
c. The owner has examined and accepted the installation
d. Regulatory authority has examined and accepted the installation

Question 6

27. Why should garbage and debris be removed from a job site:

Answer 6

a. To reduce the possibility of tool loss in debris
b. To reduce the likelihood of rodents on the job site
c. To prevent possible slips, trips or falls (C)
d. To present a neat appearance

Question 7

28. Size the low-pressure piping system shown in the figure below. What type of pipe is used?

Answer 7

a. Black iron pipe (A)
b. S636 pipe
c. Copper pipe
d. Plastic pipe

Question 8

29. What theoretical gas to air ratio is necessary to achieve perfect combustion with an atmospheric natural gas burner?

Answer 8

a. 20 parts of natural gas to 1 part 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. 1 parts of natural gas to 10 parts of air (D)

Question 9

30. The major constituents of flue gases after the proper combustion of natural gas in air are:

Answer 9

a. H2O, N2, Primary air and Heat
b. CO2, H2O, N2, O2 and Heat (B)
c. O2, CO, N2, H2O and Heat
d. CO, H2O, N2, Excess Air and Heat

Question 10

23. Gasket material used on gas or propane system shall be?

Answer 10

a. Polypropylene
b. Neoprene (B)
c. Natural Rubber
d. Silicone