G3 Quiz 22

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Question 1 of 10

1. Question
63)what are transformers which produce a secondary voltage which is lower than the primary called
- a)step down transformers
- b)step up transformers
- c)auto transformers
- d)neutral transformers
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Question 2 of 10

2. Question
64)what is the millivolt (open test) out put of a thermocouple
- a)10 to 15
- b)20 to 25
- c)25 to 35
- d)25 to 30
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Question 3 of 10

3. Question
65)can a G3 certificate holder, under direct supervision, install gas piping to a 450 cfg boiler
- a) yes
- b) no
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Question 4 of 10

4. Question
66)what cools flue gasses
- a)primary air
- b)blower fan
- c) draft device
- d)excess air
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Question 5 of 10

5. Question
67)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
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Question 6 of 10

6. Question
68)By definition, the specific gravity of 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
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Question 7 of 10

7. Question
69)What should MSDS sheets be used for by a technician?
- A) To be aware of flammable, corrosive, or explosive substances
- B) To know what materials are available for the technicians' use
- C) To know the best brand of product to purchase.
- D) To be aware of the best source of lubricants for machinery on site
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Question 8 of 10

8. Question
70)The amount of air required to BURN 1 cubic foot (0.028 cu. m.) of propane is approximately
- A) 5.0 cu. ft. (0.14 cu. m.)
- B) 10.0 cu. ft. (0.28 cu. m.)
- C) 12.0 cu. ft. (0.34 cu. m.)
- D) 25.0 cu. ft. (0.71 cu. m.)
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Question 9 of 10

9. Question
71)The air found in the products of combustion after the complete combustion of natural gas or propane is called
- A) primary air
- B) secondary air
- C) excess air
- D) dilution air
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Question 10 of 10

10. Question
72)Air that is mixed with fuel at the point of combustion and around the flame is
- A) primary air.
- B) secondary air.
- C) excess air.
- D) theoretical air
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G3 Quiz 22

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