Ac332 Gas Heat
There are different ways to produce heat and gas is one of the most common ways and this heat can be used to power up machines and cook. Are you in the air force and have some knowledge on gas heat? Take up the quiz below and see how much you know so far.
- 1.
If there is too much primary air, the gas flame can ______.
- A.
Get blown out
- B.
"lift" off the burner rack
- C.
Make noise
- D.
Both b and c
Correct Answer
D. Both b and c -
- 2.
A furnace with a vertical air flow through the heat exchanger and the blower compartment beneath the heat exchanger is called a(n) ______.
- A.
Upflow
- B.
Downflow
- C.
Low boy
- D.
Horizontal
Correct Answer
A. Upflow -
- 3.
The proper color of a gas flame is ______.
- A.
Sharp all blue
- B.
Lazy all blue
- C.
Blue with slight orange tips
- D.
Lazy with yellow tips
Correct Answer
C. Blue with slight orange tips -
- 4.
Primary air adjusters on atmospheric type gas burners are usually ______.
- A.
Butterfly shutters
- B.
Sliding sleeves
- C.
Spoilers screws
- D.
All of the above
Correct Answer
D. All of the above -
- 5.
The orifice is a precisely sized hole in the ______.
- A.
Manifold
- B.
Spud
- C.
Burner tube
- D.
Combustion chamber
Correct Answer
B. Spud -
- 6.
In a conventional gas furnace, the hot flue gases are ______.
- A.
Forced out a PVC vent with a blower
- B.
Recycled through a secondary heat exchanger and then vented through a draft diverter
- C.
Forced through a type B vent by a blower
- D.
Vented by natural convection
Correct Answer
D. Vented by natural convection -
- 7.
A condensing gas furnace uses ______ from a condensing type heat exchanger to increase the furnace efficiency.
- A.
Sensible heat
- B.
Latent heat
- C.
Superheat
- D.
Subcooling
Correct Answer
B. Latent heat -
- 8.
The reason for using zones valves on a hydronic heating system is to ______.
- A.
Allow different areas of the structure to maintain different temperatures
- B.
Reduce the chance of a water leak
- C.
Prevent unused parts of the house from getting warm, and wasting energy
- D.
Both a and c
Correct Answer
D. Both a and c -
- 9.
Air in a hydronic system can cause ______.
- A.
Reduced water circulation
- B.
Increased efficiency
- C.
Corrosion
- D.
Both a and c
Correct Answer
D. Both a and c -
- 10.
A pressure relief valve is set at 30 psig. The valve is constantly opening and flooding the floor. What should the technician do?
- A.
Increase the set point of the relief valve to 40 psig.
- B.
Find the cause of overfiring.
- C.
Put a bucket under the valve.
- D.
Both a and c are correct.
Correct Answer
B. Find the cause of overfiring. -
- 11.
A series loop hydronic system is not desirable for use in a large residence because ______.
- A.
All of the heated water will flow to all the rooms
- B.
Some rooms will overheat before other rooms are warm
- C.
They are extremely noisy
- D.
Both a and b
Correct Answer
A. All of the heated water will flow to all the rooms -
- 12.
A limit control on a hot water boiler is need to ______.
- A.
Regulate the amount of water to each section of baseboard
- B.
Regulate the water in the supply line to the boiler
- C.
Balance the water flow rate in the piping system
- D.
Protect the boiler against excessive water temperatures
Correct Answer
D. Protect the boiler against excessive water temperatures -
- 13.
The pressure relief valve ______.
- A.
Regulates the pressure of the water in the supply line
- B.
Is set to relieve the pressure in the boiler below the maximum design pressure of the boiler
- C.
Shuts the boiler off if the water temperature gets too high
- D.
Relieve the pressure in the expansion tank
Correct Answer
B. Is set to relieve the pressure in the boiler below the maximum design pressure of the boiler -
- 14.
The expansion tank provides a means of removing the air from the system as well as ______.
- A.
Provides a space for excess water from the supply source
- B.
Provides water for the domestic hot water coil
- C.
Provides a space for the water expansion and contraction with water temperature changes
- D.
All of the above
Correct Answer
C. Provides a space for the water expansion and contraction with water temperature changes -
- 15.
An expansion joint is a device used to ______.
- A.
Prevent damage between boiler sections
- B.
Connect the expansion tank into the system
- C.
Allow for expansion and contraction of the loop piping with water temperature changes
- D.
Connect the manual vent into the system
Correct Answer
C. Allow for expansion and contraction of the loop piping with water temperature changes -
- 16.
In a series loop hydronic heating piping systems, ______.
- A.
The heated water flows in the same direction in parallel pipes
- B.
The heated water flows in the opposite direction in parallel pipes
- C.
Part of the heated water is directed to each terminal unit
- D.
All the heated water flows through all the terminal units
Correct Answer
D. All the heated water flows through all the terminal units -
- 17.
A column of water on foot high exerts a pressure of ______.
- A.
0.396 psig
- B.
0.407 psig
- C.
0.433 psig
- D.
0.496 psig
Correct Answer
C. 0.433 psig -
- 18.
Air in the hot water circulating system will cause ______.
- A.
Corrosion
- B.
Noise
- C.
Flow blockage
- D.
All of the above
Correct Answer
D. All of the above -
- 19.
If flue gases are not vented properly, carbon monoxide poisoning could result.
- A.
True
- B.
False
Correct Answer
A. True -
- 20.
Liquified petroleum (LP) is heavier than air and can cause suffocation if not handled properly.
- A.
True
- B.
False
Correct Answer
A. True -
- 21.
A gas furnace designed for use with natural gas can be used with liquified petroleum (LP) with no system modifications.
- A.
True
- B.
False
Correct Answer
B. False -
- 22.
A gas flame will carry electrical energy.
- A.
True
- B.
False
Correct Answer
A. True -
- 23.
In the USA, natural gas suppliers supply gas with a heat content of about 1,050 Btu/cu. ft.
- A.
True
- B.
False
Correct Answer
A. True -
- 24.
The gas flame will lift off the burner and be noisy if it receives too much primary air.
- A.
True
- B.
False
Correct Answer
A. True -
- 25.
When an oil or gas boiler is used, the water chamber is divided into smaller compartments to increase the surface area on which the heat can act.
- A.
True
- B.
False
Correct Answer
A. True -
- 26.
If a parallel hydronic system is installed, it may be necessary to bleed air from each of the parallel circuits.
- A.
True
- B.
False
Correct Answer
A. True -
- 27.
Expansion tanks must always be bled from the top until all of the air is removed from it.
- A.
True
- B.
False
Correct Answer
B. False -
- 28.
It is possible for a hydronic system with many zones to operate with one circulation pump.
- A.
True
- B.
False
Correct Answer
A. True -
- 29.
Hydronic heat circulators are centrifugal pumps.
- A.
True
- B.
False
Correct Answer
A. True -
- 30.
In a series loop, the water going through the last terminal unit will be the same temperature as the water through the first terminal unit.
- A.
True
- B.
False
Correct Answer
B. False -
- 31.
The only place a bleed valve is needed is on the top of the boiler.
- A.
True
- B.
False
Correct Answer
B. False -
- 32.
A tankless domestic water system provides hot water from a coil in the boiler.
- A.
True
- B.
False
Correct Answer
A. True -
- 33.
Butterfly shutters and sliding sleeves are examples of ______ and are used on atmospheric type gas burners.
Correct Answer
air adjusters - 34.
Three products of complete combustion of natural and LP gas are ______, ______, and ______.
Correct Answer
carbon dioxide, oxygen, water vapor - 35.
Another name for a downflow heating unit is ______.
Correct Answer
counter flow - 36.
A furnace with a horizontal heat exchanger and a propeller fan for moving air through the heat exhanger is called a ______.
Correct Answer
heater unit - 37.
The dangerous by-product of poor combustion of a gas is ______.
Correct Answer
carbon monoxide - 38.
Spark ignition is important for roof top or package units located outdoors because of ______ problems.
Correct Answer
wind
weather - 39.
Hydronic heating can refer to both ______ and ______.
Correct Answer
water, steam
steam, water - 40.
The device that will shut down a boiler if the water temperature gets too high is called a ______.
Correct Answer
fan limit control - 41.
The most popular way of heating using a hot water system is by the use of ______ on the other outer walls of the area.
Correct Answer
fin-tube base boards - 42.
The zone control valves are controlled by ______.
Correct Answer
zone thermostat - 43.
The main source of air into a hydronic system is the ______.
Correct Answer
water supply - 44.
Hot water boiler limit controls are usually set at ______ °F.
Correct Answer
200 - 45.
Circulators in hydronic systems use impellers with vanes between side panels. These are called ______ impellers.
Correct Answer
closed - 46.
The material used to make circular impellers is ______.
Correct Answer
bronze - 47.
An automatic air bleed valve controls the airflows out of the system by means of a ______.
Correct Answer
float
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 17, 2022Quiz Edited by
ProProfs Editorial Team -
Jan 11, 2010Quiz Created by
Azortex
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