Residential Energy Audit - Chapter 6
These questions are based on the following book: Residential Energy: Cost savings and comfort for existing buildings: Chapter 6 - Heating
- 1.A correctly sized heating system should:
- A.
Heat your home to your desired temperature within an hour.
- B.
Heat your home to your desired temperature within half an hour.
- C.
Heat your home at roughly the same rate it is being lost.
- 2.Room heaters deliver all their heat into ______ area. Central heaters convert fossil fuel or electricity to heat in a central location and use ducts or pipes to distribute the heat.
- 3.Efficiency =
- A.
Input/output
- B.
Output/input
- C.
Input*output
- 4.Generating electricity from coal or oil wastes about ___% of the fuel's potential energy.
- A.
12
- B.
25
- C.
50
- D.
70
- 5.Which of the quantities most accurately represent North America heating fuel usage the best?
- A.
Oil 50%, other 5% electricity 15%, Natural gas 30%
- B.
Oil 5%, other 50% electricity 15%, Natural gas 30%
- C.
Oil 9%, other 9% electricity 29%, Natural gas 53%
- D.
Oil 9%, other 9% electricity 53%, Natural gas 29%
- 6.In oil & gas heaters burners mix and burn feul in combustion chambers.
- A.
True
- B.
False
- 7.The ____________ surrounding the the combustion chamber, transfers heat from the flames and combustion gases to the heating fluid - air, water or steam.
- A.
Air
- B.
Heat exchanger
- C.
Insulation
- 8.The efficiency of a combustion heater depends on losses to:
- A.
Incomplete combustion, chimney losses
- B.
Losses at the beginning and end of the burner cycle
- C.
Distribution
- 9.Room heaters have no distribution losses.
- A.
True
- B.
False
- 10.Combustion is slow oxidation; oxygen combines with the carbon and hydrogen , splitting the hydrocarbon molecules
- A.
True
- B.
False
- 11.What are the main products of combustion?
- A.
Water vapor
- B.
Smoke
- C.
Hydrogen
- D.
Carbon dioxide
- 12.Some oxygen goes through combustion without reacting. The percentage of oxygen in _______ gases informs us about the fuel- air mixture.
- 13.Unreacted oxygen and unreacted nitrogen absorb heat from the combustion and carry it up the chimney.
- A.
True
- B.
False
- 14.6Open-combustion & closed-combustion describe whether the or not the combustion chamber, heat exchanger, flues and chimney are open to the ______________ air.
- 15.Older open combustion heaters also draw indoor air into their chimneys though dilution devices such as
- A.
Valves (oil & gas)
- B.
Draft diverter (gas)
- C.
Barometric draft control (oil)
- 16.Draft diverters are designed to prevent excessive updrafts and increase downdrafts.
- A.
True
- B.
False
- 17.In a open combustion heater, strong downdrafts may interfere with the burner or extinguish the pilot
- A.
True
- B.
False
- 18.Name the mechanism in open combustion oil heaters that adjust dilution air to maintain a consistent chimney draft.
- A.
Barometric draft control
- B.
Temperature draft control
- C.
Infrared draft control
- 19.Select the three common burner types:
- A.
Atmospheric
- B.
Radiant draft burners
- C.
Induced-draft burners
- D.
Power burners
- 20.Power burners use a blower to to move combustion gases through the combustion chamber,
- A.
True
- B.
False
- 21.Name the burner described by the following: An electric motor on the gun burner runs the blower and an oil pump, delivering the oil at a high pressure. The burner's nozzle spays the high-pressure oil into the combustion chamber where it is ignited by sparking electrodes.
- 22.What factors may influence the intensity of chimney draft?
- A.
Taller chimney
- B.
Hotter contents of the chimney
- C.
Lighter contents of the chimney
- 23.Factory build chimneys have multiple wall to
- A.
Allow for a rigid and durable construction.
- B.
Allow for better support
- C.
Allow for closer tolerance
- D.
Keep combustion gases warmer and avoid condensation in the chimney.
- 24.Type-B vent is widely used as gas =appliance chimney.
- A.
True
- B.
False
- 25.__ ______ is preferred for gas appliance chimney, vent connector for 80+ gas furnaces as well as the chimney liner whenever there is space inside a masonry chimney.
Questions: 10 | Attempts: 4993 | Last updated: Jan 29, 2021
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