Residential Energy Audit - Chapter 6

98 Questions | By Jacoventer | Last updated: Mar 21, 2022 | Total Attempts: 57

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These questions are based on the following book: Residential Energy: Cost savings and comfort for existing buildings: Chapter 6 - Heating

Questions and Answers

1.

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.
2.

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.
3.

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.
4.

Efficiency =
- A.
  
  Input/output
- B.
  
  Output/input
- C.
  
  Input*output
5.

Generating electricity from coal or oil wastes about ___% of the fuel's potential energy.
- A.
  
  12
- B.
  
  25
- C.
  
  50
- D.
  
  70
6.

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%
7.

In oil & gas heaters burners mix and burn feul in combustion chambers.
- A.
  
  True
- B.
  
  False
8.

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
9.

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
10.

Room heaters have no distribution losses.
- A.
  
  True
- B.
  
  False
11.

Combustion is slow oxidation; oxygen combines with the carbon and hydrogen , splitting the hydrocarbon molecules
- A.
  
  True
- B.
  
  False
12.

What are the main products of combustion?
- A.
  
  Water vapor
- B.
  
  Smoke
- C.
  
  Hydrogen
- D.
  
  Carbon dioxide
13.

Some oxygen goes through combustion without reacting. The percentage of oxygen in _______ gases informs us about the fuel- air mixture.
14.

Unreacted oxygen and unreacted nitrogen absorb heat from the combustion and carry it up the chimney.
- A.
  
  True
- B.
  
  False
15.

6Open-combustion & closed-combustion describe whether the or not the combustion chamber, heat exchanger, flues and chimney are open to the ______________ air.
16.

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)
17.

Draft diverters are designed to prevent excessive updrafts and increase downdrafts.
- A.
  
  True
- B.
  
  False
18.

In a open combustion heater, strong downdrafts may interfere with the burner or extinguish the pilot
- A.
  
  True
- B.
  
  False
19.

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
20.

Select the three common burner types:
- A.
  
  Atmospheric
- B.
  
  Radiant draft burners
- C.
  
  Induced-draft burners
- D.
  
  Power burners
21.

Power burners use a blower to to move combustion gases through the combustion chamber,
- A.
  
  True
- B.
  
  False
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.