Title: Unit 14 Quiz
Course: HET 130 Heating Residential Appliances > Section: HET 130 Heating Residential Appliances

Q: High efficiency furnaces _____.
- have an AFUE rating of 84% and above.
- have secondary heat exchangers.
- use less fuel and produce more heat.
- All of the Above
A: All of the Above

Q: The possible cause of a yellow flame is______.
- lack of primary air.
- flashback during shutoff.
- burner overfiring.
- overbalance of primary air.
A: lack of primary air.

Q: All fossil fuels contain _____ amounts.
- hydrogen and carbon atoms in equal
- hydrogen and carbon atoms in varying
- oxygen and carbon dioxide atoms in equal
- CO2 and carbon monoxide atoms in varying
A: hydrogen and carbon atoms in varying

Q: What grade fuel oil is most commonly used in domestic hun-type burners?
- #1
- #2
- #4
- #6
A: #2

Q: Which items determine the rate at which fuel oil is burned?
- Size of the hole in the nozzle.
- Amounts of oil pressure.
- Length of the nozzle.
- Both A and B
A: Both A and B

Q: One watt equals ______ Btu/hr.
- 3415
- 3.415
- 34.15
- None of the above.
A: 3.415

Q: Electric duct heaters are used primarily as _____.
- space heaters
- supplementary heat sources
- auxiliary heaters
- All of the Above
A: All of the Above

Q: Which type of control is recommended for use with baseboard eletric heat?
- Relief valve.
- Safety limit switch.
- Flow switch.
- Pressure-reducing valve.
A: Safety limit switch.