This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why do gas furnace efficiencies jump from 80 percent to 90 percent? A) The blower used with 85 ... (Read 75 times)

cmoore54

  • Hero Member
  • *****
  • Posts: 568
on: Jul 24, 2018
Why do gas furnace efficiencies jump from 80 percent to 90 percent?
 
  A) The blower used with 85 percent furnaces cannot be used for air conditioning.
  B) Federal regulations do not allow the production of mid-efficiency furnaces.
  C) By installing a recuperative coil ahead of the main heat exchanger.
  D) The physics of combustion make it impossible to produce an 85 percent efficient furnace.

Question 2

What problems can be caused by overlubricating a blower motor?
 
  A) The blower motor could run faster than specifications recommend.
  B) The motor would run more effectively with the extra lubrication.
  C) This could eventually cause the motor windings to short out.
  D) It is not possible to overlubricate a motor.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Mholman93

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

C


cmoore54

  • Member
  • Posts: 568
Reply 2 on: Jul 24, 2018
Wow, this really help

skipfourms123

  • Member
  • Posts: 343
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Independent assortment produces 50 percent recombinants Independent assortment produces 50 percent recombinants
Rotating Furnace for Making Parabolic Telescope Mirrors Rotating Furnace for Making Parabolic Telescope Mirrors
Identical twins share 100 percent of their segregating genes. Identical twins share 100 percent of their segregating genes.
Outcome of myocardial infarction. Forty percent of 1-week survivors have late complications ... Outcome of myocardial infarction. Forty percent of 1-week survivors have late complications ...
How to solve any percent efficiency problem How to solve any percent efficiency problem
Determine the mass percent of Fe3+ in a 0.546g sample of iron ore, if 22.40 mL of a 0.1000 M ... Determine the mass percent of Fe3+ in a 0.546g sample of iron ore, if 22.40 mL of a 0.1000 M ...
Video: Monohybrid crosses

For a complete list of videos, visit our video library