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 95 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
:D TYSM

bigsis44

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

One target for expanding medical services involves vaccinations. Only 78 percent of children ages 19 ... One target for expanding medical services involves vaccinations. Only 78 percent of children ages 19 ...
How would you rate your overall health?” The percent of adults answering “excellent” or ... How would you rate your overall health?” The percent of adults answering “excellent” or ...
Percent of Mothers in the Workforce by Age of Children and Marital Status Percent of Mothers in the Workforce by Age of Children and Marital Status
How to solve simple percent word problems (Part 1) How to solve simple percent word problems (Part 1)
Convert percent to Fraction Convert percent to Fraction
Belief that premarital sex is “not wrong at all,” Canada, 1975—2016 (in percent) Belief that premarital sex is “not wrong at all,” Canada, 1975—2016 (in percent)
Video: Electrical Conduction System of the Heart

For a complete list of videos, visit our video library