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

Author Question: What would the mixed air temperature be for a system with 20 outdoor air if the outdoor temperature ... (Read 39 times)

Shelles

  • Hero Member
  • *****
  • Posts: 582
on: Jul 24, 2018
What would the mixed air temperature be for a system with 20 outdoor air if the outdoor temperature is 90F and the return air temperature is 80F?
 
  A) 0.8  90F =18F; 18F + 80F = 98F mixed air temperature
  B) (90F + 80F)  0.4 = 68F
  C) 0.2  90F =18F; 0.8  80F = 64F; 18F + 64F = 82F mixed air temperature
  D) (90F + 80F)/2 = 85F mixed air temperature

Question 2

Hot Surface Ignition System (HSI) controls lockout after how many unsuccessful attempts?
 
  A) Two attempts B) The controls do not lock out.
  C) Three or more attempts D) One attempt


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ririgirl15

  • Sr. Member
  • ****
  • Posts: 385
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

C


Shelles

  • Member
  • Posts: 582
Reply 2 on: Jul 24, 2018
Wow, this really help

okolip

  • Member
  • Posts: 362
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Body temperature and environmental temperature in homeotherms versus heterotherms. Body temperature and environmental temperature in homeotherms versus heterotherms.
Organization of the vertebrate nervous system. Organization of the vertebrate nervous system.
Measuring Axillary Temperature Measuring Axillary Temperature
The Koeppen System The Koeppen System
Predicted Temperature Trends Through the 21st Century Predicted Temperature Trends Through the 21st Century
A system absorbs 623 J of heat while doing 457 J of work. What is the value of U? A system absorbs 623 J of heat while doing 457 J of work. What is the value of U?
Video: Elementary kinetics

For a complete list of videos, visit our video library