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

Author Question: Assume a single-zone constant-volume system with an economizer is installed. In the occupied mode, ... (Read 26 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
on: Jul 24, 2018
Assume a single-zone constant-volume system with an economizer is installed. In the occupied mode, when
  the thermostat calls for cooling, which of the following occurs?
 
  a. The supply air fan stops.
  b. The outdoor dampers move to fully closed.
  c. The economizer acts as the first stage of cooling, if conditions permit.
  d. The relief fan cycles on.

Question 2

The maximum safe concentration of carbon dioxide (CO2) in an occupied space is _____.
 
  a. 900 ppm
  b. 1,000 ppm
  c. 1,200 ppm
  d. 1,500 ppm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Cnarkel

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 24, 2018
Answer to Question 1

c

Answer to Question 2

b


123654777

  • Hero Member
  • *****
  • Posts: 585
Reply #2 on: Jul 24, 2018
Thank you!


Cnarkel

  • Sr. Member
  • ****
  • Posts: 339
Reply #3 on: Jul 24, 2018
Always glad to help...


« previous next »
 

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Overview of the endocrine system in humans. Overview of the endocrine system in humans.
Neural Pathways of the Gustatory System Neural Pathways of the Gustatory System
The digestive system. The digestive system.
The skeletal system. The skeletal system.
The Digestive System "الجهاز الهضمي" The Digestive System "الجهاز الهضمي"
Converting the universal gas constant Converting the universal gas constant
Video: Structures that affect circulation - heart and systolic/diastolic BP

For a complete list of videos, visit our video library