This topic contains a solution. Click here to go to the answer

Author Question: Assume a single-zone constant-volume system with an economizer is installed. In the occupied mode, ... (Read 34 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
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
Answer to Question 1

c

Answer to Question 2

b





 

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

For a complete list of videos, visit our video library