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 25 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?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

The vertebrate vestibular system. The vertebrate vestibular system.
The female reproductive system. (a) Sagittal section through the pelvis. (b) Top view of pelvic orga The female reproductive system. (a) Sagittal section through the pelvis. (b) Top view of pelvic orga
the basal ganglia and limbic system the basal ganglia and limbic system
A properly mounted 12-lead, single channel ECG. A properly mounted 12-lead, single channel ECG.
The lymphatic system. The lymphatic system.
The Human Olfactory System The Human Olfactory System
Video: Automated external defibrillator (AED)

For a complete list of videos, visit our video library