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

Author Question: What is the primary difference between air-cooled condensers on lower-efficiency systems and those ... (Read 113 times)

tatyanajohnson

  • Hero Member
  • *****
  • Posts: 569
on: Jul 24, 2018
What is the primary difference between air-cooled condensers on lower-efficiency systems and those on high-efficiency systems?
 
  A) The coil size is decreased to raise the head pressure and increase the temperature difference.
  B) The condenser coils are made from steel instead of copper or aluminum.
  C) The number of fins per inch is reduced to reduce the restriction to airflow.
  D) The coil size is increased to increase the heat-transfer area.

Question 2

The chemical in CFCs that contributes to ozone depletion is:
 
  A) Carbon. B) Chlorine. C) Fluorine. D) Hydrogen.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Dinolord

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

B


tatyanajohnson

  • Member
  • Posts: 569
Reply 2 on: Jul 24, 2018
:D TYSM

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Interrelationships of the integumentary system with other body systems Interrelationships of the integumentary system with other body systems
Number of lower molar cusps is one of the features used to distinguish sundadonts from sinodonts. Number of lower molar cusps is one of the features used to distinguish sundadonts from sinodonts.
Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t
Review of Systems ROS Cont. Review of Systems ROS Cont.
Major Wind Systems: Foehn, Chinook, and Santa Ana Winds Major Wind Systems: Foehn, Chinook, and Santa Ana Winds
Major Wind Systems: Sea and Land Breezes Major Wind Systems: Sea and Land Breezes
Video: Krebs cycle : Formation of acetyl coenzyme A and Electron transport chain

For a complete list of videos, visit our video library