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

Author Question: What is the difference between primary air and secondary air? A) Primary air is used for the main ... (Read 115 times)

lbcchick

  • Hero Member
  • *****
  • Posts: 550
on: Jul 24, 2018
What is the difference between primary air and secondary air?
 
  A) Primary air is used for the main burner and secondary air is used for the auxiliary burners.
  B) Primary air is mixed with the gas before ignition and secondary air is drawn in after ignition.
  C) Secondary air is only used if the primary air source is depleted.
  D) Primary air is used with natural gas and secondary air is used for LP gas.

Question 2

When an air handler has both a DX cooling coil and a hot water heating coil, which coil is located first in the airstream?
 
  A) The two coils are in different airstreams.
  B) The DX cooling coil
  C) The hot water heating coil
  D) The air does not travel over the hot water heating coil.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

akemokai

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 24, 2018
Answer to Question 1

B

Answer to Question 2

C


lbcchick

  • Member
  • Posts: 550
Reply 2 on: Jul 24, 2018
Wow, this really help

pangili4

  • Member
  • Posts: 346
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

The nitrogen cycle. The five main parts of the nitrogen cycle are: The nitrogen cycle. The five main parts of the nitrogen cycle are:
Estimated terrestrial net primary productivity across Canada. Estimated terrestrial net primary productivity across Canada.
Levels of protein structure: Primary structure Levels of protein structure: Primary structure
Horizontal, sagittal, and coronal functional MRIs show areas of increased activity in the primary ... Horizontal, sagittal, and coronal functional MRIs show areas of increased activity in the primary ...
The Primary Motor Cortex The Primary Motor Cortex
RUSP 25 Secondary Conditions for Newborn Genetic Screening RUSP 25 Secondary Conditions for Newborn Genetic Screening
Video: Predator- prey competition and symbiosis

For a complete list of videos, visit our video library