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

Author Question: What advantage is there to maintaining a negative pressure on the heat exchanger? A) The vent ... (Read 103 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
on: Jul 24, 2018
What advantage is there to maintaining a negative pressure on the heat exchanger?
 
  A) The vent will not work unless the heat exchanger is at a negative pressure.
  B) The negative pressure helps draw in return air from the house, increasing efficiency.
  C) Safety; it ensures combustion products do not leak out into the air stream.
  D) Combustion air can only be drawn into the oil burner if a negative pressure is maintained.

Question 2

How does soot accumulation on the inside of the heat exchanger affect system efficiency?
 
  A) The soot acts like an insulator on the inside of the heat exchanger, thereby reducing efficiency.
  B) The soot provides extra fuel during the high-fire stage, thereby increasing efficiency.
  C) The soot increases the heat exchanger internal resistance, thereby increasing efficiency.
  D) The soot acts like an insulator on the inside of the heat exchanger, thereby increasing efficiency.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lkanara2

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

A


123654777

  • Member
  • Posts: 585
Reply 2 on: Jul 24, 2018
Gracias!

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ... The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ...
A typical direct-injection system uses two pumps—one low-pressure electric pump in the fuel tank ... A typical direct-injection system uses two pumps—one low-pressure electric pump in the fuel tank ...
Bracing the head while applying pressure to the neck. Bracing the head while applying pressure to the neck.
Apply thumb pressure to forearm muscles, particularly the extensors muscles. Apply circular friction ... Apply thumb pressure to forearm muscles, particularly the extensors muscles. Apply circular friction ...
The cell wall of a Gram-negative bacterium, E. coli The cell wall of a Gram-negative bacterium, E. coli
Video: Protein catabolism - deamination

For a complete list of videos, visit our video library