« previous next »

Author Question: In a forced hot-water heating system, the thermal circulation of water is prevented by _____. a. ... (Read 52 times)

bobthebuilder

  • Hero Member
  • *****
  • Posts: 567
on: Jul 24, 2018
In a forced hot-water heating system, the thermal circulation of water is prevented by _____.
 
  a. using small diameter water return lines
  b. using large diameter water return lines
  c. isolating the circulating pump
  d. placing a check valve in the water return line

Question 2

In a given length of pipe, if the flow rate in gallons per minute (gpm) is doubled, pressure drop _____.
 
  a. stays the same
  b. doubles
  c. quadruples
  d. increases slightly


stallen

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 24, 2018
Answer to Question 1

d

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Oceanic circulation, which is driven mainly by the prevailing winds, moderates earth's climate. Oceanic circulation, which is driven mainly by the prevailing winds, moderates earth's climate.
Paranasal sinuses are part of the upper respiratory system. Paranasal sinuses are part of the upper respiratory system.
Saturn’s Ring System Saturn’s Ring System
Procedures and Diagnostic Tests Related to the Cardiovascular System Procedures and Diagnostic Tests Related to the Cardiovascular System
A general model of the sensorimotor system. Notice its hierarchical structure, functional ... A general model of the sensorimotor system. Notice its hierarchical structure, functional ...
The Central and Peripheral Nervous System The Central and Peripheral Nervous System
Video: Hormonal feedback loop components & Glucagon (glycogenolysis and gluconeogenesis)

For a complete list of videos, visit our video library