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

Author Question: What are the noise criteria curves? What will be an ideal ... (Read 56 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 26, 2018
What are the noise criteria curves?
 
  What will be an ideal response?

Question 2

What is the difference between black iron and galvanized iron pipe?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

adf223

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 26, 2018
Answer to Question 1

The industry uses a noise criteria system to designate the level of noise in the area where by the registers will be used. Each NC curve is assigned a number, in 5 decibel increments. The number corresponds to the decibel reading at approximately 1500 Hz.

Answer to Question 2

Black iron is the natural iron finish. Galvanized is dipped in zinc to make it more resistant to corrosion.


penguins

  • Hero Member
  • *****
  • Posts: 903
Reply #2 on: Jul 26, 2018
Both answers were spot on, thank you once again


adf223

  • Sr. Member
  • ****
  • Posts: 304
Reply #3 on: Jul 26, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. ( Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
Dose-Response Curves for Morphine Dose-Response Curves for Morphine
What are examples of ideal forms? What are examples of ideal forms?
Species-area curves Species-area curves
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
Survivorship curves for people in the United States in the early 20th and early 21st centuries Survivorship curves for people in the United States in the early 20th and early 21st centuries
Video: Parkinson's Disease

For a complete list of videos, visit our video library