Question 1

The flow of air in a duct should stay less than 490 ft/min to keep the air flow from being too noisy. The dining room of a house is to have a flow of 150 cu ft/min to have proper air exchange. What should be the smallest duct area going to this room? Round answer to the nearer thousandths sq ft.

Accepted Answer

0.306 sq ft

Question 2

The air flow in a duct in a house should have a speed faster than 50 ft/ min so that it does not lose heat in the winter or gain heat in the summer before reaching the room. The dining room of a house is to have a flow of 150 cu ft/min to have proper air exchange. What should be the largest duct area going to this room?

Accepted Answer

3 sq ft

Question 3

A 3,250 sq ft house with 8 foot ceilings has 3 return ducts. What size must the ducts be to handle 7 exchanges per hour with a flow of 350 ft/min? Round the answer to the nearer hundredth square foot.

Accepted Answer

The answer of A 3,250 sq ft house with 8...

Question 4

What would be the smallest bedroom that should be supplied air by a 10-inch by 12-inch duct with a flow of 50 ft/min for 6 changes each hour? Round the answer to the nearer hundredth cubic foot if needed.

Accepted Answer

The answer of What would be the smallest bedroom that...

Question 5

The units of air flow rate are given in square feet per minute.

Accepted Answer

A) True 
 B)False

Question 6

A fine dining restaurant wants quiet air flow in its dining room, so a duct flow of 250 ft/min is desired. The size of the room requires the duct to have a flow of 1,400 CFM to properly control the room's environment. What is the cross-sectional area of the duct to the nearer tenth square foot?

Accepted Answer

The answer of A fine dining restaurant wants quiet air...

Question 7

A room in a house is 14 feet 6 inch by 12 feet 6 inches. It has 8-ft ceilings. What must the air flow into the room be in cubic feet per minute to have 6 air changes per hour? Round the answer to the nearer hundredth CFM if needed.

Accepted Answer

The answer of A room in a house is 14...

Question 8

The air flow rate in a duct can be found by multiplying the area of the duct times the air speed in the duct.

Accepted Answer

A) True 
 B)False  True

Question 9

A distribution duct has an area of 2.1 sq ft and an air speed of 340 ft/ min. A side duct of 1.0 sq ft splits off. The main duct reduces in size to 1.4 sq ft. What is the air flow in the main duct after the split?

Accepted Answer

The answer of A distribution duct has an area of...

Question 10

A fan produces a flow of 3,400 CFM. What area duct will give an air speed of 350 ft/min in the duct? Round answer to the nearer hundredth square foot.

Accepted Answer

The answer of A fan produces a flow of 3,400...

Exam 33: Air Flow Calculations

The flow of air in a duct should stay less than 490 ft/min to keep the air flow from being too noisy. The dining room of a house is to have a flow of 150 cu ft/min to have proper air exchange. What should be the smallest duct area going to this room? Round answer to the nearer thousandths sq ft.

Correct Answer
verified
0.306 sq ft

Correct Answer
verified
3 sq ft

A 3,250 sq ft house with 8 foot ceilings has 3 return ducts. What size must the ducts be to handle 7 exchanges per hour with a flow of 350 ft/min? Round the answer to the nearer hundredth square foot.

Correct Answer
verified

What would be the smallest bedroom that should be supplied air by a 10-inch by 12-inch duct with a flow of 50 ft/min for 6 changes each hour? Round the answer to the nearer hundredth cubic foot if needed.

Correct Answer
verified

The units of air flow rate are given in square feet per minute.

Correct Answer
verified

A fine dining restaurant wants quiet air flow in its dining room, so a duct flow of 250 ft/min is desired. The size of the room requires the duct to have a flow of 1,400 CFM to properly control the room's environment. What is the cross-sectional area of the duct to the nearer tenth square foot?

Correct Answer
verified

A room in a house is 14 feet 6 inch by 12 feet 6 inches. It has 8-ft ceilings. What must the air flow into the room be in cubic feet per minute to have 6 air changes per hour? Round the answer to the nearer hundredth CFM if needed.

Correct Answer
verified

The air flow rate in a duct can be found by multiplying the area of the duct times the air speed in the duct.

Correct Answer
verified
True

A distribution duct has an area of 2.1 sq ft and an air speed of 340 ft/ min. A side duct of 1.0 sq ft splits off. The main duct reduces in size to 1.4 sq ft. What is the air flow in the main duct after the split?

Correct Answer
verified

A fan produces a flow of 3,400 CFM. What area duct will give an air speed of 350 ft/min in the duct? Round answer to the nearer hundredth square foot.

Correct Answer
verified

Exam 33: Air Flow Calculations

The flow of air in a duct should stay less than 490 ft/min to keep the air flow from being too noisy. The dining room of a house is to have a flow of 150 cu ft/min to have proper air exchange. What should be the smallest duct area going to this room? Round answer to the nearer thousandths sq ft.

Correct Answerverified0.306 sq ft

Correct Answerverified3 sq ft

A 3,250 sq ft house with 8 foot ceilings has 3 return ducts. What size must the ducts be to handle 7 exchanges per hour with a flow of 350 ft/min? Round the answer to the nearer hundredth square foot.

Correct AnswerverifiedShow Answer

What would be the smallest bedroom that should be supplied air by a 10-inch by 12-inch duct with a flow of 50 ft/min for 6 changes each hour? Round the answer to the nearer hundredth cubic foot if needed.

Correct AnswerverifiedShow Answer

The units of air flow rate are given in square feet per minute.

Correct AnswerverifiedShow Answer

A fine dining restaurant wants quiet air flow in its dining room, so a duct flow of 250 ft/min is desired. The size of the room requires the duct to have a flow of 1,400 CFM to properly control the room's environment. What is the cross-sectional area of the duct to the nearer tenth square foot?

Correct AnswerverifiedShow Answer

A room in a house is 14 feet 6 inch by 12 feet 6 inches. It has 8-ft ceilings. What must the air flow into the room be in cubic feet per minute to have 6 air changes per hour? Round the answer to the nearer hundredth CFM if needed.

Correct AnswerverifiedShow Answer

The air flow rate in a duct can be found by multiplying the area of the duct times the air speed in the duct.

Correct AnswerverifiedTrue

A distribution duct has an area of 2.1 sq ft and an air speed of 340 ft/ min. A side duct of 1.0 sq ft splits off. The main duct reduces in size to 1.4 sq ft. What is the air flow in the main duct after the split?

Correct AnswerverifiedShow Answer

A fan produces a flow of 3,400 CFM. What area duct will give an air speed of 350 ft/min in the duct? Round answer to the nearer hundredth square foot.

Correct AnswerverifiedShow Answer

Correct Answer
verified
0.306 sq ft

Correct Answer
verified
3 sq ft

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified