Fans

Question 1

What is a Manometer used for?

Answer 1

A Manometer is a U-shaped tube that is connected to the fan for measuring pressures.

Question 2

How can you remove static electricity generated by fans?

Answer 2

Ground the rotating element with a ground brush and cable assembly.

Question 3

Name the two major types of fans according to flow through the impeller.

Answer 3

• Radial flow centrifugal

- Axial flow propeller.

Question 4

What is the name of the circular collection chamber mounted around the fan wheel of a centrifugal fan?

Answer 4

-a scroll

Question 5

Name two ways of placing bearings on a shaft in relationship to the fan wheel.

Answer 5

• The wheel can be mounted between bearings.

- The wheel can be mounted overhung on the shaft.

Question 6

How can control of air through fans be accomplished?

Answer 6

-inlet Louvre, outlet dampers, varying the fan speed.

Question 7

Why are some fans mounted on a base with the aid of springs?

Answer 7

-Fan base springs are used to dampen out fan vibrations transmitted to the base.

Question 8

List three kinds of pressure found in operating fan ducts

Answer 8

• Static
• Velocity
• Total Pressure