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3rd Year > Mechanical Air Movement And Controls > Flashcards

Mechanical Air Movement And Controls Flashcards

1
Q

Describe fan total pressure

A

The sum total of a fan static pressure and its velocity pressure

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2
Q

Describe fan static pressure

A

The difference between found total pressure and discharge velocity pressure

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3
Q

Describe velocity

A

Speed at which air is moving

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4
Q

Describe velocity

A

The pressure exerted as a result of the motion of the airstream

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5
Q

Name two general groups are classes of fans

A

Axial (propeller)
Centrifugal (radial)

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6
Q

Three types of axial flow fans

A

Propeller
Tubeaxial
Vaneaxial

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7
Q

What fan is almost the used the most

A

Propeller

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8
Q

Tubeaxial fans are considered to be what

A

Heavy duty propeller fan

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9
Q

Vaneaxial fans are considered to be what

A

High efficiency

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10
Q

Centrifugal fans are built how

A

In a direction at right angle to the fan

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11
Q

Four types of fan blades

A

Forward curved
Backward inclined
Airfoil blades
Radial blades

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12
Q

13x13x4=……./3.14……square x 2.5 =

A

?

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13
Q

What are performance charts for

A

Cfm
Static pressure
Rpm

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14
Q

Propeller disc fans are designed to

A

Have no ducts

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15
Q

What type of fan is used pollution control with high particulate loads

A

Radial

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16
Q

Which fan should never be used in a duct less system

A

Forward curved blade centrifugal fan

17
Q

Best fan to be used on a blow pipe system saw mill

A

Radial axial flow fan

18
Q

The most accurate volume control of air is obtained using

A

Opposite blade damper

19
Q

Which damper is usually in locations where it’s fully opened or closed

A

Parallel blade

20
Q

Parallel blades are the best for modulating airflow

A

False

21
Q

Can propeller fans handle large volumes of air

A

Large volumes with low static

22
Q

Uses for radial fans

A

Wood chips and grain systems

23
Q

What are air extractors used for

A

They are used to move air when splitters can’t be used

24
Q

Two styles of multi blade dampers

A

Parallel
Opposite

3rd Year (12 decks)

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