The propeller axial flow fan:
a. Produces low capacity, low pressure air movement
b. Finds application in unit heaters, air-cooled condensers, and as an exhaust fan for ventilation purposes
c. Is used in commercial air conditioning ducting
d. Requires the least power at minimum air delivery
e. Is used in ducted air distribution systems
Answer: B
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Power Engineering Chapter 127
- Forward curved fans
- Control of the static pressure and horsepower requirements at a given speed is obtained by using
- Centrifugal fans are classified as
- When comparing the tube axial fan with the vane axial fan the main difference between the two is the
- The group of fans which consist of a rotor or wheel having several radial blades, which is mounted on a shaft within the fan housings is
- Backward inclined centrifugal fans:
- Two fan wheels are rotating at the same speed. One wheel has forward curved blades and the other has backward inclined blades. The velocity of the air leaving the forward curved blades is considerably higher, because
- Which of the following statements about fan performance curves is false?
- The two general groups of fans are:
- When a fan outlet is fully open,
- Axial flow fans are classified as:
- The vane axial flow fan:
- Backward inclined airfoil fans:
- Axial flow fans:
- The tube axial flow fan:
- The static pressure measured in an air duct is measured by connecting a:
- To minimize fan vibration problems and premature fan belt wear, it is proper to use
- Total pressure exerted by the air is the sum of:
- Forward curved centrifugal fans:
- With regard to fan capacity control, which of the following devices has a de-clutching feature?
- The two general groups of fans are: