length of the blade from fan centre
the distance between adjacent blade tips
the diameter of the circle formed by the blade tips of the fan
the breadth and length of the blade
The rotor of the fan is changed
The bearing of the fan is changed
The rotor position is changed
The blades of the fan is changed
the blades are out of balance
the spur gear with broken teeth
the defective speed control switch
the loose guards
2
3
4
5
jet pump
piston pump
centrifugal pump
submersible pump