67) The batch of ceiling fans are re-fitted after overhauling. Out of this two fans are found to be wobbling. Which one of the following is the cause of wobbling ?

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

Answer is:

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

Answer is:

Answer is:

jet pump

piston pump

centrifugal pump

submersible pump

Answer is:

length of the unit is more

efficiency is more

suction pipe is not there

diameter of the unit is smaller

Answer is: