What is the correct answer?


According to fan laws, for the fans having constant wheel diameters, the power demand varies

A. Directly as fan speed

B. Square of fan speed

C. Cube of fan speed

D. Square root of fan speed

Correct Answer :

C. Cube of fan speed

Related Questions

A turbine is required to develop 1500 kW at 300 r.p.m. under a head of… Mechanical efficiency of a centrifugal pump is the ratio of The efficiency of a Pelton wheel working under constant head ________… For centrifugal pump impeller, the maximum value of the vane exit angle… Which of the following is not a reaction turbine? The water in a jet propelled boat is drawn through the openings facing… A Pelton wheel is Kinematic similarity is said to exist between the model and the prototype,… The undershot water wheels are those in which A jet of water is striking at the centre of a curved vane moving with… The discharge through a reaction turbine with increase in unit speed If the ratio's of the corresponding forces acting at corresponding points… Head developed by a centrifugal pump depends on Geometric similarity is said to exist between the model and the prototype,… When a piping system is made up primarily of vertical lift and very little… A hydraulic coupling belongs to the category of Which of the following pump is generally used to pump highly viscous fluid? The power developed by a turbine is (where H = Head of water under which… The cavitation in reaction turbines is avoided, to a great extent by In a single casing, multistage pump running at constant speed, the capacity… Braking jet in an impulse turbine is used Indicator diagram of a reciprocating pump is a graph between The force exerted by a jet of water (in a direction normal to flow) impinging… A Pelton wheel develops 1750 kW under a head of 100 metres while running… The maximum number of jets generally employed in impulse turbine without… In a centrifugal pump casing, the flow of water leaving the The gross or total head of the turbine is the ________ of the water levels… Discharge (Q) of a centrifugal pump is given by (where D = Diameter of… Low specific speed of a pump implies it is Which of the following statement is correct as regard to water wheels?