In an impulse turbine, the jet of water impinges on the bucket with a low velocity and after flowing over the vanes, leaves with a high velocity.

Related MCQs

• In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.
• In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.
• A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.
• A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is
• In a reaction turbine, the water enters the wheel under pressure and flows over the vanes.
• The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.
• The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship, will be maximum when the relative velocity of the jet and ship is equal to twice the velocity of the ship.
• Braking jet in an impulse turbine is used
• The maximum number of jets, generally, employed in an impulse turbine without jet interference are
• The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.