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.

Related MCQs

• The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
• 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
• The principle of jet propulsion is used in driving the ships and aeroplanes.
• The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.
• 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.
• A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.
• The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is
• The maximum number of jets, generally, employed in an impulse turbine without jet interference are
• A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
• In a Francis turbine, the pressure at inlet is