Q. The flow ratio of Francis turbine is defined as the ratio of the

View solution

Q. The depth of the bucket for a Pelton wheel is generally __________ the diameter of jet.

View solution

Q. An impulse turbine is used for

View solution

Q. 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.

View solution

Q. The cavitation in reaction turbines is avoided, to a great extent by

View solution

Q. Which type of the pump is different from others in the same group?

View solution

Q. Power required to drive a centrifugal pump is __________ proportional to N3.

View solution

Q. The force exerted (in newton) by a jetof water impinging normally on a fixed plate is (where w = Specific weight of water in N/m³, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)

View solution

Q. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit discharge of wheel is

View solution

Q. Delivery head of a centrifugal pump is

View solution

Q. The power developed by a turbine is (where H = Head of water under which the turbine is working)

View solution

Q. If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

View solution

Q. A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.

View solution

Q. In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.

View solution

Q. A Pelton wheel is

View solution

Q. The discharge through a reaction turbine __________ with the increase in unit speed.

View solution

Q. In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.

View solution

Q. A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.

View solution

Q. Which of the following pump is generally used to pump highly viscous fluid?

View solution

Q. 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.

View solution