### Related Questions

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# Which of the following pump is successfully used for lifting water to the turbines?

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# The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

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4

# Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

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# The discharge through a turbine is

A. Directly proportional to H^{1/2}

B. Inversely proportional to H^{1/2}

C. Directly proportional to H^{3/2}

D. Inversely proportional to H^{3/2}

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# According to fan laws, at constant speed and capacity, the pressure and power vary

A. Directly as the air or gas density

B. Inversely as square root of density

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# For centrifugal pump impeller, the maximum value of the vane exit angle is

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# Runaway speed of a hydraulic turbine is

B. The speed at which turbine runner will be damaged

C. The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

D. The speed corresponding to maximum overload permissible

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# Which of the following is not a reaction turbine?

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# Pressure intensifier increases the pressure in proportion to

B. Square of ratio of diameters

C. Inverse ratio of diameters

D. Square of inverse ratio of diameters

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

A. Directly proportional to H^{1/2}

B. Inversely proportional to H^{1/2}

C. Directly proportional to H^{3/2}

D. Inversely proportional to H^{3/2}

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4

# According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

A. Directly as the air or gas density

B. Inversely as square root of density

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# In a Francis turbine runner, the numbers of blades are generally between

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# A hydraulic accumulator normally consists of

A. Two cylinders, two rams and a storage device

C. Two coaxial rams and two cylinders

D. A cylinder, a piston, storage tank and control valve

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# If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

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# The impeller of a centrifugal pump may have

B. Volute casing with guide blades

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# The maximum number of jets generally employed in impulse turbine without jet interference is

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# In a centrifugal pump casing, the flow of water leaving the

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# The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

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# The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

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# A hydraulic ram is a device used to

A. Store the energy of water

B. Increase the pressure of water

C. To lift water from deep wells

D. To lift small quantity of water to a greater height when a large quantity of water is available at a smaller height

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# According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

D. Square root of fan speed

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# Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

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# Motion of a liquid in a volute casing of a centrifugal pump is an example of

C. Forced spiral vortex flow

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# A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

A. Pelton wheel with one nozzle

B. Pelton wheel with two or more nozzles

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# High specific speed of a pump implies it is

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# A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)

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# In a reciprocating pump, air vessels are used to

C. Increase delivery head

D. Reduce acceleration head

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# Medium specific speed of a pump implies it is

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# The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

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# Power required to drive a centrifugal pump is directly proportional to ________ of its impeller.

D. Fourth power of diameter