Explore topic-wise MCQs in Engineering.

Which of the following statement is correct as regard to water wheels?

The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

The efficiency of a reaction turbine for a given head __________ with the increase in speed.

The speed ratio in case of Francis turbine varies from

A Kaplan turbine is preferred for a specific speed of 300 to 1000 r.p.m.

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

The action of a centrifugal pump is that of a reversed reaction turbine.

Which of the following is not a reaction turbine?

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 __________ of the jet velocity

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

The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

Which of the following statement is correct ?

For 450 m head of water, __________ shallbeused.

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.

Which of the following pump is successfully used for lifting water from deep wells?

The Thomson's turbine is __________ reaction turbine.

The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

The ratio of the normal force of jet of water on a plate inclined at an angle of 30 as compared to that when the plate is normal to jet, is

The hydraulic efficiency of an impulse turbine is the

The overall efficiency for a Pelton wheel lies between

Head developed by a centrifugal pump is

If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

Braking jet in an impulse turbine is used

If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

Slip of a reciprocating pump is negative, when

Which of the following is not an impulse turbine?

A hydraulic accumulator is a device used to store __________ energy which may be supplied to a machine later on.

The Furneyron turbine is __________ reaction turbine.

The expansion of steam in a nozzle follows

The velocity of whirl at outlet for an axial discharge turbine is

In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is __________ the relative velocity of steam at inlet tip of the blade.

A reciprocating pump is also called a __________ displacement pump.

The head available at the inlet of the turbine is known as net or effective head.

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

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)

The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.

The maximum hydraulic efficiency of an impulse turbine is (where = Angle of blade tip at outlet)

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

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is

In a reciprocating pump, air vessels are used to

In a Francis turbine, the pressure at inlet is __________ that at outlet.

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

A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is

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

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

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