Which of the following statement is correct ?
The function of guide vanes in a reaction turbine is to
A reciprocating pump is also called a __________ displacement pump.
Which of the following pump is sucessfully used for lifting water to the boilers?
Power required to drive a centrifugal pump is __________ proportional to N3.
In an inward flow reaction turbine
Manometric head is the actual head of water against which a centrifugal pump has to work.
The head available at the inlet of the turbine is known as net or effective head.
The efficiency of a reaction turbine for a given head __________ with the increase in speed.
If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.
The jet ratio is defined as the ratio of the
The working of which of the following hydraulic units is based on Pascal's law?
The hydraulic efficiency of an impulse turbine is the
In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.
The undershot water wheels are those in which
The cavitation in a hydraulic machine is mainly due to
In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.
In an outward flow reaction turbine
Mechanical efficiency of a centrifugal pump is the ratio of
The hydraulic efficiency of a reaction turbine, is the ratio of
The overall efficiency for a Pelton wheel lies between
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))
The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base.
A turbine is required to developkW atr.p.m. under a head ofm. Which of the following turbine should be used ?
Which of the following pump is successfully used for lifting water from deep wells?
A hydraulic press is a device used
Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?
Braking jet in an impulse turbine is used
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