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Hydraulic Machines
Hydraulic Machines Interview
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Q.1
Into how many types can you classify radial flow turbines?
a) 4
b) 3
c) 6
d) 2
Q.2
Maximum Number of jets, generally, employed in an impulse turbine without jet interference can be?
a) 2
b) 3
c) 4
d) 6
Q.3
The overall efficiency of a reaction turbine is the ratio of
a) Actual work available at the turbine to the energy imparted to the wheel
b) Work done on the wheel to the energy (or head of water) actually supplied to the turbine
c) Power produced by the turbine to the energy actually supplied by the turbine
d) Actual work available at the turbine to energy imparted to the wheel
Q.4
In a reaction turbine, the draft tube is used to _________
a) To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race
b) To prevent air to enter the turbine
c) To increase pressure energy of water
d) To transport water to downstream
Q.5
In reaction turbine hydraulic efficiency is______________
a) Ratio of actual work at the turbine to the energy imparted to the wheel
b) Ratio of work done on the wheel to energy that is supplied to the turbine
c) Ratio of power produced by the turbine to the energy actually supplied by the turbine
d) Ratio of Work done on the wheel to the energy (or head of water) actually supplied to the turbine
Q.6
Consider an inward flow reaction turbine, here, water _______
a) Flows parallel to the axis of the wheel
b) Enters the wheel at the outer periphery and then flows towards the centre of the wheel
c) Flow is partly radial and partly axial
d) Enters at the centre of the wheel and then flows towards the outer periphery of the wheel
Q.7
The working of which of the following hydraulic units is based on Pascal’s law?
a) Air lift pump
b) Hydraulic coupling
c) Hydraulic press
d) Jet pump
Q.8
Which kind of turbine is a Pelton Wheel turbine?
a) Tangential flow turbine
b) Radial flow turbine
c) Outward flow turbine
d) Inward flow turbine
Q.9
IN what type of turbine water enters in radial direction and leaves axial direction?
a) Tangential flow turbine
b) Axial flow turbine
c) Outward flow turbine
d) Mixed flow turbine
Q.10
How many types of turbines can you classify on the basis of direction of flow through runner?
a) 6
b) 3
c) 4
d) 7
Q.11
Into how many types can you classify turbines on basis of head at inlet?
a) 3
b) 4
c) 6
d) 5
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