ηh = ηo x ηm
ηm = ηo x ηh
ηo = ηh x ηm
none of these
✅ The correct answer is option C.
Hydraulic Machines MCQs
The undershot water wheels are those in which
the wheel runs entirely by the weight of water
the wheel runs entirely by the impulse of water
the wheel runs partly by the weight of water and partly by the impulse of water
none of the above
✅ The correct answer is option B.
The specific speed of a turbine is given by the equation
✅ The correct answer is option C.
If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have
geometric similarity
kinematic similarity
dynamic similarity
none of these
✅ The correct answer is option A.
Head developed by a centrifugal pump is
proportional to diameter of impeller
proportional to speed of impeller
proportional to diameter and speed of impeller
none of the above
✅ The correct answer is option C.
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))
✅ The correct answer is option C.
The function of guide vanes in a reaction turbine is to
allow the water to enter the runner without shock
allow the water to flow over them, without forming eddies
allow the required quantity of water to enter the turbine
all of the above
✅ The correct answer is option D.
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
one-half
one-third
two-third
three-fourth
✅ The correct answer is option B.
A Francis turbine is an outward flow reaction turbine.
TRUE
FALSE
✅ The correct answer is option B.