41. A Francis turbine is an outward flow reaction turbine.
TRUE
FALSE
✅ The correct answer is option B.
Hydraulic Machines MCQs
43. 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.
45. 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.
46. 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.
47. 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.
48. The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) ) is
ηh = ηo x ηm
ηm = ηo x ηh
ηo = ηh x ηm
none of these
✅ The correct answer is option C.
49. Which of the following pump is sucessfully used for lifting water to the boilers?
Centrifugal pump
Reciprocating pump
Jet pump
Air-lift pump
✅ The correct answer is option C.
50. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?
Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator
✅ The correct answer is option C.