61. 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
1-Feb
1-Feb
1
2
✅ The correct answer is option B.
Hydraulic Machines MCQs
62. The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base.
Agree
Disagree
✅ The correct answer is option A.
63. A Pelton wheel is
tangential flow impulse turbine
inward flow impulse turbine
outward flow impulse turbine
inward flow reaction t
✅ The correct answer is option A.
64. A Kaplan turbine is preferred for a specific speed of 300 to 1000 r.p.m.
Yes
No
✅ The correct answer is option A.
65. In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.
Correct
Incorrect
✅ The correct answer is option A.
66. Which of the following pump is suitable for small discharge and high heads?
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
✅ The correct answer is option D.
68. Manometric head is the actual head of water against which a centrifugal pump has to work.
Correct
Incorrect
✅ The correct answer is option A.
69. Delivery head of a centrifugal pump is
directly proportional to N
inversely proportional to N
directly proportional to N2
inversely proportional
✅ The correct answer is option C.
70. In order to avoid cavitation in centrifugal pumps
the suction pressure should be high
the delivery pressure should be high
the suction pressure should be low
the delivery pressure
✅ The correct answer is option A.