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Free download in PDF Hydraulic Machines Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
In Kaplan turbine runner,the number of blades is generally of the order......
[A]
2-4
[B]
4-8
[C]
8-16
[D]
16-24
(2)
In Kaplan turbine runner,the number of blades is generally of the order ......
[A]
2-4
[B]
4-8
[C]
8-16
[D]
16-24
(3)
Specific speed for axial flow turbines ranges from .........
[A]
0 to 4.5
[B]
10 to 100
[C]
80 to 200
[D]
250 to 300
(4)
Specific speed for reaction turbines ranges from .......
[A]
0 to 4.5
[B]
10 to 100
[C]
80 to 200
[D]
250 to 300
(5)
Specific speed for impulse wheels ranges from .......
[A]
0 to 4.5
[B]
10 to 100
[C]
80 to 200
[D]
250 to 300
(6)
Indicator diagram of a reciprocating pump is a graph between......
[A]
Floor vs swept volume
[B]
Pressure in cylinder vs swept volume
[C]
Flow vs speed
[D]
Pressure vs speed
Answer: Pressure in cylinder vs swept volume
(7)
In a centrifugal pumps maximum efficiency is obtained when the plates are ......
[A]
straight
[B]
Bent forward
[C]
Bent backward
[D]
Radial
(8)
For small discharge at high-pressure following pump is preferred .........
[A]
Centrifugal
[B]
Axial flow
[C]
Mixed flow
[D]
Reciprocating
(9)
In a centrifugal pump the liquid enters the pump .......
[A]
At the top
[B]
At the bottom
[C]
At the centre
[D]
From sides
(10)
Discharge of a centrifugal pump is proportional to .......
[A]
Impeller diameter(D)
[B]
D 2
[C]
D 3
[D]
1/D 3
(11)
Power required to drive a centrifugal pump is proportional to ......
[A]
Seed (N)
[B]
N 2
[C]
N 3
[D]
N 4
(12)
Low specific speed of a pump implies it is ......
[A]
Centrifugal pump
[B]
Mixed flow pump
[C]
Axial flow pump
[D]
Any of the above
(13)
Medium specific speed of a pump implies it is .........
[A]
Centrifugal pump
[B]
Mixed flow pump
[C]
Axial flow pump
[D]
Any of the above
(14)
High specific speed of a pump implies it is .......
[A]
Centrifugal pump
[B]
Mixed flow pump
[C]
Axial flow pump
[D]
Any of the above
(15)
Low specific speed of turbine implies it is .......
[A]
Propeller turbine
[B]
Francis turbine
[C]
Impulse turbine
[D]
Any of the above
(16)
Cavitation can take place in case of ......
[A]
Pelton wheel
[B]
Francis turbine
[C]
Reciprocating pump
[D]
Both Francis turbine and reciprocating pump
Answer: Both Francis turbine and reciprocating pump
(17)
Total energy line (T.E.L.) represents the sum of ......
[A]
Pressure head and kinetic head
[B]
Kinetic head and datum head
[C]
Pressure head and datum head
[D]
Pressure head,kinetic head and datum head
Answer: Pressure head,kinetic head and datum head
(18)
Hydraulic gradient line (H.G.L.) represents the sum of .........
[A]
Pressure head and kinetic head
[B]
Kinetic head and datum head
[C]
Pressure head and datum head
[D]
Pressure head,kinetic head and datum head
Answer: Pressure head,kinetic head and datum head
(19)
Hydraulic intensifier is a device used for.......
[A]
Storing energy of a fluid in the form of pressure energy
[B]
Increasing pressure intensity of a fluid
[C]
Transmitting the power from one shaft to another
[D]
None of the above
Answer: Increasing pressure intensity of a fluid
(20)
Hydraulic accumulator is a device used for .......
[A]
Lifting heavy weights
[B]
Storing the energy of the fluid in the form of pressure energy
[C]
Increasing the pressure intensity of a fluid
[D]
None of the above
Answer: Storing the energy of the fluid in the form of pressure energy
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