Hydraulic Machines Quiz | Hydraulic Machines Multiple Choice Questions and Answers

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Questions
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

Answer: 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

Answer: 4-8
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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

Answer: 80 to 200
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

Answer: 10 to 100
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

Answer: 0 to 4.5
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

Answer: Bent backward
8 For small discharge at high-pressure following pump is preferred .........
A Centrifugal
B Axial flow
C Mixed flow
D Reciprocating

Answer: 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

Answer: At the centre
10 Discharge of a centrifugal pump is proportional to .......
A Impeller diameter(D)
B D 2
C D 3
D 1/D 3

Answer: D 2
11 Power required to drive a centrifugal pump is proportional to ......
A Seed (N)
B N 2
C N 3
D N 4

Answer: N 3
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

Answer: Centrifugal pump
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

Answer: Mixed flow pump
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

Answer: Axial flow pump
15 Low specific speed of turbine implies it is .......
A Propeller turbine
B Francis turbine
C Impulse turbine
D Any of the above

Answer: Impulse turbine
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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