Hydraulic Machines Mcqs
This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Hydraulic Machines ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Hydraulic Machines comprehensively.
2. When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?
Horizontal
Nearly horizontal
Steep
First rise and then fall
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3. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?
Same quantity of liquid
0.75 Q
Q/0.75
1.5 Q
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4. The optimum value of vane exit angle for a centrifugal pump impeller is_________________?
10-15°
20-25°
30-40°
50-60°
5. In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?
Straight
Bent forward
Bent backward
Radial
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6. In a centrifugal pump, the liquid enters the pump__________________?
At the top
At the bottom
At the center
From sides
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7. Low specific speed of a pump implies it is____________________?
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
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8. For small discharge at high pressure, following pump is preferred_____________________?
Centrifugal
Axial flow
Mixed flow
Propeller
Reciprocating
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9. The horse power required in above case will be___________________?
Same
0.75 B.H.P.
B.H.P./0.75
1.5 B.H.P.
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10. Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?
Rotational flow
Radial
Forced spiral vortex flow
Forced cylindrical vortex flow
Spiral vortex flow
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11. Medium specific speed of a pump implies it is_________________?
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
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12. Indicator diagram of a reciprocating pump is a graph between________________?
Flow vs swept volume
Pressure in cylinder vs swept volume
Flow vs speed
Pressure vs speed
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13. Any change in load is adjusted by adjusting following parameter on turbine______________?
Net head
Absolute velocity
Blade velocity
Flow
14. The maximum number of jets generally employed in impulse turbine without jet interference is________________?
4
6
8
12
15. High specific speed of turbine implies it is__________________?
Propeller turbine
Francis turbine
Impulse turbine
Any one of the above
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