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Mechanical Engineering - Hydraulic Machines

Exercise : Hydraulic Machines - Section 2
21.
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is
39.2%
48.8%
84.8%
88.4%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
In a reciprocating pump, air vessels are used to
smoothen the flow
reduce suction head
increase delivery head
reduce acceleration head
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In a Francis turbine, the pressure at inlet is __________ that at outlet.
less than
more than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
geometric similarity
kinematic similarity
dynamic similarity
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
0.26
0.36
0, 46
0.56
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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