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Mechanical Engineering Objective Questions { Hydraulic Machines }



92. 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

93. In Francis turbine runner, the number of blades is generally of the order of
A.2-4
B.4-8
C.8-16
D.16-24

94. A draft tube is used with
A.Impulse turbine
B.Pelton wheel turbine
C.Reaction turbines
D.Very high specific speed turbines

95. For a given head the discharge through a pelton turbine with increase in speed
A.Increases
B.Decreases
C.Remains unaffected
D.Depends upon specific speed only

96. According to the laws of proportionality for homologous turbine, Power is proportional to (when D= diameter, H= head)
A.DxH
B.D^2 x H
C.D^2 x H^(3/2)
D.D^2 x ?H

97. According to the laws of proportionality for homologous turbine, Speed is proportional to (when D= diameter, H= head)
A.?H/D
B.?(H/D)
C.?H/D^2
D.?(HD)

98. According to the laws of proportionality for homologous turbine, Discharge is proportional to (when D= diameter, H= head)
A.D?H
B.D^2 VH
C.D^2 x H^(3/2)
D.D^2 x H

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