71. Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between
A.Lift and resultant force
B.Drag and resultant force
C.Lift and tangential force
D.Lift and drag

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72. Francis turbine is best suited for
A.Medium head application from 24 to 180 m
B.Low head installation upto 30 m
C.High head installation above 180 m
D.All types of heads

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73. Propeller turbine is best suited for
A.Medium head application from 20 to 180 m
B.Low head installation upto 30 m
C.High head installation above 180 m
D.All types of heads

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74. Specific speed for impulse wheels ranges from
A.0 to 4.5
B.10 to 100
C.80 to 200
D.250 to 300

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75. The ratio of power produced by the turbine to the energy actually supplied by the turbine is called
A.Mechanical efficiency
B.Hydraulic efficiency
C.Overall efficiency
D.Turbine efficiency

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76. The ratio of actual work available at the turbine to energy imparted to the wheel is called
A.Mechanical efficiency
B.Hydraulic efficiency
C.Overall efficiency
D.Turbine efficiency

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77. The ratio of the work done on the wheel to the energy (or head of water) actually supplied to the turbine is called
A.Mechanical efficiency
B.Hydraulic efficiency
C.Overall efficiency
D.Turbine efficiency

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