1) Generally, the value of specific speed of Kaplan turbine is _____________ that of the Pelton turbine.
a. lower than
b. higher than
c. same as
d. unpredictable
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Answer
Explanation
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ANSWER: higher than
Explanation:
No explanation is available for this question!
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2) The water from runner in reaction turbine is discharged into tail race through a draft tube which has ____________ cross sectional area.
a. constant
b. gradually decreasing
c. gradually increasing
d. uneven
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Answer
Explanation
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ANSWER: gradually increasing
Explanation:
No explanation is available for this question!
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3) __________ turbines are also called as parallel flow turbine.
a. Radial flow
b. Axial flow
c. Both radial flow and axial flow
d. None of the above
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Answer
Explanation
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ANSWER: Axial flow
Explanation:
No explanation is available for this question!
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4) In which type of reaction turbine does the water flow in radial direction at the outer periphery of runner and leave at the centre in the direction parallel to the axis of rotation of runner?
a. Radial flow turbine
b. Axial flow turbine
c. Mixed flow turbine
d. All of the above
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Answer
Explanation
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ANSWER: Mixed flow turbine
Explanation:
No explanation is available for this question!
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5) What is the formula to calculate specific speed (Ns) of a turbine rotating at a speed of 'N' rpm that develops the power of 'P' kW at the heat of 'H' m?
a. (N s) = (√ N x P) x (H) (5/4)
b. (N s) = (2 √ N x P) x (H) (5/4)
c. (N s) = (N √ P) x (H) (5/4)
d. (N s) = (2N √ P) x (H) (5/4)
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Answer
Explanation
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ANSWER: (Ns) = (N √P) x (H)(5/4)
Explanation:
No explanation is available for this question!
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6) The gates of aerofoil section in between the outer and inner ring of guide wheel are called as ________.
a. guide gates
b. guide vanes
c. scrolling gates
d. scrolling vanes
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Answer
Explanation
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ANSWER: guide vanes
Explanation:
No explanation is available for this question!
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7) Which of the following components of reaction turbine increases the head on the turbine by an amount equal to the height of runner outlet above the tail race?
a. Scroll casing
b. Guide vanes
c. Moving vanes
d. Draft tube
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Answer
Explanation
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ANSWER: Draft tube
Explanation:
No explanation is available for this question!
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8) As the reaction turbine works on the principle of impulse and reaction, it follows the law of ________.
a. impulse momentum
b. angular momentum
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: angular momentum
Explanation:
No explanation is available for this question!
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9) In which type of turbine, the runner needs to be run full of water?
a. Impulse turbine
b. Reaction turbine
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Reaction turbine
Explanation:
No explanation is available for this question!
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10) In reaction turbine work is done_______________.
a. totally due to change in kinetic energy of jet
b. totally due to change in pressure head
c. mostly due to change in pressure head and small amount of work is due to change in kinetic energy
d. mostly due to change in kinetic energy and small amount of work is due to change in pressure head
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Answer
Explanation
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ANSWER: mostly due to change in pressure head and small amount of work is due to change in kinetic energy
Explanation:
No explanation is available for this question!
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