1) Which of the following is an example of impulse turbine?
a. Propeller turbine
b. Francis turbine
c. Kaplan turbine
d. Pelton wheel
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Answer
Explanation
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ANSWER: Pelton wheel
Explanation:
No explanation is available for this question!
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2) The runner of __________ turbine always be under pressure of above atmospheric
a. Turgo
b. Girand
c. Kaplan
d. None of the above
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Answer
Explanation
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ANSWER: Kaplan
Explanation:
No explanation is available for this question!
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3) Gross head is the difference between __________.
a. head race and tail race
b. head race and net head
c. head race and friction losses
d. net head and friction losses
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Answer
Explanation
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ANSWER: head race and tail race
Explanation:
No explanation is available for this question!
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4) In which turbine the pressure energy of water is first converted into kinetic energy by means of nozzle kept close to the runner?
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: Impulse turbine
Explanation:
No explanation is available for this question!
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5) The pressure of water is atmospheric and remains constant while passing over the runner in __________ .
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: Impulse turbine
Explanation:
No explanation is available for this question!
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6) The energy of water entering the reaction turbine is _______
a. fully the kinetic energy
b. fully the pressure energy
c. partly the pressure energy and partly the kinetic energy
d. unpredictable
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Answer
Explanation
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ANSWER: partly the pressure energy and partly the kinetic energy
Explanation:
No explanation is available for this question!
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7) What is the head of water available at turbine inlet in hydro-electric power plant called?
a. head race
b. tail race
c. gross head
d. net head
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Answer
Explanation
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ANSWER: net head
Explanation:
No explanation is available for this question!
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8) Which of the following hydraulic turbines has a construction given in diagram below?
a. Kaplan turbine
b. Francis turbine
c. Pelton turbine
d. Propeller turbine
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Answer
Explanation
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ANSWER: Pelton turbine
Explanation:
No explanation is available for this question!
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9) What is runaway speed of the runner of Pelton wheel?
a. maximum unsafe speed of the runner due to sudden increase in load on turbine
b. minimum safe speed of the runner due to sudden increase in load on turbine
c. maximum unsafe speed of the runner due to sudden decrease in load on turbine
d. minimum safe speed of the runner due to sudden decrease in load on turbine
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Answer
Explanation
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ANSWER: maximum unsafe speed of the runner due to sudden decrease in load on turbine
Explanation:
No explanation is available for this question!
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10) What is the formula for the velocity of water jet at the inlet of turbine?
Where,
H = Net head acting on Pelton wheel
Cv = coefficient of velocity of jet
a. V = C v √ gH
b. V = 2 C v √ gH
c. V = C v √ 2gH
d. V = 2 C v g √ H
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Answer
Explanation
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ANSWER: V = Cv √2gH
Explanation:
No explanation is available for this question!
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