Hydraulic Machines MCQ Questions with answers and solutions Page 24

Q. Mechanical efficiency of a centrifugal pump is the ratio of ?

(A) energy available at the impeller to the energy supplied to the pump by the prime mover
(B) actual work done by the pump to the energy supplied to the pump by the prime mover
(C) energy supplied to the pump to the energy available at the impeller
(D) manometric head to the energy supplied by the impeller per kN of water

💬 Discuss

✅ Correct Answer: (A) energy available at the impeller to the energy supplied to the pump by the prime mover

Published by Admin ⭐ 38.37K Points at 20-Jun-2020 02:23 am in Hydraulic Machines

Q. The cavitation in reaction turbines is avoided, to a great extent by ?

(A) installing the turbine below the tail race level
(B) using stainless steel runner of the turbine
(C) providing highly polished blades to the runner
(D) all of the above

💬 Discuss

✅ Correct Answer: (D) all of the above

Published by Vijay Sangwan ⭐ 28.62K Points at 30-May-2023 11:44 pm in Hydraulic Machines

Q. A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is ?

(A) 0.26
(B) 0.36
(C) 0.46
(D) 0.56

💬 Discuss

✅ Correct Answer: (C) 0.46

Published by Shiva Ram ⭐ 30.44K Points at 31-Aug-2022 01:11 pm in Hydraulic Machines

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