Hydropower Engineering MCQ

21. A Pipe of gradually increasing area which is used for discharging water from the exit of Turbine to Tail race is called

  1. Suction Pipe
  2. Penstock
  3. Both a and b
  4. Draft tube
Answer
Answer. d

22. The performance of a hydraulic structure during a flood has been investigated in a 1/36 model based on Froude law of similarity. A flood wave passing through the model in 3 hours corresponds to the prototype period of

  1. 9 hours
  2. 3 hours
  3. 36 hours
  4. 18 hours
Answer
Answer. d

23. A plot between rainfall intensity versus time is called

  1. Isohyet
  2. Mass curve
  3. Hyetograph
  4. Hydrograph
Answer
Answer. c

24. A penstock is 3000 meters long. Pressure wave travels in it with a velocity of 1500 m/s. If the turbine gates closed uniformly and completely in a period of 4.5 seconds, then it is called

  1. slow closure
  2. rapid closure
  3. uniform closure
  4. sudden closure
Answer
Answer. a

25. A Euler number is related to

  1. Inertia force and pressure force
  2. Inertia force and elastic force
  3. Inertia force and viscous force
  4. Inertia force and gravity force
Answer
Answer. a

26. The correct sequence, in the direction of the flow of water for installation of a hydropower plant is

  1. Reservoir, surge tank, turbine, penstock
  2. Reservoir, surge tank, penstock, turbine
  3. Reservoir, penstock, turbine, surge tank
  4. Reservoir, penstock, surge tank, turbine
Answer
Answer. d

27. An earth-retaining structure be subjected to the following lateral earth pressures:

  1. Earth pressure of rest
  2. Passive earth pressure
  3. Active earth pressure

The correct sequence of the increasing order of the magnitudes of these pressure is

  1. iii, ii, i
  2. i, iii, ii
  3. i, ii, iii
  4. iii, i, ii
Answer
Answer. d

28. Which of the following hydraulic units is used for transmitting increased or decreased torque to the driven shaft?

  1. Hydraulic ram
  2. Hydraulic intensifier
  3. Hydraulic torque converter
  4. Hydraulic accumulator
Answer
Answer. c

29. Which of the following is not a requirement for site selection of hydroelectric power plant?

  1. Availability of water
  2. Large catchment area
  3. Rocky land
  4. Sedimentation
Answer
Answer. d

30. Hydroelectric power plant is

  1. non-renewable source of energy
  2. conventional source of energy
  3. non-conventional source of energy
  4. continuous source of energy
Answer
Answer. b
Pages: 1 2 3 4