Hydropower Engineering MCQ

41. The surge tank is provided to

1. supply more water whenever needed
2. increase velocity of flow in a pipe
3. remove impurities from water
4. provide safety against water hammer

42. The well yield per unit drawdown is known as

1. Specific capacity of a well
2. Efficiency of a well
3. Retention of a well
4. Well loss

43. Hydraulic Jump occurs when the flow changes from

1. super-critical to sub-critical
2. laminar to turbulent
3. sub-critical to super-critical
4. critical to turbulent

44. The horsepower transmitted through a pipe is maximum when the ratio of loss of head to friction and total head supplied is

1. 1/4
2. 1/3
3. 2/3
4. 1/2

45. The momentum correction factor “β” is used in account for

1. Change in direction flow
2. Change in total energy
3. Non-uniform distribution of velocities at inlet and outlet section
4. Change in mass rate flow

46. Which one of the following is the purpose of providing a surge tank in a pipeline carrying water?

1. To store water
2. To increase pressure throughout the pipeline
3. To store overflowing water
4. To protect the pipeline against water hammer

47. The main function of the surge tank is to

1. restrict the water hammer effects to small length of penstock
2. provide a free water surface near turbines
3. act as a reservoir
4. protect the penstock from bursting

48. What is the net amount of power, which is continuously available from a hydropower plant without any break on firm known as?

1. Power plant capacity
2. Water power
3. Power plant load
4. Firm power

49. Basic method to measure the flow rates in hydropower plants is

1. velocity integration method
2. Pitot-tube method
3. Pressure-time method
4. Notch method

50. A Surge tank is provided in a hydropower scheme to

1. Provide additional storage close to the penstock.
2. Take care of change of slope alignment or size of the water conductor system.
3. Reduce the pressure under transient conditions.
4. Provide convenient overspills.