51. Dynamic similarity is said to exist between the model and the prototype, if both of them
52. Fear of water?
53. A draft tube is used with impulse turbines.
54. A hydraulic ram is a device used to
55. Overall efficiency of a centrifugal pump is the ratio of
56. In an inward flow reaction turbine
57. The working of which of the following hydraulic units is based on Pascal's law?
58. The hydraulic efficiency of a reaction turbine, is the ratio of
59. In order to avoid cavitation in centrifugal pumps
60. A hydraulic intensifier is a device used to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure.
61. The discharge through a reaction turbine __________ with the increase in unit speed.
62. In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.
63. A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.
64. Which of the following pump is generally used to pump highly viscous fluid?
65. The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.
66. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is
67. In a reciprocating pump, air vessels are used to
68. In a Francis turbine, the pressure at inlet is __________ that at outlet.
69. If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
70. A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
71. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is
72. If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.
73. The number of Islands in Lakshadweep?
74. In a Francis turbine runner, the number of blades are generally between
75. The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) ) is