76. If discharge of a pump is 0.16 cumecs, the economic diameter of pipe, is
77. Hard water for public water supply is discarded because
78. Pick up the correct statement from the following regarding radial flow centrifugal pumps :
79. Quality of water is said to be good if it is
80. The main draw-back of centrifugal pump, is
81. The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is
82. Rapid gravity filter can only remove turbidity of water upto
83. The best process of disinfection of public water supply, is by
84. A water channel supported above the ground over trestles, is generally called
85. The central most space of tooth contains?
86. One degree of hardness of water means a content of salts of
87. Mostly used coagulant, is
88. If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is
89. The most commonly used chemical for dechlorination of water, is
90. The prescribed hardness limit of potable water ranges between
91. For centrifugal pumps
92. The cast iron pipes for water supply system are used for
93. For plain chlorination of water, the quantity of chlorine used, is
94. For estimating the run off of catchments, the mean value of the constant 'K' in the Khosla's formula Qy = Py - K (1.8 Ty + 32) is
95. Service connections to consumers houses, are generally provided with
96. Sluice valves are fitted in a distribution system
97. The maximum permitted loss of head in a rapid sand filter, is
98. Mud balls may be removed by
99. For maximum alkalinity of water, pH value should be
100. The fire demand for a city of 50, 000 population, according to Godrich formula, is