81. The rate of flow and total head at which the pump efficiency is maximum at a given speed and impeller diameter . . . . . . . .
82. Wear on the rope and wear of the pulley results of . . . . . . . . angle is move.
83. Steel regid guides used for shafts are available to a length of upto . . . . . . . .
84. The pump casing for a centrifugal type of pump, typically spiral or circular in shape . . . . . . . .
85. Fleet angle should not exceed.
86. Coal drill bit is . . . . . . . . type.
87. AM 50 continuous miners negotiates inclination upto . . . . . . . .
88. Length of lashing chain usually . . . . . . . . m long.
89. A double stage reduction . . . . . . . . box helps to utilize the drill in coal or stone of various hardness.
90. The speed of the machine of Auger type drill model 625 . . . . . . . .
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