91. Which of the following is not a selection criteria of choice of type and size of mine car in a mine.
92. For drilling in stone coal drill some times used by changing the gear box to reduced the speed of bit to nearly . . . . . . . . rpm and . . . . . . . . type drill rods used.
93. Oremerod detaching safety hook plates made of . . . . . . . .
94. The system of haulage suitable for . . . . . . . . roadways, which it is impossible to maintain double track.
95. The opening of the detaching plate or bell is tested . . . . . . . . by caliper for wear occuring from lashing by rope.
96. The jaws of the small man clip length is about . . . . . . . . cm.
97. Direct rope haulage system disadvantage is . . . . . . . .
98. Mechanical loaders commonly used are . . . . . . . .
99. Total power of all installed motors in AM 50 . . . . . . . . kw . . . . . . . . V.
100. Cutter, loader continuous machine give a progress of . . . . . . . . m/day.
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