21. If the mine car type is Drop bottom, the mode of unloading provided is . . . . . . . .
22. The ropes used for winding; haulage, coal cutting are the examples of . . . . . . . .
23. Pilot circuit voltage in coal drill . . . . . . . .
24. The number of plate consists in king detaching safety hook
25. In high speed runs of rope in direct rope haulage system causes . . . . . . . . of tubs.
26. Number of tracks and ropes, drums required for direct rope haulage . . . . . . . .
27. Tilting plat form consists of swinging rails covered with . . . . . . . .
28. Gathering arm loaders can be employed to work gradients upto . . . . . . . .
29. The fleet angle in Koepe winding is . . . . . . . .
30. The diameter of the groove of the head gear pulley should be . . . . . . . . of the rope diameter for stranded ropes.
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