1. Which support gives greater head room clearnace in road ways.
2. The smallest absolute value of a parameter that can be measured by a monitoring instrument.
3. Most of the Indian coal deposits occurs as
4. Detection of any cracks in roof or sides or signs of weight on supports comes under
5. The support used in sound roof with minimum lateral roof movement is
6. The timber prop is strongest when load acts
7. Roof in Giridih coal field consists of
8. In case of tapered prop, by increasing roof pressure the tapered end burrs and shows . . . . . . . .
9. The percentage of water content used in hydraulic prop.
10. Which roof gives rarely warning before collapse
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