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MINING TUTORIAL, , PREPARATION FOR G.T, M.SCIL, O.MCILEX AMINATION (Set- —, , , , Gyan Darpan Public School, Naya Road, Phusro, Bokaro- 829144, Mob- 865 3750075, , TIME- 15 MINTS MARKS OBTAIN, , , , , , NAME1. No gallery in a seam or section shall exceed atleast............. din width in R/P mining method?, a3om, C) 6.25mC) caamO osam CC), 2. The sudden release of elastic strain energy stored in the pillars results violent burst of coal pillars Is called?, AAir Blast, ©) B.Bumps,) C.Rock Burst, C) D.Main Fall, C), 3. Which one Is most hazardous In B/P method working with stowing?, A. AirBlas.) —_B. Spontanous Heating_)C.Regular fall, ) Hof these, C), 4. Coal mine operations are prohibited from any Roadway or Railway?, aasm, B.120m, C) c.60m, 45, 5. What is the limiting gradient for LHO?, ars, O 8.16, 71,, 6. Maximum roof exposure for Stowing is?, , '. Goat is related with?, , |. During development the height of the, , , , , , , , A.30 to $0sq.m,(_) 8.60 to 90 sq mC), A.B/P Method, —() B. Long wall,, , A Disused working) B.Discontinue work,, , , , , , , , , , a2, O 8.3m, DAI of these, (), 10. The distance of green roof from ?, Ai2smO 809m, =O C.10 m, 003m, O, 11. The length of channel Pit prop is?, a1om, © 75m.) oasm, ©, in RMR is?, C15, O 0.30, oO, may be through?, C.Staple pit, oO D.Lower seam only, ), under section 12?, co, ©O p25, O, kness of the hard cover is less than when upper seam has fire?, Sm, O C10m, O) 0.20m,), jage rope is not less than, as, O cs, O 010, ©, of roof bolt is?, 815m, © c10m, O D. Decided by Rt, CO), 18. How much load in tonne shall be taken by prop?, a2O a3, O cs, O os, O, 19.Length of cogging member shall be not less than as per CMR?, a1sm © Bim, ©) c12mC) D2m, ©, , 20.1he thickness lid shall be not less than in cm?, , AOS O 815 O C10 oO 0.08 @