Underground coal mining related most important mcq's PART-1 (for all mining exams FMC SMC OM MS )

underground coal mining related most important mcq's for all mining exams
DGMS EXAMS- FMC, SMC ,OVERMAN MINING SIRDAR
CIL MT AND ALL SUBSIDIARIES EXAMS - OVERMAN AND SIRDAR ( SECL, CCL, WCL, MCL , NCL , BCCL , ECL AND SCCL)