Skip to main content

Posts

Showing posts with the label Mining - Numerical Problems

Mine Ventilation - Questions from DGMS, GATE and PSU Exams

An Air Sample taken from old waterlogged workings showed the following composition. CO 2 -3.0 percent, O 2 - 16.2 percent, N 2 - 79.5 percent, CH 4 - 1.3 percent. (The composition of normal air by volume is O 2 - 20.93 percent, N 2 - 79.04 percent & CO 2 - 0.03 percent). Find the Black damp content of the sample. (DGMS FCMC 2021)
Post a Comment
Read more

Mining Machinery - Questions from DGMS, GATE and PSU Exams

135 ton of coal is to be hauled by direct rope haulage in a shift of 6 hours hauling time where the length of haul is 1100 m. The average speed of rope is 6 km/hr. Set changing time is 1 min & tub capacity is 1.5 ton. Calculate the number of tubs per set?
Post a Comment
Read more

Mine Surveying - Numerical Problems from DGMS, GATE and PSU Exams

A 20 m chain was found to be 10 cm too long after chaining a distance of 2000 m. It was found to be 18 cm too long at the end of the day’s work after chaining a total distance of 4000 m. What is the true distance if the chain was correct before the commencement of the day’s work?
Post a Comment
Read more