Drilling and Blasting MCQs Questions & Answers | Mining Engineering

A. Efficiency-capacity characteristics

B. Head-capacity characteristics

C. Hydraulic losses-mechanical losses characteristics

D. Power-capacity fan characteristics

A. Brattice cloth

B. Surface air lock

C. Door

D. Air crossing

A. Shattering

B. Heaving

C. Burning

D. Grain to strom

A. Very costly

B. Occupies whole cross section of heading

C. Exposes workers to high concentrations of dust

D. Unable to cope up with the rate of advance of continuous miner

A. Decreases

B. Increases

C. Some times increases and some times decreases

D. Constant

A. 5° - 10°

B. 10° - 15°

C. 15° - 20°

D. 20° - 30°

A. Antitropal

B. Homotropal

C. Longwall

D. All of these

A. Position and type of barrier

B. Frequency of barrier

C. Rate of advance of barrier

D. Serial Number of barrier

E. All of above

A. 1.2 m

B. 1.8 m

C. 2.5 m

D. 4 m

A. has at least 3 doors

B. has atleast one door that has provision for latching

C. all doors are principle designed open toward high pressure side of air

D. prevent short circuiting of air when the flow is reversed in coal mines