Drilling and Blasting MCQs Questions & Answers | Mining Engineering

A. Clearing roof fall which is not obstructed by normal air supply

B. Long headings thus constitutes dead ends

C. Narrow roadways in junctions

D. None

A. Incline

B. Adit

C. Decline

D. Shaft

A. 0.9 kg

B. 0.5 kg

C. 1 kg

D. 1.2 kg

A. Use of shaft full capacity

B. Use of minimum number of tubs in circuit

C. Minimum number of operatives

D. Maintaining steady flow tubs

E. All of above

A. correct type of explosive

B. correct amount of charge per hole

C. type of exploder

D. proper stemming

A. No

B. Yes

C. Some times No/Yes

D. None

A. 4.2 - 6.7 m

B. 3 - 6 m

C. 2 - 8 m

D. 10 - 12 m

A. Dip

B. Rise

C. Middle

D. $$\frac{1}{3}$$ from dip

A. the colours of lead wires

B. base charge

C. priming charge

D. neoprene plug

A. $${R_1} - {R_2} - {R_3}.\,.\,.\,.\,.\,{R_n}$$

B. $${R_1} + {R_2} + {R_3}.\,.\,.\,.\,.\,{R_n}$$

C. $$\frac{1}{{{R_1}}} + \frac{1}{{{R_2}}} + \frac{1}{{{R_3}}}.\,.\,.\,.\,.\,\frac{1}{{{R_n}}}$$

D. $$\frac{1}{{\sqrt {{R_1}} }} + \frac{1}{{\sqrt {{R_2}} }} + \frac{1}{{\sqrt {{R_3}} }}.\,.\,.\,.\,.\,\frac{1}{{\sqrt {{R_n}} }}$$