Opencast Mining - Study Mode
[#221] Tension crack of 5 m depth behind a rock slope crest is completely filled with water. Find the horizontal force exerted on a line of slope length by the water in tension crack.
Correct Answer
(A) 122.60 KN
[#222] Speed of crawler mounted machinery are . . . . . . . .
Correct Answer
(B) Slow
[#223] The ratio of weight per unit volume of rock mass in bench and weight per unit volume of loose rock mass after blasting called
Correct Answer
(D) Swell factor
[#224] How much time a drag line may take to complete a cycle for a single pass.
Correct Answer
(C) 1 min 45 sec
[#225] Type of drill rods employed for Jack hammer.
Correct Answer
(C) Hexagonal