Introduction To Mining Engineering - Study Mode

[#286] What will be the overall slope of the benches shown in the figure?
Correct Answer

(C) 20.45°

[#287] In gassy mine being worked by soutirage method which of the following method of blasting is preferred?
Correct Answer

(C) camouflage blasting

[#288] The rotational speed and cutting velocity of a drill are 350 rpm and 71.50 m/min respectively. The diameter of the rotary drill bit in mm is
Correct Answer

(A) 65

[#289] Rocks are 'massive' when bedding planes are more than "A"m apart. A is given by
Correct Answer

(D) more than 1.2 m

[#290] 'Run away switch' is used in connection with
Correct Answer

(A) direct rope Haulage