Introduction To Mining Engineering - Study Mode
[#186] The following data are provided for a surface mine to be excavated by a shovel: Production target : 10000 te/shift Available hours per shift : 6 hrs Shovel loading cycles per hour : 10 6 Bank density of the material mined : 2400 kg/m 3 Swing factor at 120° swing : 0.91 Bucket fill factor : 0.64 Utilization of available time : 83% No of working days in a year : 300 No of shifts per day : 3 The annual production target in Mte is
Correct Answer
(D) 9.00
[#187] Select the correct order with respect to the core sizes
Correct Answer
(B) NX > BX > AX > EX
Explanation
Solution: The correct answer is Option B: NX > BX > AX > EX . Here's why: These codes (NX, BX, AX, EX) refer to standard core sizes used in core drilling during mineral exploration and geotechnical investigations. They represent the diameter of the rock core retrieved from the drill hole. The letters are in a roughly descending order of size. * NX core is the largest of the given options. * BX core is smaller than NX. * AX core is smaller than BX. * EX core is the smallest of the given options. Therefore, the correct order from largest to smallest core size is NX > BX > AX > EX.
[#188] A non-electric detonating relay does not contain
Correct Answer
(C) Metal sleeve
[#189] Which of the following sampling technique is followed during sampling from wagons or dumps in the form of scoop taken at regular intervals?
Correct Answer
(D) grab sampling
[#190] Value of Bulking Factor is
Correct Answer
(D) More than 1