GATE Mining Engineering Practice Quiz

Question 1

In an open pit mine, the ultimate pit limit is being evaluated using a block model. For a particular ore block, the recovered metal value is ₹$4200$, mining cost is ₹$900$, processing cost is ₹$1400$, and selling/administrative cost is ₹$300$. If the block is mined as ore, its net block value is

Accepted Answer

₹$1600$

Question 2

A mine airway carries air at $Q=60\,\mathrm{m^3/s}$. The airway resistance is $R=0.015\,\mathrm{N\,s^2/m^8}$. The pressure drop across the airway is closest to

Accepted Answer

$54\,\mathrm{Pa}$

Question 3

In froth flotation of sulphide minerals, xanthates are commonly used as

Accepted Answer

Collectors

Question 4

A Bord and Pillar panel has square pillars of size $30\,\mathrm{m}\times 30\,\mathrm{m}$ and galleries of width $5\,\mathrm{m}$ on both sides in a regular grid. The percentage extraction during development is approximately

Accepted Answer

$30.6\%$

Question 5

A circular shaft of diameter $6\,\mathrm{m}$ is sunk to a depth of $300\,\mathrm{m}$. If the average rock density is $2.5\,\mathrm{t/m^3}$, the approximate mass of rock excavated is

Accepted Answer

$2.12\times 10^4\,\mathrm{t}$

GATE Mining Engineering

Practice Quizzes

GATE Mining Engineering Practice Quiz

Mine Surveying Corrections Fundamentals | GATE Mining Engineering