Mine Supports and Strata Control MCQs Questions & Answers | Mining Engineering

A. 200 - 500 kgf/cm²

B. 300 - 600 kgf/cm²

C. 100 - 200 kgf/cm²

D. 800 - 1000 kgf/cm²

A. 35°

B. 30°

C. 25°

D. 20°

A. $$ \in T = \left( {2P} \right)L\left( {\pi dt} \right)$$

B. $$ \in T = \left( {2\pi P} \right)L\left( {d{t^2}} \right)$$

C. $$ \in T = \frac{{2PL}}{{DT}}$$

D. $$ \in T = \frac{{4P}}{{\pi dt}}$$

A. Churn drill

B. Rotory drill

C. Diamon drill

D. Tricone crock roller drill

A. Garder

B. Beam

C. Liver

D. Bolt

A. $${\frac{1}{3}^{{\text{rd}}}}$$ of the length

B. $${\frac{1}{6}^{{\text{th}}}}$$ of the length

C. $${\frac{1}{9}^{{\text{th}}}}$$ of the length

D. $${\frac{1}{{12}}^{{\text{th}}}}$$ of the length

A. Point loaded bolt

B. Distributed load bolt

C. Semi distributed loaded bolt

D. None

A. Face should not advance more than 2.4 m from last tensioned rope

B. Short ropes should be used in between long ropes

C. Rope should be tensioned while using good wooden sleepers

D. All of these

A. Withdrawl of support

B. Extension of support

C. Releasing pump for operation

D. All of these

A. L/W stowing

B. L/W caring

C. Harmonic mining

D. Bord and Pillar