Related Questions

Which of the following statements is/are correct?
1. The major constituent mineral of granite rock is quartz.
2. The major constituent mineral of sandstone rock is feldspar.
3. The major constituent mineral of limestone rock is dolomite.
Select the correct answer using the code given below
Assertion A: When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock.
Reason R: A tunnel through rock, hard or soft, does not need any concrete lining
Select your answer
Rock mass parameters for a shale rock, mb, s, and a of the Hoek and Brown failure criterion as given in the equation are 2.4, 0.01 and 0.52 respectively. The uni-axial compressive strength (σCi) of intact sh!le is 50 MPa.
$${\sigma _1} = {\sigma _3} + {\sigma _{ci}}{\left( {{m_b}\frac{{{\sigma _3}}}{{{\sigma _{ci}}}} + S} \right)^a}$$
The global rock mass strength of shale in MPa is
From the stress-strain diagram shown below, the tangent and the secant moduli of elasticity in GPa are
Rock Mechanics and Roof Supporting mcq question image
During uniaxial compressive testing of a rock specimen of diameter 54 mm and length 120 mm, the axial strain was found to be 6.5 × 10-4 mm/mm. If the Poisson's ratio of the rock is 0.3, the volumetric strain of the rock specimen in mm/mm is
Sandstone is a
(i) Sedimentary rock
(ii) Aqueous rock
(iii) Siliceous rock
The hardest rock is
Igneous rocks are formed from molten rock material. Which one of the following is not an igneous rock?
Consider the following statements regarding chasmophytes and choose the correct answer:
1. Chasmophytes are plants rooted in fissures or clefts and crevices of rocks which are filled with earth, dust and other gravel or rock-debris
2. Chasmophytic flora consists of all types, they belong to Thallophyta, Bryophyta, Pteridophyta and Spermatophyta
3. Rhizoids and roots of chasmophytes are often constricted within narrow clefts and flattened out as thin filamentous structures
4. If the rock is provided with clefts and crevices, lithophytes along chasmophytes develop in these
The following characteristic curves (P, Q, R, S) pertain to rotary drilling in rock.
Mining Machinery mcq question image
Title of the curve
I : Torque versus RPM
II: Rate of penetration versus uniaxial compressive strength of rock
III : Rate of penetration versus weight on bit
IV : Specific energy versus weight on bit
Match the curves with their titles