Questions and answers for exam Preparation

MCQs

Total Questions : 108 | Page 2 of 11 pages

Question 11. An analysis of augite yields 3 silicon atoms calculated on the basis of 12 oxygen atoms. If only Al
replaces Si, calculate the number of tetrahedral-Al in the mineral.

Discuss Question

Answer: Option A. -> 1

-NA-

Question 12. Determine the correctness or otherwise of the following Assertion [a] and Reason [r]. Assertion: Biaxial minerals can be pleochroic in three shades. Reason: Biaxial minerals have three refractive indices.

Both [a] and [r] are true and [r] is the correct reason for [a]
[a] is true but [r] is false
[a] is false but [r] is true
Both [a] and [r] are true but [r] is not the correct reason for [a]

Discuss Question

Answer: Option A. -> Both [a] and [r] are true and [r] is the correct reason for [a]

-NA-

Question 13. In which of the following crystal systems, the characteristic symmetry elements "a two-fold axis of
rotation and at least two planes of symmetry are possible?

Tetragonal
Hexagonal
Orthorhombic
Monoclinic

Discuss Question

Answer: Option C. -> Orthorhombic

-NA-

Question 14. Calculate the degree(s) of freedom of the assemblage orthopyroxene + clinopyroxene + plagioclase
+ hornblende + quartz + fluid in the chemical system CaO“FeO“MgO“Al2O3“SiO2“H2O with
pressure and temperature as physical variables.

Discuss Question

Answer: Option C. -> 2

-NA-

Question 15. Ca-montmorillonite is formed by the chemical weathering of

calcite
augite
orthoclase
forsterite

Discuss Question

Answer: Option B. -> augite

-NA-

Question 16. Match the items in Group I with those in Group II.Group I Group IIP. Churching 1. Concrete gravity damQ. Curtain grouting 2. TunnellingR. Piping 3. CementS. Pozzolan 4. Earth dam

P-2, Q-1, R-4, S-3
P-4, Q-1, R-2, S-3
P-2, Q-3, R-1, S-4
P-1, Q-2, R-3, S-4

Discuss Question

Answer: Option A. -> P-2, Q-1, R-4, S-3

-NA-

Question 17. A horizontally bedded sandstone outcrop exhibits planar cross-beds at a number of places. The dip
directions of the foresets of cross-beds at these locations are: N350°, N17°, N355°, N355°, N15°, N360°, N350°, N13°, N350°, N355°.
Find the mean palaeocurrent direction.

N15°
N350°
N355°
N360°

Discuss Question

Answer: Option D. -> N360°

-NA-

Question 18. Sedimentary structures are useful for determining the younging direction of a bed.Which sedimentary process is responsible for the generation of the structure identified above?

Wave reworking
Liquefaction of sediments
Drying and desiccation
Erosion of cohesive substrate

Discuss Question

Answer: Option B. -> Liquefaction of sediments

-NA-

Question 19. The professor ordered to the students to go out of the class. I II III IVWhich of the above underlined parts of the sentence is grammatically incorrect?

Discuss Question

Answer: Option B. -> II

-NA-

Question 20. Which of the following options is the closest in meaning to the word given below: Primeval