IIT JAM Previous Year Geology Question Paper
IIT JAM Geology Question Paper
Q.1 Glaciers are downward moving bodies of
(A) only snow
(B) mostly ice and some snow at the top
(C) mostly snow and some ice at the top
(D) snow and ice in alternate layers
Q.2 The basal section of amphibole is six-sided while the same of pyroxene is eight-sided. This is because of the absence of the crystal face
(A) {100}
(B) {011}
(C) {111}
(D) {010}
Q.3 The mean density of Earth is about
(A) 2650 kg m-3
(B) 2750 kg m-3
(C) 4400 kg m-3
(D) 5500 kg m-3
Q.4 The surface slope of shield volcano is gentle, but strato-volcano is steep-sided. This is due to variation in
(A) environment of eruption
(B) duration of eruption
(C) viscosity of magma
(D) position with respect to latitude
Q.5 An apatite crystal cut perpendicular to c-axis shows outward movement of isochromes in NE and SW quadrants on insertion of quartz wedge from SE quadrant because apatite is
(A) uniaxial positive
(B) biaxial negative
(C) uniaxial negative
(D) biaxial positive
Q.6 Which of the given minerals is a product of reaction between siliceous magmatic fluid and limestone?
(A) andalusite
(B) fayalite
(C) muscovite
(D) wollastonite
Q.7 A plutonic rock consisting only of plagioclase, pyroxene and hornblende as major minerals is known as
(A) dunite
(B) lherzolite
(C) granite
(D) diorite
Q.8 A normal fault has a dip of 45o towards east, and a throw of 100 metres. The heave of the fault (in metres) is
(A) 50
(B) 100
(C) 200
(D) 400
Q.9 Leakage through rock fractures below a dam can be reduced significantly by
(A) bolting
(B) grouting
(C) drilling
(D) blasting
Q.10 Consider the following statements regarding way-up criteria in sets of trough cross-beds.
P: Cross-beds are concave upwards
Q: Cross-beds are truncated towards the top
R: Cross-beds have tangential contact towards the bottom
(A) P is true, Q is false and R is true
(B) P is false, Q is true and R is true
(C) P is true, Q is true and R is true
(D) P is false, Q is false and R is false
Q.11 The correct sequence of rocks from top to bottom in an ophiolite is
(A) radiolarian chert – pillow basalt – dolerite dyke – gabbro – peridotite
(B) peridotite – pillow basalt – gabbro – dolerite dyke – radiolarian chert
(C) pillow basalt – radiolarian chert – dolerite dyke – gabbro – peridotite
(D) gabbro – pillow basalt – dolerite dyke – radiolarian chert – peridotite
Q.12 Extensional regime in an area is characterized by the presence of
(A) synform and antiform
(B) thrust fault
(C) normal fault
(D) strike-slip fault
Q.13 Adit is an underground excavation, which is
(A) a horizontal opening giving access to main tunnel
(B) a horizontal opening used for transporting water to powerhouse
(C) a vertical opening used for multiple purposes
(D) an inclined opening providing access to main tunnel
Q.14 The ratio of volume of underground water released under gravity to the total volume of saturated aquifer is called
(A) transmissivity
(B) permeability
(C) storage coefficient
(D) specific yield
Q.15 Hanging valley is developed when rate of glacial erosion
(A) is greater in the main valley as compared to the side valley
(B) is greater in the side valley as compared to the main valley
(C) is the same in both the main valley and the side valley
(D) has no effect on either the main valley or the side valley
IIT JAM Geology Question Paper
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