Free Online Geology Test Paper

Free Online Geology Test Paper
Geology Objective Test

Q.1: ln double-chain structure the ratio of silicon to oxygen is:
a) 1 : 3
b) 4: 11
c) 4: 1O
d) 1: 2
Answer. (b)

Q.2: Early crystallised biotites and amphlboles can decomposed into fine aggregates of
felspars, pyroxenes and Fe-Tl oxides , because of:
(a) Water-deficient magma systems.
(b) Very high temperature in the system.
(c) Very high pressure in the system.
(d) Variable magma systems.
Answer. (a)

Q.3: Melilite is an example of:
a) Neso-silicate
b) Soro - silicate
c) Cyclo - silicate
d) lno – silicate
Answer. (b)

Q.4: At what ratio, the intergrowth of orthoclase and quartz minerals give a graphic texture:
(a) 48 : 68.
(b) 52.5 : 60.5.
(c) 65: 78.
(d) 72.5: 27.5.
Answer. (d)

Q.5: Peridot is the gem-variety of:
a) Galena
b) Felspar
c) Olivine
d) Hyperstone
Answer. (c)

Q.6: Phase diagrams are graphic devices illustrating equilibrium between:
(a) Temperature and pressure in the magma.
(b) Different phased and their compositions.
(c) Different compositions of the magma.
(d) Volalites saturation and composition of the magma.
Answer. (b)

Q.7: Olivine commonly alters to which serpentine:
a) Antigorite
b) Chrysotile
c) Picrolite
d) Bastite
Answer. (a)

Q.8: In basaltic rocks, alteration of the outer Iron-rich rim of olivine produce brounish red
mineral called:
a) Nephrite
b) Schorlomite
c) lddingsite
d) Kaolinite
Answer. (c)

Q.9: Which is Iron-aluminum garnet:
a) Grossularite
b) Pyrope
c) Spessartite
d) Almandite
Answer. (d)

Q.10: The role of dissolved water in silicate melts:
(a) Depolymerizes the melt.
(b) Reduces melt viscosity.
(c) Increases diffusion rates and depresses crystallisation temperature.
(d) All the above are correct.
Answer. (d)

Q.11: Manganese-aluminum garnet is known as:
a) Uvarovite
b) Andradite
c) Spessaritite
d) Pyrope
Answer. (c)


Q.12: Epidote crystallises in:
a) Orthorhombic system
b) Monoclinic system
c) Triclinic system
d) Cubic System
Answer. (b)

Q.13: Zonned crystals are formed under the condition of:
(a) Rapid cooling
(b) Slow cooling
(c) Intermediate cooling
(d) Any rate of cooling
Answer. (c)

Q.14: Which rare element replaces the zirconium in zircon:
a) Thorium
b) Cerium
c) Hafnium
d) None
Answer. (c)

Q.15: Sphene is:
a) Magnesium silicate
b) Calcium iron silicate
c) Calcium titanosilicate
d) lron titanosilicate
Answer. (c)

Q.16: Andalusite and sillimanite crystallise in:
a) Monoclinic system
b) Triclinic system
c) Orthorhombic system
d) Hexagonal system
Answer. (c)

Q.17: lf a magma crystallises at a temperature of about 1500°C, its likely composition will be:
(a) Mafic.
(b) Felsic.
(c) Mixture of mafic and felsic.
(d) More felsic less mafic.
Answer. (a)

Q.18: Topaz belongs to:
a) lnosilicate
b) Nesosilicate
c) Sorosilicate
d) Cyclosilicate
Answer. (b)

Q.19: What is the characteristic property of beryl:
a) Colour.
b) Luster.
c) Hexagonal prismatic crystals
d) Uneven fracture
Answer. (c)

Q.20: The hardness of kyanite parallel to the length of the crystal and across it, is
respectively:
a) 4 and 7
b) 4 and 6.
c) 6 and 8.
d) 4 and 5.
Answer. (a)

Q.21: Bowen’s reaction series indicate the process of.... in magma:
(a) Fractional differentiation.
(b) Gravity separation.
(c) Liquid immiscibility.
(d) Filter Pressing
Answer. (a)

Q.22: What is the hardness of staurolite:
a) 5 - 5.5
5) 5 - 6
c) 6 - 6.5
d) 7 - 7.5
Answer. (d)

Q.23: What is the source of the basaltic Iavas of the midoceamic ridges:
(a) Granitic rocks.
(b) Ultrafelsic rocks of the upper mantle.
(c) Ultramafic rocks of the upper mantle.
(d) lt is unkonwn.
Answer. (c)

Q.24: Cordierite is also known as:
a) Iolite
b) Pigeonite
c) Diopside
d) Antigorite
Answer. (a)

Q.25: Rise of magma in shallow regions of the brittle crust is permitted by:
(a) Stoping and Assimilation.
(b) Diatreme formation.
(c) Uplift of roof rocks.
(d) All the above.
Answer. (d)