R4RIN – MCQs, Mock Tests | Gate GATE Geology and Geophysics

In Mohs' scale of hardness, how many minerals are of silicate composition?

1. 4
2. 5
3. 6
4. 7

✅ Correct Answer: 1

Which one of the following river systems forms the largest fluvio-deltaic system in the world?

1. Mississippi"“Ohio
2. Red"“Mekong
3. Ganga"“Brahmaputra
4. Yellow"“Ba Hoi

✅ Correct Answer: 1

Which one amongst the following rocks commonly has highest unconfined compressive strength?

1. Coarse-grained sandstone
2. Mica schist
3. Fossiliferous limestone
4. Massive basalt

✅ Correct Answer: 4

Eparchean unconformity separates geological units of

1. early Archaean from late Archaean
2. Archaean from Proterozoic
3. Proterozoic from Palaeozoic
4. Archaean from Phanerozoic

✅ Correct Answer: 2

If the rake of net slip of an inclined fault is 90°, the fault is

1. strike-slip fault
2. dip-slip fault
3. oblique-slip fault
4. transcurrent fault

✅ Correct Answer: 2

On a photo-scale of 1:40000, a square shaped open cast coal mine of 1 km2 area would have an area of (in cm2)

1. 2.50
2. 4.00
3. 6.25
4. 12.00

✅ Correct Answer: 3

Bouguer correction is applied to correct for the gravity anomaly due to mass between station location and

1. mean sea level
2. local datum plane
3. base of upper crust
4. Mohorovicic discontinuity

✅ Correct Answer: 3

Which one of the following can be estimated from SP log against a saline-water saturated sandstone formation encountered in a well?

1. Resistivity of formation water
2. Degree of water saturation
3. Depth of invasion
4. Permeability

✅ Correct Answer: 1

During its orbital motion around the Sun, the Earth is nearest to the Sun on

1. March 21
2. July 4
3. September 23
4. January 3

✅ Correct Answer: 4

Which one of the following can be best explored using electromagnetic method?

1. Oil-bearing strata
2. Coal-bearing strata
3. Disseminated sulphide deposit
4. Massive sulphide deposit

✅ Correct Answer: 4

Which physical property of the medium governs the response of Ground Penetrating Radar (GPR)?

1. Electrical conductivity
2. Electromagnetic conductivity
3. Seismic wave velocity
4. Electrical permeability (dielectric permittivity)

✅ Correct Answer: 4

Out of the following gases which one has the highest contribution towards the greenhouse effect on the Earth?

1. CO2
2. CO
3. CH4
4. H2O

✅ Correct Answer: 4

Which of the following is NOT a variety of silica (SiO2)?

1. Jasper
2. Coesite
3. Stishovite
4. Flinkite

✅ Correct Answer: 4

Which of the following is NOT a variety of silica (SiO2)?

1. Jasper
2. Coesite
3. Stishovite
4. Flinkite

✅ Correct Answer: 4

Which one of these is NOT a source of sufficient water supply but can transmit certain quantity of water on a regional scale due to leakage?

1. Aquifer
2. Aquitard
3. Aquiclude
4. Aquifuge

✅ Correct Answer: 2

The Jurassic stratigraphic succession of Kutch is characterized by which one of the following?

1. Cephalopods
2. Trilobites
3. Brachiopods
4. Graptolites

✅ Correct Answer: 1

Which one of the following mineral constituents exhibits strong absorption in the UV-blue band of the EM spectrum due to charge transfer effect leading to colouration?

1. Fe-O
2. Si-O
3. Al-OH
4. Mg-OH

✅ Correct Answer: 1

When did the supercontinent Pangaea begin to break up?

1. Cenozoic
2. Mesozoic
3. Palaeozoic
4. Proterozoic

✅ Correct Answer: 2

In which of the following localities does coal deposit occur?

1. Dariba
2. Kudremukh
3. Wardha
4. Rudrasagar

✅ Correct Answer: 3

Specific discharge of 1 cm per day is observed in a porous medium where hydraulic head difference is 0.5 m and flow length is 20 m. Calculate the hydraulic conductivity (in m/day).

1. 0.4
2. 0.8
3. 1.2
4. 1.6

✅ Correct Answer: 1

A sandstone bed dipping 30° has an outcrop width of 20 m in a flat terrain. What is the true thickness (in m) of the bed?

1. 5
2. 10
3. 20
4. 30

✅ Correct Answer: 2

Calculate the concentration (in ppm) of Ni in olivine that crystallizes from a basaltic magma containing 20 ppm Ni. The partition coefficient (solid/melt) of nickel is 5.

1. 4
2. 20
3. 100
4. 500

✅ Correct Answer: 3

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.

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 1

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.

1. 0
2. 1
3. 2
4. 3

✅ Correct Answer: 3

Ca-montmorillonite is formed by the chemical weathering of

1. calcite
2. augite
3. orthoclase
4. forsterite

✅ Correct Answer: 2