Gate MCQ Quiz Hub

1. In Mohs' scale of hardness, how many minerals are of silicate composition?
4
5
6
7

2. Which one of the following river systems forms the largest fluvio-deltaic system in the world?
Mississippi"“Ohio
Red"“Mekong
Ganga"“Brahmaputra
Yellow"“Ba Hoi

3. Which one amongst the following rocks commonly has highest unconfined compressive strength?
Coarse-grained sandstone
Mica schist
Fossiliferous limestone
Massive basalt

4. Eparchean unconformity separates geological units of
early Archaean from late Archaean
Archaean from Proterozoic
Proterozoic from Palaeozoic
Archaean from Phanerozoic

5. If the rake of net slip of an inclined fault is 90°, the fault is
strike-slip fault
dip-slip fault
oblique-slip fault
transcurrent fault

6. 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)
2.50
4.00
6.25
12.00

7. Bouguer correction is applied to correct for the gravity anomaly due to mass between station location and
mean sea level
local datum plane
base of upper crust
Mohorovicic discontinuity

8. Which one of the following can be estimated from SP log against a saline-water saturated sandstone formation encountered in a well?
Resistivity of formation water
Degree of water saturation
Depth of invasion
Permeability

9. During its orbital motion around the Sun, the Earth is nearest to the Sun on
March 21
July 4
September 23
January 3

10. Which one of the following can be best explored using electromagnetic method?
Oil-bearing strata
Coal-bearing strata
Disseminated sulphide deposit
Massive sulphide deposit

11. Which physical property of the medium governs the response of Ground Penetrating Radar (GPR)?
Electrical conductivity
Electromagnetic conductivity
Seismic wave velocity
Electrical permeability (dielectric permittivity)

12. Out of the following gases which one has the highest contribution towards the greenhouse effect on the Earth?
CO2
CO
CH4
H2O

13. Which of the following is NOT a variety of silica (SiO2)?
Jasper
Coesite
Stishovite
Flinkite

14. Which of the following is NOT a variety of silica (SiO2)?
Jasper
Coesite
Stishovite
Flinkite

15. 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?
Aquifer
Aquitard
Aquiclude
Aquifuge

16. The Jurassic stratigraphic succession of Kutch is characterized by which one of the following?
Cephalopods
Trilobites
Brachiopods
Graptolites

17. 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?
Fe-O
Si-O
Al-OH
Mg-OH

18. When did the supercontinent Pangaea begin to break up?
Cenozoic
Mesozoic
Palaeozoic
Proterozoic

19. In which of the following localities does coal deposit occur?
Dariba
Kudremukh
Wardha
Rudrasagar

20. 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).
0.4
0.8
1.2
1.6

21. 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?
5
10
20
30

22. 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.
4
20
100
500

23. 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
2
3
4

24. 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.
0
1
2
3

25. Ca-montmorillonite is formed by the chemical weathering of
calcite
augite
orthoclase
forsterite