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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

Topic:- GEO MPHIL S2

Why do conjugate faults show opposite senses of slip? Select the correct explanation from below:
1. Orientation of stress axes (s1, s2, and s3) are opposite for the two conjugate fault planes
2. s2 becomes vertical for one of the two conjugate planes
3. both the fault planes are oriented symmetrically with respect to s1, but in opposite sense
4. s1 and s2 axes swap their position after some amount of deformation
Correct Answer :- both the fault planes are oriented symmetrically with respect to s1, but in opposite sense
In simple shear, the angle between the longest (?1) axis of the finite strain ellipsoid and the shear direction (?) varies with the amount of shear strain (?) according to which of the following relationships?
1. ? increases as ? increases
2. ? decreases as ? increases
3. ? remains constant as ? increases
4. these two parameters have no predictable relationship
Correct Answer :- ? decreases as ? increases

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In a multilayered rock, the viscosity ratio of the competent and incompetent layers (µ1/ µ2) is high and the packing distance between layers (n) is low. What is the most likely structure that will develop in such a system under layer-parallel shortening?
1. Kink fold
2. Cuspate-lobate fold
3. Ptygmatic fold
4. no folding - only homogeneous thickening of layers
Correct Answer :- Kink fold
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Brittle deformation of rocks is favoured at a shallow depth, whereas ductile flow takes place at greater depth because
1. brittle deformation of rocks leads to increase in volume
2. ductile deformation is favoured only in rocks with smaller grain size
3. ductile deformation can take place only in presence of a fluid phase
4. 'e formation caccur only at high temperature
Correct Answer :- brittle deformation of rocks leads to increase in volume
Which of the following shows a correct sequence of recrystallization mechanism in quartz with increasing temperature?
1. Subgrain Rotation - Bulging - Grain Boundary Migration
2. Bulging Grain Boundary Migration - Subgrain Rotation
3. Bulging - Subgrain Rotation - Grain Boundary Migration
4. None of these
Correct Answer :- Bulging - Subgrain Rotation - Grain Boundary Migration
Trapezoid shaped boudins are characteristically found in
1. extension fracture boudinage
2. symmetric shear fracture boudinage
3. asymmetric shear fracture boudinage
4. post-boudinage deformation
Correct Answer :- symmetric shear fracture boudinage
If, in a folded layered sequence, thinner layers show smaller folds and thicker layers show larger folds, the fold structure will be called:
1. disharmonic fold
2. arrowhead fold
3. polyclinal fold
4. fan fold
Correct Answer :- disharmonic fold

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Geostrophic currents
1. flow inside the mantle
2. are controlled by a balance between pressure gradient force and Coriolis deflection
3. are controlled by ocean's tropic levels
4. generated due to tidal action of moon
Correct Answer :- are controlled by a balance between pressure gradient force and Coriolis deflection
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Porosity of a formation is summation of:
1. Hydraulic conductivity and Transimissivity
2. Specific storage and Specific retention
3. Specific retention and Specific yield
4. Hydraulic conductivity & Transmissivity
Correct Answer :- Specific retention and Specific yield
Conodonts are useful microfossils in the biostratigraphic subdivision of
1. Archean
2. Cenozoic
3. Cretaceous
4. Paleozoic
Correct Answer :- Paleozoic
d18O of Mixed layer planktic foraminiferal test formed during a glacial period would be
1. Higher compared to that formed during interglacial period
2. Equal to that of formed during interglacial period
3. Lower compared to that formed during interglacial period
4. None of these
Correct Answer :- Higher compared to that formed during interglacial period
Why was Paleomagnetism so important in discovering plate tectonics?
1. it illustrated the location of the North Pole
2. It illustrated sea floor spreading
3. it allowed measurement of mountain building rates
4. It allowed the depth of the oceans to be measured
Correct Answer :- It illustrated sea floor spreading

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A polar wandering curve:
1. shows that the magnetic poles wandered relative to fixed continents
2. shows that the rotational poles wandered to fixed continents
3. shows that the continents wandered relative to generally-fixed pole positions
4. is a graph of the Mercalli Index
Correct Answer :- shows that the continents wandered relative to generally-fixed pole positions
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The 'Lehmann discontinuity' in the Earth is identified by
1. 5-6% decrease in P and S wave velocity
2. 3-4% increase in P and S wave velocity
3. 5% decrease in density
4. 5% increase in S wave velocity
Correct Answer :- 3-4% increase in P and S wave velocity
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Assemblage zones are not good for intercontinental correlation. Reason R: They are very much environmentally controlled. In light of the above statements, choose the correct answer from the options given below
1. R explains A
2. R does not explain A
3. A and R are false
4. R is false
Correct Answer :- R does not explain A
In steady state/equilibrium groundwater flow situation, the water table head during pumping:
1. Does not change with time
2. Changes with time
3. Changes without time
4. Remains constant
Correct Answer :- Does not change with time
For unconfined aquifer, the storage coefficient is approximately equal to:
1. Transmissivity
2. Intrinsic permeability
3. Specific retention
4. Specific yield
Correct Answer :- Specific yield

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Preservation of fossils represent
1. Stagnation deposits
2. Obrution deposits
3. Concentration deposits
4. Conservation traps
Correct Answer :- Conservation traps
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Which of this typically represents elastic scattering?
1. Backscattered electrons
2. Auger electrons
3. Secondary electrons
4. Heating caused by electron beam-matter interaction
Correct Answer :- Backscattered electrons
In-phase diffraction of any electromagnetic wave by a regularly spaced grating is
1. Reciprocal and normal
2. Only reciprocal
3. Only normal
4. Destructive interference
Correct Answer :- Reciprocal and normal
Relationship between energy of characteristic X-ray and atomic number is defined by
1. Mosely's Law
2. Steno's Law
3. Beers Law
4. Harper's Index
Correct Answer :- Mosely's Law
This cannot provide the width of distribution around a central tendency of any dataset
1. Arithmetic average
2. Standard deviation
3. Variance
4. Both Arithmetic average and variance
Correct Answer :- Arithmetic average

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The value of "Hue" in the Munsell notations used for colour estimations refers to
1. Red, yellow, blue colours
2. Lightness of the colours
3. Strength of the colours
4. All of these
Correct Answer :-
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Which of the following in petrographic criteria suggests the advanced stage of pedogenic carbonate development?
1. Few calcans and micrite
2. Nodules and calcans
3. Recrystallised nodules and microspars
4. Micrite in the groundmass
Correct Answer :- Recrystallised nodules and microspars
Removal of organic matter, carbonate, and free iron is required for of the particles during grain size.
1. Flocculation
2. Lithification
3. Dispersal
4. Cementation
Correct Answer :- Dispersal
Which of the following sediment size refers to fine clay fraction?
1. < 2 mm
2. <0.2 mm
3. <0.2 µm
4. <2 µm
Correct Answer :- <0.2 µm
If a marker bed cut by a fault does not show any displacement across the fault line, the most likely reason is:
1. the marker bed is later than the fault
2. the fault is a reverse fault
3. the fault is a trace-slip fault
4. the fault slip is seismic in nature
Correct Answer :- the fault is a trace-slip fault

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To assess dislocation density in a deformed crystal, which of the following instruments is best suited?
1. Electron Probe Micro-Analyzer (EPMA)
2. Scanning Electron Microscope (SEM)
3. X-ray Fluorescence (XRF)
4. Transmission Electron Microscope (TEM)
Correct Answer :- Transmission Electron Microscope (TEM)
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For dating a Precambrian porcellanite bed the most suitable geochronological method is
1. C-14 method
2. Rb-Sr method
3. Sm-Nd method
4. U-Pb method
Correct Answer :- U-Pb method
Marine carbonate cement precipitated during glacial period will show
1. High d18O-signature
2. Low d18O signature
Correct Answer :- High d18O-signature
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Wavelengths of electron beam in SEM is typically
1. Few picometers to few tens of picometers
2. Few nanometers
3. Few hundreds of nanometers
4. Few tens of nanometers
Correct Answer :- Few picometers to few tens of picometers
ZAF correction in EP? refers to
1. Fluorescence, atomic number and absorption correction
2. Atomic number, thickness and fluorescence correction
3. Atomic number, absorption and frequency correction
4. None of these
Correct Answer :- Fluorescence, atomic number and absorption correction
Relationship between the incident angle and the diffraction angle in an X-ray diffraction instrument is
1. Incident angle is twice the diffraction angle
2. Both are equal
3. Incident angle is half of the diffraction angle
4. Diffraction angle is half of incident angle
Correct Answer :- Incident angle is half of the diffraction angle
Halophytes are the plants that are indicative of
1. Saline deposits
2. Fresh water deposits
3. Hydrocarbons
4. Non-metallic ores
Correct Answer :- Saline deposits

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Which of the following parameters is considered to determine the reflectance of a vegetation canopy?
1. Chlorophyll content
2. Azimuth angle
3. Solar Zenith angle
4. All of these
Correct Answer :- All of these
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In the internal part of an orogen, rocks
1. along the margins of the orogen, where rocks undergo thrusting above a detachment
2. in the internal part where rocks have been squeezed up from great depth
3. in the grabens
4. in the horsts
Correct Answer :- along the margins of the orogen, where rocks undergo thrusting above a detachment
In XRD studies, persistence of the 14.4 A° peak at 550°C of the K saturated clays confirms the presence of
1. Illite
2. Kaolinite
3. Smectite
4. Chlorite
Correct Answer :- Chlorite
A rapid and progressive increase of the smectite in the in the clay mineral assemblage indicates
1. Change of the source rock with dominance of Feldspar
2. Change of the source rock with dominance of Mica
3. Change of the source rock with dominance of Quartz
4. Change of the source rock with dominance of Carbonates
Correct Answer :- Change of the source rock with dominance of Feldspar
The Middle-Miocene Climatic Optima at about 15 Ma is marked by
1. Warming
2. Cooling
3. Extreme warming
4. Extreme cooling
Correct Answer :- Warming

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The values of 50-60 for the chemical index of alteration (CIA) to assess weathering of silicate rock suggest
1. Advanced stage of weathering
2. Incipient stage of weathering
3. Moderate stage of weathering
4. Very strong weathering
Correct Answer :- Incipient stage of weathering
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Which of the following is true during deep burial?
1. Possible addition and re-distribution of K
2. Possible addition and re-distribution of Ti
3. Possible addition and re-distribution of Al
4. Possible addition and re-distribution of Na
Correct Answer :- Possible addition and re-distribution of K
The meandering rivers are marked by
1. Shallowest section at crossovers and the deepest section at bends
2. Deepest section at crossovers and the shallowest section at bends
3. Uniform depth at crossovers and at the bends
4. Deep sections both at crossovers and the bends
Correct Answer :- Shallowest section at crossovers and the deepest section at bends
Facies analysis of the gravel dominated braided rivers shows
1. St as the main facies
2. Gm as the main facies
The meandering rivers are characterized by
1. Sinuosity >1.3 and bed load <11%
2. Sinuosity <1.3 and bed load >11%
3. Sinuosity >1.3 and bed load >11%
4. Sinuosity <1.3 and bed load <11%
Correct Answer :- Sinuosity >1.3 and bed load <11%
In braided rivers, the width/depth ratio is and the bed load is
1. Width/Depth ratio <40 and bead load <11%
2. Width/Depth ration >40 and bead load >11%
3. Width/Depth ratio <40 and bead load >11%
4. Width/Depth ratio > 40 and bead load <11%
Correct Answer :- Width/Depth ration >40 and bead load >11%
The longitudinal/medial bars in braided rivers occur as
1. Bar deposits elongated transvers to the flow direction
2. Bar deposits elongated parallel to the flow directions
3. Bar deposits along the convex side of the of the banks
4. Bar deposits along the concave side of the banks
Correct Answer :- Bar deposits elongated parallel to the flow directions
Which of the following geophysical method is most suitable for groundwater exploration?
1. Resistivity
2. Magnetic
3. Sonic
4. Gravity
Correct Answer :- Resistivity

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Theim's equation for steady state radial flow to a tubewell in confined aquifer can be used to estimate:
1. Transmissivity only
2. Specific yield only
3. Both Transmissivity and Storativity
Correct Answer :- Transmissivity only

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The major ions considered for hydrochemical facies analysis using trilinear plot are
1. Sodium, Potassium, Phosphorus, Magnesium, Chloride, Sulphate, Carbonate and Nitrate
2. Sodium, Potassium, Calcium, Magnesium, Chloride, Sulphate, Carbonate and Bicarbonate
3. Arsenic, Potassium, Calcium, Lead, Fluoride, Sulphate, Carbonate and Bicarbonate
4. Zinc, Mercury, Calcium, Magnesium, Aluminium, Sulphate, Carbonate and Bicarbonate
Correct Answer :- Sodium, Potassium, Calcium, Magnesium, Chloride, Sulphate, Carbonate and Bicarbonate
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Rainwater harvesting and artificial recharge to groundwater is generally done in
1. Shallow groundwater level areas
2. In wetlands
3. In areas with deeper water levels, where water table is declining heavily
4. In areas along and close to water bodies
Correct Answer :- In areas with deeper water levels, where water table is declining heavily

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This download link is referred from the post: DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

This post was last modified on 27 December 2020

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