R4RIN – MCQs, Mock Tests | Gate GATE Geology and Geophysics Set 2

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

In which of the following crystal systems, the characteristic symmetry elements "a two-fold axis of rotation and at least two planes of symmetry are possible?

1. Tetragonal
2. Hexagonal
3. Orthorhombic
4. Monoclinic

✅ Correct Answer: 3

Determine the correctness or otherwise of the following Assertion [a] and Reason [r]. Assertion: Biaxial minerals can be pleochroic in three shades. Reason: Biaxial minerals have three refractive indices.

1. Both [a] and [r] are true and [r] is the correct reason for [a]
2. [a] is true but [r] is false
3. Both [a] and [r] are true but [r] is not the correct reason for [a]
4. [a] is false but [r] is true

✅ Correct Answer: 1

The correct sequence of metamorphic facies with increasing depth in a subduction zone is

1. greenschist, blueschist, eclogite
2. greenschist, eclogite, blueschist
3. blueschist, greenschist, eclogite
4. blueschist, eclogite, greenschist

✅ Correct Answer: 1

Which one of the following basins is producing petroleum from the coal-rich reservoir rocks?

1. Rajasthan Basin
2. Cambay Basin
3. Cauvery Basin
4. Krishna"“Godavari Basin

✅ Correct Answer: 2

Which one of the following basins is producing petroleum from the coal-rich reservoir rocks?

1. Rajasthan Basin
2. Cambay Basin
3. Cauvery Basin
4. Krishna"“Godavari Basin

✅ Correct Answer: 2

A major thrust in the Himalayas has resulted in intense shearing of a zone about 0.5 km wide on either side of the thrust leading to landslides. Which GIS function can be used to display the shear zone?

1. Contiguity (adjacency)
2. Spread
3. Proximity (buffer)
4. Search

✅ Correct Answer: 3

Vertical exaggeration commonly occurs during stereo-viewing of aerial photographs. Where does it occur?

1. In the photographs
2. In the terrain
3. In the stereoscope
4. In the perceptor's mind

✅ Correct Answer: 4

Herringbone structure is generally formed in which of the following environments?

1. Fluvial
2. Aeolian
3. Lacustrine
4. Tidal

✅ Correct Answer: 4

In a typical coal mine area affected by acid mine drainage, which one of the following acids will be dominant?

1. Nitric acid
2. Sulphuric acid
3. Hydrochloric acid
4. Hydrofluoric acid

✅ Correct Answer: 2

Match the items in Group I with those in Group II. Group I Group II P. Theca 1. Trilobite Q. Midrib 2. Brachiopod R. Deltidium 3. Glossopteris S. Pygidium 4. Graptolite 5. Diatoms

1. P-3, Q-4, R-5, S-1
2. P-4, Q-3, R-2, S-1
3. P-5, Q-3, R-2, S-1
4. P-2, Q-4, R-5, S-1

✅ Correct Answer: 2

Which of the following statements is true?

1. Transposition foliation is an indication of superposed folding
2. Stratigraphic information is retained in transposition structures
3. Transposition foliation develops parallel to axial plane of tight fold
4. Fold closures can be well identified in transposition structures

✅ Correct Answer: 3

Match the items in Group I with those in Group II. Group I Group II P. Churching 1. Concrete gravity dam Q. Curtain grouting 2. Tunnelling R. Piping 3. Cement S. Pozzolan 4. Earth dam

1. P-2, Q-1, R-4, S-3
2. P-4, Q-1, R-2, S-3
3. P-2, Q-3, R-1, S-4
4. P-1, Q-2, R-3, S-4

✅ Correct Answer: 1

Match the items in Group I with those in Group II. Group I Group II P. Churching 1. Concrete gravity dam Q. Curtain grouting 2. Tunnelling R. Piping 3. Cement S. Pozzolan 4. Earth dam

1. P-2, Q-1, R-4, S-3
2. P-4, Q-1, R-2, S-3
3. P-2, Q-3, R-1, S-4
4. P-1, Q-2, R-3, S-4

✅ Correct Answer: 1

A horizontally bedded sandstone outcrop exhibits planar cross-beds at a number of places. The dip directions of the foresets of cross-beds at these locations are: N350°, N17°, N355°, N355°, N15°, N360°, N350°, N13°, N350°, N355°. Find the mean palaeocurrent direction.

1. N15°
2. N350°
3. N355°
4. N360

✅ Correct Answer: 4

Copper ore deposit with significant content of molybdenum occurs in

1. thin layers of shale
2. basic-ultrabasic rocks
3. volcanogenic (rhyolitic) sedimentary rocks
4. andesite porphyry

✅ Correct Answer: 4

An example of the above type of copper deposit is

1. Kupfersciefer, Germany
2. Chuquicamata, Chile
3. Kurroko, Japan
4. Sudbury, Canada

✅ Correct Answer: 2

Microfossils are widely used in palaeoceanographic studies. Which of the following microfossil groups is generally found in deep sea below the Carbonate Compensation Depth?

1. Foraminifera
2. Radiolaria
3. Cocoliths
4. Ostracods

✅ Correct Answer: 2

Microfossils are widely used in palaeoceanographic studies. What is the test composition of the microfossil group identified above?

1. Carbonate
2. Phosphate
3. Nitrate
4. Siliceous

✅ Correct Answer: 4

Which one of the following options is the closest in meaning to the word given below? Pacify

1. Excite
2. Soothe
3. Deplete
4. Tire

✅ Correct Answer: 2

Choose the most appropriate pair of words from the options given below to complete the following sentence: The high level of ___ of the questions in the test was ___ by an increase in the period of time allotted for answering them.

1. difficulty, compensated
2. exactitude, magnified
3. aptitude, decreased
4. attitude, mitigated

✅ Correct Answer: 1

Choose the grammatically CORRECT sentence:

1. He laid in bed till 8 o'clock in the morning.
2. He layed in bed till 8 o'clock in the morning.
3. He lain in bed till 8 o'clock in the morning.
4. He lay in bed till 8 o'clock in the morning

✅ Correct Answer: 4

Which one of the parts (A, B, C, D) in the sentence contains an ERROR? No sooner had the doctor seen the results of the blood test, than he suggested the patient to see the specialist.

1. no sooner had
2. results of the blood test
3. suggested the patient
4. see the specialist

✅ Correct Answer: 3

Ten teams participate in a tournament. Every team plays each of the other teams twice. The total number of matches to be played is

1. 20
2. 45
3. 60
4. 90

✅ Correct Answer: 4

A value of x that satisfies the equation log x + log (x “ 7) = log (x + 11) + log 2 is

1. 1
2. 2
3. 7
4. 11

✅ Correct Answer: 4

Which one of the parts (A, B, C, D) in the sentence contains an ERROR? No sooner had the doctor seen the results of the blood test, than he suggested the patient to see the specialist.

1. no sooner hard
2. results of the blood test
3. suggested the patient
4. see the specialist

✅ Correct Answer: 3

Ten teams participate in a tournament. Every team plays each of the other teams twice. The total number of matches to be played is

1. 20
2. 45
3. 60
4. 90

✅ Correct Answer: 4

A value of x that satisfies the equation log x + log (x “ 7) = log (x + 11) + log 2 is

1. 1
2. 2
3. 7
4. 11

✅ Correct Answer: 4

Let f(x) = x “ [x], where x â‰¥ 0 and [x] is the greatest integer not larger than x. Then f(x) is a

1. monotonically increasing function
2. monotonically decreasing function
3. linearly increasing function between two integers
4. linearly decreasing function between two integers

✅ Correct Answer: 3

Ravi is taller than Arun but shorter than Iqbal. Sam is shorter than Ravi. Mohan is shorter than Arun. Balu is taller than Mohan and Sam. The tallest person can be

1. Moha
2. Ravi
3. Balu
4. Arun

✅ Correct Answer: 3

A smuggler has 10 capsules in which five are filled with narcotic drugs and the rest contain the original medicine. All the 10 capsules are mixed in a single box, from which the customs officials picked two capsules at random and tested for the presence of narcotic drugs. The probability that the smuggler will be caught is

1. 0.50
2. 0.67
3. 0.78
4. 0.82

✅ Correct Answer: 3

The documents expose the cynicism of the government officials “ and yet as the media website reflects, not a single newspaper has reported on their existence. Which one of the following inferences may be drawn with the greatest accuracy from the above passage?

1. Nobody other than the government officials knew about the existence of the documents.
2. Newspapers did report about the documents but nobody cared.
3. Media reports did not show the existence of the documents.
4. The documents reveal the attitude of the government officials.

✅ Correct Answer: 4

The documents expose the cynicism of the government officials “ and yet as the media website reflects, not a single newspaper has reported on their existence. Which one of the following inferences may be drawn with the greatest accuracy from the above passage?

1. Nobody other than the government officials knew about the existence of the documents.
2. Newspapers did report about the documents but nobody cared.
3. Media reports did not show the existence of the documents.
4. The documents reveal the attitude of the government officials.

✅ Correct Answer: 4

It takes approximately _________ minutes for sunlight to reach the Earth.

1. 7 to 7.3
2. to 8.3
3. 9 to 9.3
4. 10 to 10.3

✅ Correct Answer: 2

In a remotely sensed data of a planet, the presence of hydrous species can be inferred using _________region of the electromagnetic spectrum?

1. Radiowave
2. Gamma
3. Infrared
4. Visible

✅ Correct Answer: 3

Amongst the following, which one will have the highest P-wave velocity?

1. Granite
2. Diamond
3. Shale
4. Talc

✅ Correct Answer: 2

Assuming the Earth to be a perfect sphere, its equatorial velocity is approximately __________ km/hr

1. 1600 to 1700
2. 2000 to 2100
3. 1200 to 1300
4. 1800 to 1900

✅ Correct Answer: 1

Both strength and plasticity of a rock increase with the

1. increase in temperature
2. decrease in strain rate
3. increase in confining pressure
4. increase in pore fluid pressure

✅ Correct Answer: 3

Amongst the following options, the acceptable value of the Poisson's ratio of a rock is

1. 0.55
2. 1.00
3. 0.25
4. -1.00

✅ Correct Answer: 3

The acceleration due to gravity, 'g' is maximum at

1. equato
2. poles
3. mid-latitudes
4. sub-tropical regions

✅ Correct Answer: 2

The most abundant mineral in the Earth's crust is

1. quartz
2. K-feldspa
3. biotite
4. garnet

✅ Correct Answer: 1

Acoustic impedance is the _____________ of density and velocity.

1. sum
2. difference
3. product
4. ratio

✅ Correct Answer: 3

Choose the diamagnetic mineral from the following.

1. Calcite
2. Enstatite
3. Pyrite
4. Ilmenite

✅ Correct Answer: 1

Two bodies made up of same material with different dimensions have

1. same resistances and resistivities
2. same resistivities but different resistances
3. same resistances but different resistivities
4. different resistances and resistivities

✅ Correct Answer: 2

The type of wave that arrives first at a station from an earthquake hypocenter is

1. P-wave
2. S-wave
3. Rayleigh wav
4. Love wave

✅ Correct Answer: 1

Match the following items of Group I with those of Group II. Group I Group II P) Electrical Method 1) Density Q) Magnetic Method 2) Velocity R) Gravity Method 3) Resistivity S) Seismic Method 4) Susceptibility 5) Dielectric Permittivity A.

1. P "“ 3 ; Q "“ 2 ; R "“ 5 ; S "“ 1
2. P "“ 3 ; Q "“ 4 ; R "“ 1 ; S "“ 2
3. P "“ 3 ; Q "“ 4 ; R "“ 2 ; S "“ 1
4. P "“ 5 ; Q "“ 4 ; R "“ 3 ; S "“ 2

✅ Correct Answer: 1

If a radioactive isotope has a decay constant of 1.55 * 10-10 year-1, its half-life (in years) would be

1. 4.57 * 109
2. 4.47 * 109
3. 4.57 * 1010
4. 4.47 * 1010

✅ Correct Answer: 2

Which of the following physical properties of rocks has the widest range of variation?

1. Magnetic permeability
2. Dielectric permittivity
3. Seismic velocity
4. Electrical resistivity

✅ Correct Answer: 4

If two nodes are observed at a frequency of 1800 rpm during whirling of a simply supported long slender rotating shaft, the first critical speed of the shaft in rpm is

1. 200
2. 450
3. 600
4. 900

✅ Correct Answer: 1

A planar closed kinematic chain is formed with rigid links PQ = 2.0 m, QR = 3.0 m, RS = 2.5 m and SP = 2.7 m with all revolute joints. The link to be fixed to obtain a double rocker (rockerrocker) mechanism is

1. PQ
2. QR
3. RS
4. SP

✅ Correct Answer: 3

Let X be a normal random variable with mean 1 and variance 4. The probability P{X < 0} is

1. 0.5
2. greater than zero and less than 0.5
3. greater than 0.5 and less than 1.0
4. 1.0

✅ Correct Answer: 2

Choose the CORRECT set of functions, which are linearly dependent.

1. sin x , sin2 x and cos2 x
2. cos x , sin x and tan x
3. cos 2x , sin2 x and cos2 x
4. cos 2x , sin x and cos x

✅ Correct Answer: 3

he function f (t ) satisfies the differential equation d2f/dt2 + f = 0 and the auxiliary conditions, f(0) = 0, df/dt(0) = 4. The Laplace transform of f (t) is given by

1. 2/(s + 1)
2. 4/(s + 1)
3. 4/(s2 + 1)
4. 2/(s4 + 1)

✅ Correct Answer: 3

Specific enthalpy and velocity of steam at inlet and exit of a steam turbine, running under steady state, are as given below: Specific enthalpy (kJ/kg) Velocity (m/s) Inlet steam condition 3250 180 Exit steam condition 2360 5 The rate of heat loss from the turbine per kg of steam flow rate is 5 kW. Neglecting changes in potential energy of steam, the power developed in kW by the steam turbine per kg of steam flow rate, is

1. 901.2
2. 911.2
3. 17072.5
4. 17082.5

✅ Correct Answer: 1

Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is 20 mm with uniform velocity of 2 m/s. Acceleration due to gravity is 9.81 m/s2. Assuming steady, inviscid flow, constant atmospheric pressure everywhere and neglecting curvature and surface tension effects, the diameter in mm of the stream 0.5 m below the tap is approximately

1. 10
2. 15
3. 20
4. 25

✅ Correct Answer: 2

A steel ball of diameter 60 mm is initially in thermal equilibrium at 1030°C in a furnace. It is suddenly removed from the furnace and cooled in ambient air at 30°C, with convective heat transfer coefficient h = 20 W/m2K. The thermo-physical properties of steel are: density Ï = 7800 kg/m3, conductivity k = 40 W/mK and specific heat c = 600 J/kgK. The time required in seconds to cool the steel ball in air from 1030°C to 430°C is

1. 519
2. 931
3. 1195
4. 2144

✅ Correct Answer: 4

A flywheel connected to a punching machine has to supply energy of 400 Nm while running at a mean angular speed of 20 rad/s. If the total fluctuation of speed is not to exceed ± 2%, the mass moment of inertia of the flywheel in kg-m2 is

1. 25
2. 50
3. 100
4. 125

✅ Correct Answer: 1

Two cutting tools are being compared for a machining operation. The tool life equations are: Carbide tool: VT1.6 = 3000 HSS tool: VT0.6 = 200 where V is the cutting speed in m/min and T is the tool life in min. The carbide tool will provide higher tool life if the cutting speed in m/min exceeds

1. 15.0
2. 39.4
3. 49.3
4. 60.0

✅ Correct Answer: 2

In a CAD package, mirror image of a 2D point P(5,10) is to be obtained about a line which passes through the origin and makes an angle of 45° counterclockwise with the X-axis. The coordinates of the transformed point will be

1. (7.5, 5)
2. (10, 5)
3. (7.5, -5)
4. (10, -5)

✅ Correct Answer: 2

A linear programming problem is shown below. Maximize 3x + 7y Subject to 3x + 7y â‰¤ 10 4x + 6y â‰¤ 8 x, y â‰¥ 0 It has

1. an unbounded objective function.
2. exactly one optimal solution.
3. exactly two optimal solutions.
4. infinitely many optimal solutions.

✅ Correct Answer: 2

During the electrochemical machining (ECM) of iron (atomic weight = 56, valency = 2) at current of 1000 A with 90% current efficiency, the material removal rate was observed to be 0.26 gm/s. If Titanium (atomic weight = 48, valency = 3) is machined by the ECM process at the current of 2000 A with 90% current efficiency, the expected material removal rate in gm/s will be

1. 0.11
2. 0.23
3. 0.30
4. 0.52

✅ Correct Answer: 3

Sedimentary structures are useful for determining the younging direction of a bed. Which sedimentary process is responsible for the generation of the structure identified above?

1. Wave reworking
2. Liquefaction of sediments
3. Drying and desiccation
4. Erosion of cohesive substrate

✅ Correct Answer: 4

A number is as much greater than 75 as it is smaller than 117. The number is:

1. 91
2. 93
3. 89
4. 96

✅ Correct Answer: 4

The professor ordered to the students to go out of the class. I II III IV Which of the above underlined parts of the sentence is grammatically incorrect?

1. I
2. II
3. III
4. IV

✅ Correct Answer: 2

Which of the following options is the closest in meaning to the word given below: Primeval

1. Modern
2. Historic
3. Primitive
4. Antique

✅ Correct Answer: 3

Friendship, no matter how _________it is, has its limitations.

1. cordial
2. intimate
3. secret
4. pleasant

✅ Correct Answer: 2

Select the pair that best expresses a relationship similar to that expressed in the pair: Medicine: Health

1. Science: Experiment
2. Wealth: Peace
3. Education: Knowledge
4. Money: Happiness

✅ Correct Answer: 3

X and Y are two positive real numbers such that 2X + Y â‰¤ 6 and X + 2Y â‰¤ 8. For which of the following values of (X, Y) the function f(X, Y) = 3X + 6Y will give maximum value?

1. (4/3, 10/3)
2. (8/3, 20/3)
3. (8/3, 10/3)
4. (4/3, 20/3)

✅ Correct Answer: 1

If |4X - 7|= 5 then the values of 2|X| - |-X| is :

1. 2, 1/3
2. 1/2, 3
3. 3/2, 9
4. 2/3, 9

✅ Correct Answer: 2

Abhishek is elder to Savar. Savar is younger to Anshul. Abhishek is elder to AnshulB. Anshul is elder to AbhishekC. Abhishek and Anshul are of the same ageD. No conclusion follows

1. Abhishek is elder to Anshul
2. Anshul is elder to Abhishek
3. Abhishek and Anshul are of the same age
4. No conclusion follows

✅ Correct Answer: 4