List of top Questions asked in GATE GG- 2026

A quartz vein in a granitic outcrop has an initial length of 20 cm. If it undergoes uniform stretching resulting in a longitudinal strain of 0.45, the length of the vein post deformation is _________cm (answer in integer).

Considering a surface point source, the horizontal resolution recoverable from the seismic data acquired using a 10 Hz seismic pulse reflected from a depth of 30 km within the crust, with a velocity of 6.5 km/s, is __________ km (rounded off to two decimal places).

Exacerbate : Mitigate :: ___________
Choose the option with the correct pair of words to fill the blank.

How many traces will be present in a zero-offset section that is generated from the following marine seismic survey?

Near offset = 100 m
Shot interval = 20 m
Receiver interval = 10 m
Number of shots = 100
Number of receivers = 1000
(Figure not to scale)

A scintillometer records 300 counts per second (cps) in a radiometric survey. If the background radiation and dead-time of the instrument are 100 cps and 250 \(\mu s\), respectively, then the true net count rate is _______ cps (rounded off to two decimals).

Which of the following is/are the correct explanation(s) for an increase in the adiabatic temperature gradient from the lower mantle (LM) to the outer core (OC)?

The wavelength of a certain portion of the electromagnetic spectrum ranges from 2000 nm to 3000 nm. The highest frequency associated with the above portion of the spectrum is____________\(\times10^{8}\) MHz (rounded off to one decimal place).

A P-wave of frequency 20 Hz is travelling through a non-dispersive medium with a velocity of 5 km/s. The amplitude retained at a distance of 10 km from source is _____________ % (rounded off to one decimal place). (Use quality factor, \(Q = 80\))

In which one of the following layers inside the Earth, the velocity of the P-wave exceeds 13 km/s?

If the depth of penetration of an inducing electromagnetic wave of 1 kHz frequency is 400 m, then the resistivity of the subsurface is __________ \(\Omega\)m (answer in integer).

If the diameter of a scaled-down model of the Earth is 45 cm, then the equivalent length on the surface of the Earth for 1 cm on the model is _____________ km (rounded off to two decimal places).
[Use: Radius of the Earth = 6371 km]

Which of the following statements about digital filters is/are CORRECT?

If \(\hat{f}(t)\) denotes the Hilbert transform of \(f(t)\), then the Hilbert transform of \(\hat{f}(t)\) is equal to

If the inclination of the remanent magnetic field of a 140 million years old crustal block, now located at the equator, is 50\(^\circ\), then its drift-rate is ______________ cm/yr (rounded off to two decimal places). [Use \(1^\circ=111\) km]

A pebble has an average diameter of 8 mm. Its \(\phi\)-value on the Udden-Wentworth scale is ___________ (answer in integer).

An oblique-slip normal fault dipping \(60^{\circ}\)E shows a net slip of 100 m. If the net slip vector has a pitch of \(30^{\circ}\), then the heave of the fault is m (answer in integer).

The figure below shows an infinite-slope model. If \(\tau\) and SS denote the driving shear stress and the resisting shear strength, respectively, then \(\tau\) along the failure plane is \(\times 10^3\) kg/ms\(^2\) (round off to two decimal places).
[Use: \(d = 2\) m; \(\rho_{soil} = 2.0\) g/cm\(^3\); \(g = 9.8\) m/s\(^2\)]

Which one of the following mineral reactions will result in the formation of a diagnostic granulite facies assemblage during regional metamorphism of a pelite?

The given schematic diagram shows different stages of development of S\(_2\) foliation after the formation of S\(_1\) foliation. Which of the following statements CORRECTLY interpret(s) the relationships of porphyroblasts W, X, Y and Z with the matrix?

For a chemical system with 5 phases at the invariant point, the number of possible univariant reactions in pressure-temperature space is ____ (answer in integer).

The given table shows modal volume percentage of quartz, alkali feldspar and plagioclase in coarse-grained rocks, X and Y. Which of the following rock names of X and Y are CORRECT according to the IUGS classification?

The ternary diagram given below shows phase relations for the Anorthite-Diopside-Forsterite system at 1 bar pressure. Broken lines represent isotherms with temperature in °C. If 'P' is the initial melt composition, which one of the following is the CORRECT sequence of crystallization assuming equilibrium between crystal and melt?

Which of the following is/are diagnostic morphological feature(s) of brachiopods?

A mafic magma with 'Sr' concentration of 400 ppm has undergone 60% fractional crystallization. If 'Sr' is incompatible in the mineral assemblage that crystallizes from the magma with a bulk distribution coefficient of 0.2, the concentration of 'Sr' in the residual liquid is ppm (rounded off to nearest integer).

Which of the following biostratigraphic zones is/are depicted in the figure below?