Numerical Computation and Estimation - General Aptitude - General Aptitude (GA) Previous Year Questions

1

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

The reflection coefficient at the interface separating sandstone (\(V_p\) = 2000 ms⁻¹; \(\rho\) = 1.5 g cm⁻³) underlain by shale (\(V_p\) = 2500 ms⁻¹; \(\rho\) = 2.0 g cm⁻³) is ________

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2

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

On the Earth, all conditions being same, the time period of a simple pendulum will be maximum at the

A

Poles

B

Tropic of Cancer

C

Tropic of Capricorn

D

Equator

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3

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

If the total volume of water in the Earth's atmosphere, estimated to be about 1.29 x 10⁴ km³, were to completely precipitate and uniformly cover the Earth's surface, estimated to be 5.1 x 10⁸ km², the height of the resulting water column would be ________ cm.

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4

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

The frequency range (in Hz) that defines dead-band in magnetotelluric source signal is

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5

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

The minimum frequency at which a signal comprising of 30 Hz, 50 Hz and 70 Hz frequencies should be sampled to avoid aliasing is ________ Hz.

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6

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

The expression for electrical potential, \(V\), at a distance \(r\) from a subsurface point source of current in a homogeneous medium is given by

A

\(V = \frac{2\pi r \rho}{I}\)

B

\(V = \frac{\rho I}{4\pi r}\)

C

\(V = \frac{2\pi r I}{\rho}\)

D

\(V = \frac{r \rho}{4\pi I}\)

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7

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

In a 3-D seismic survey, the bin size for the maximum frequency ($f_{max}$) of 80 Hz at the target having a reflector dip of 15° and interval velocity of 3600 ms⁻¹ is __________.

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8

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

A spherical body with its centre located at a depth of 1040 m gives a symmetric residual gravity anomaly high with $\Delta g_{max}$ = 5.2 mGal. If the same anomaly were to be obtained over a 2-D horizontal cylinder, the depth to the centre of the horizontal cylinder (in m) is __________.

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9

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2015

Analysis of data from a 3-component broadband seismological station yields seismic velocities, $V_p$ = 7.0 km/s and $V_s$ = 3.87 km/s for the lower crust. The resulting Poisson's ratio of the lower crustal rocks (rounded to two decimal places) is

A

0.24

B

0.26

C

0.28

D

0.30

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10

2024 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2024 [Session 1]

On a given day, how many times will the second-hand and the minute-hand of a clock cross each other during the clock time 12:05:00 hours to 12:55:00 hours?

A

51

B

49

C

50

D

55

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11

2025 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology & Geophysics (GG) 2025 [Session 1]

Rohit goes to a restaurant for lunch at about 1 PM. When he enters the restaurant, he notices that the hour and minute hands on the wall clock are exactly coinciding. After about an hour, when he leaves the restaurant, he notices that the clock hands are again exactly coinciding. How much time (in minutes) did Rohit spend at the restaurant?

A

64 \(\frac{6}{11}\)

B

66 \(\frac{5}{13}\)

C

65 \(\frac{5}{11}\)

D

66 \(\frac{6}{13}\)

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12

2026 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Geology and Geophysics - Geology (GG) 2026

The 2^nd of June is a Thursday in a certain year. Which day of the week is the 3^rd of July in that year?

A

Thursday

B

Friday

C

Saturday

D

Sunday

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