GATE (Graduate Aptitude Test in Engineering) Geology & Geophysics: Questions 139 - 142 of 158

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Question 139

Question

MCQ▾

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?

Choices

Choice (4)Response

a.

Tetragonal

b.

Orthorhombic

c.

Hexagonal

d.

Monoclinic

Question 140

Digital Processing of Satellite Images
Edit

Appeared in Year: 2013

Write in Short

Short Answer▾

On a 1: 10,000 scale map, the length of a fault trace on a horizontal plane is represented as 5 cm. The same on a 1: 25,000 scale vertical aerial photograph is ________ cm.

Question 141

Multispectral Remote Sensing in Visible

Appeared in Year: 2014

Question

MCQ▾

A geological reconnaissance survey is being carried out using remote sensing multispectral data. Which set of the two band data of the following is most appropriate for mapping limonite bearing zones? (Carry two marks each)

Choices

Choice (4)Response

a.

Near infrared band and Thermal infrared band image data

b.

Shortwave infrared band and Thermal infrared image data

c.

Blue band and Red band image data

d.

Thermal infrared band and X-band radar image data

Question 142

Question

MCQ▾

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.

Choices

Choice (4)Response

a.

4

b.

2

c.

1

d.

3

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