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Assistant Director (Geologist) Complete Preparation Guide & Solved Questions (2026) - Apex Rankers

BPSC Recruitment Examination Syllabus & Question Bank

3827 Total Questions
~5741 mins Read Time
3 Subject Areas
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Q. 1 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
The boundary separating the Earth's crust from the underlying mantle is the:
A
Conrad Discontinuity
B
Mohorovičić Discontinuity (Moho)
✓ Correct
C
Gutenberg Discontinuity
D
Lehmann Discontinuity
💡 Step-by-Step Explanation & Concept Rationale
The Moho marks a sharp seismic velocity jump between crust and mantle rocks.
Q. 2 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
The collision between the Indian Plate and the Eurasian Plate formed the:
A
Appalachian Mountains
B
Himalayas and Karakoram mountain ranges
✓ Correct
C
Andes Mountains
D
Urals
💡 Step-by-Step Explanation & Concept Rationale
Continental collision starting ~50 million years ago created the Himalayan orogeny.
Q. 3 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
A geological fold where rock strata are arched upward with oldest rocks at the core is an:
A
Graben
B
Syncline
C
Monocline
D
Anticline
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Anticlines form convex-upward arches that frequently act as hydrocarbon traps.
Q. 4 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Mohs scale of mineral hardness assigns a hardness of 10 to:
A
Diamond
✓ Correct
B
Topaz (8)
C
Quartz (7)
D
Corundum (9)
💡 Step-by-Step Explanation & Concept Rationale
Diamond possesses the maximum scratch resistance on Mohs empirical scale.
Q. 5 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Which rock type is formed by the cooling and solidification of molten magma beneath Earth's surface?
A
Sedimentary Limestone
B
Intrusive Igneous rock (e.g. Granite)
✓ Correct
C
Metamorphic Schist
D
Extrusive Basalt
💡 Step-by-Step Explanation & Concept Rationale
Slow plutonic cooling allows large crystalline mineral grains to develop in granite.
Q. 6 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
In professional practice: The boundary separating the Earth's crust from the underlying mantle is the:
A
Lehmann Discontinuity
B
Gutenberg Discontinuity
C
Mohorovičić Discontinuity (Moho)
✓ Correct
D
Conrad Discontinuity
💡 Step-by-Step Explanation & Concept Rationale
The Moho marks a sharp seismic velocity jump between crust and mantle rocks.
Q. 7 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
In professional practice: The collision between the Indian Plate and the Eurasian Plate formed the:
A
Andes Mountains
B
Appalachian Mountains
C
Himalayas and Karakoram mountain ranges
✓ Correct
D
Urals
💡 Step-by-Step Explanation & Concept Rationale
Continental collision starting ~50 million years ago created the Himalayan orogeny.
Q. 8 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
In professional practice: A geological fold where rock strata are arched upward with oldest rocks at the core is an:
A
Syncline
B
Graben
C
Anticline
✓ Correct
D
Monocline
💡 Step-by-Step Explanation & Concept Rationale
Anticlines form convex-upward arches that frequently act as hydrocarbon traps.
Q. 9 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
In professional practice: Mohs scale of mineral hardness assigns a hardness of 10 to:
A
Topaz (8)
B
Quartz (7)
C
Diamond
✓ Correct
D
Corundum (9)
💡 Step-by-Step Explanation & Concept Rationale
Diamond possesses the maximum scratch resistance on Mohs empirical scale.
Q. 10 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
In professional practice: Which rock type is formed by the cooling and solidification of molten magma beneath Earth's surface?
A
Intrusive Igneous rock (e.g. Granite)
✓ Correct
B
Metamorphic Schist
C
Sedimentary Limestone
D
Extrusive Basalt
💡 Step-by-Step Explanation & Concept Rationale
Slow plutonic cooling allows large crystalline mineral grains to develop in granite.
Q. 11 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
According to standard examination standards: The boundary separating the Earth's crust from the underlying mantle is the:
A
Lehmann Discontinuity
B
Mohorovičić Discontinuity (Moho)
✓ Correct
C
Gutenberg Discontinuity
D
Conrad Discontinuity
💡 Step-by-Step Explanation & Concept Rationale
The Moho marks a sharp seismic velocity jump between crust and mantle rocks.
Q. 12 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
According to standard examination standards: The collision between the Indian Plate and the Eurasian Plate formed the:
A
Andes Mountains
B
Himalayas and Karakoram mountain ranges
✓ Correct
C
Urals
D
Appalachian Mountains
💡 Step-by-Step Explanation & Concept Rationale
Continental collision starting ~50 million years ago created the Himalayan orogeny.
Q. 13 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
According to standard examination standards: A geological fold where rock strata are arched upward with oldest rocks at the core is an:
A
Syncline
B
Graben
C
Monocline
D
Anticline
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Anticlines form convex-upward arches that frequently act as hydrocarbon traps.
Q. 14 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
According to standard examination standards: Mohs scale of mineral hardness assigns a hardness of 10 to:
A
Corundum (9)
B
Quartz (7)
C
Topaz (8)
D
Diamond
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Diamond possesses the maximum scratch resistance on Mohs empirical scale.
Q. 15 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
According to standard examination standards: Which rock type is formed by the cooling and solidification of molten magma beneath Earth's surface?
A
Sedimentary Limestone
B
Intrusive Igneous rock (e.g. Granite)
✓ Correct
C
Metamorphic Schist
D
Extrusive Basalt
💡 Step-by-Step Explanation & Concept Rationale
Slow plutonic cooling allows large crystalline mineral grains to develop in granite.
Q. 16 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
From an applied perspective: The boundary separating the Earth's crust from the underlying mantle is the:
A
Lehmann Discontinuity
B
Gutenberg Discontinuity
C
Conrad Discontinuity
D
Mohorovičić Discontinuity (Moho)
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
The Moho marks a sharp seismic velocity jump between crust and mantle rocks.
Q. 17 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
From an applied perspective: The collision between the Indian Plate and the Eurasian Plate formed the:
A
Appalachian Mountains
B
Himalayas and Karakoram mountain ranges
✓ Correct
C
Urals
D
Andes Mountains
💡 Step-by-Step Explanation & Concept Rationale
Continental collision starting ~50 million years ago created the Himalayan orogeny.
Q. 18 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
From an applied perspective: A geological fold where rock strata are arched upward with oldest rocks at the core is an:
A
Monocline
B
Anticline
✓ Correct
C
Graben
D
Syncline
💡 Step-by-Step Explanation & Concept Rationale
Anticlines form convex-upward arches that frequently act as hydrocarbon traps.
Q. 19 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
From an applied perspective: Mohs scale of mineral hardness assigns a hardness of 10 to:
A
Diamond
✓ Correct
B
Quartz (7)
C
Corundum (9)
D
Topaz (8)
💡 Step-by-Step Explanation & Concept Rationale
Diamond possesses the maximum scratch resistance on Mohs empirical scale.
Q. 20 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
From an applied perspective: Which rock type is formed by the cooling and solidification of molten magma beneath Earth's surface?
A
Metamorphic Schist
B
Intrusive Igneous rock (e.g. Granite)
✓ Correct
C
Extrusive Basalt
D
Sedimentary Limestone
💡 Step-by-Step Explanation & Concept Rationale
Slow plutonic cooling allows large crystalline mineral grains to develop in granite.
Q. 21 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Under standard operational protocols: The boundary separating the Earth's crust from the underlying mantle is the:
A
Gutenberg Discontinuity
B
Mohorovičić Discontinuity (Moho)
✓ Correct
C
Conrad Discontinuity
D
Lehmann Discontinuity
💡 Step-by-Step Explanation & Concept Rationale
The Moho marks a sharp seismic velocity jump between crust and mantle rocks.
Q. 22 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Under standard operational protocols: The collision between the Indian Plate and the Eurasian Plate formed the:
A
Andes Mountains
B
Himalayas and Karakoram mountain ranges
✓ Correct
C
Urals
D
Appalachian Mountains
💡 Step-by-Step Explanation & Concept Rationale
Continental collision starting ~50 million years ago created the Himalayan orogeny.
Q. 23 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Under standard operational protocols: A geological fold where rock strata are arched upward with oldest rocks at the core is an:
A
Monocline
B
Graben
C
Syncline
D
Anticline
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Anticlines form convex-upward arches that frequently act as hydrocarbon traps.
Q. 24 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Under standard operational protocols: Mohs scale of mineral hardness assigns a hardness of 10 to:
A
Topaz (8)
B
Diamond
✓ Correct
C
Quartz (7)
D
Corundum (9)
💡 Step-by-Step Explanation & Concept Rationale
Diamond possesses the maximum scratch resistance on Mohs empirical scale.
Q. 25 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Under standard operational protocols: Which rock type is formed by the cooling and solidification of molten magma beneath Earth's surface?
A
Extrusive Basalt
B
Intrusive Igneous rock (e.g. Granite)
✓ Correct
C
Sedimentary Limestone
D
Metamorphic Schist
💡 Step-by-Step Explanation & Concept Rationale
Slow plutonic cooling allows large crystalline mineral grains to develop in granite.
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