Engineering Geology for Construction MCQs Questions & Answers

1

What is the most important geological consideration before constructing a dam?

A) Soil fertility B) Rock type and structure C) Surface vegetation D) Proximity to roads

Discuss

Answer & Solution

Answer: Option B

Solution:

Rock type and structure are crucial for dam stability.The strength, porosity, jointing, and permeability of rocks influence seepage and foundation behavior under load.

2

Which test is commonly used to determine rock strength for construction suitability?

A) Permeability test B) Schmidt hammer test C) Sieve analysis D) Vane shear test

Discuss

Answer & Solution

Answer: Option B

Solution:

The Schmidt hammer test provides an estimate of rock surface hardness and correlates it to unconfined compressive strength.It is fast and non-destructive.

3

What geological structure is most hazardous for tunnel construction?

A) Horizontal bedding B) Fault zone C) Anticline fold D) Massive granite

Discuss

Answer & Solution

Answer: Option B

Solution:

A fault zone consists of fractured, sheared, and weak rocks, increasing risk of collapse and water ingress in tunnels.They often act as water conduits.

4

The unconfined compressive strength of a rock is a measure of its:

A) Tensile strength B) Load-bearing capacity without lateral support C) Weathering rate D) Porosity

Discuss

Answer & Solution

Answer: Option B

Solution:

Unconfined compressive strength (UCS) measures a rock's ability to withstand axial load without lateral restraint.It is critical in foundation and tunnel design.

5

Why are clayey soils generally unsuitable for foundation construction?

A) They are too heavy B) They are expensive to remove C) They swell and shrink with moisture D) They are non-cohesive

Discuss

Answer & Solution

Answer: Option C

Solution:

Clayey soils have high plasticity and exhibit volume changes due to moisture variations, leading to uneven settlement and structural issues.

6

What is a suitable rock type for construction of road bases and high-strength structures?

A) Shale B) Granite C) Gypsum D) Marl

Discuss

Answer & Solution

Answer: Option B

Solution:

Granite is a hard, durable, and low-porosity rock suitable for road bases, bridges, and heavy construction.Its interlocking crystals offer high compressive strength.

7

Engineering geology helps in construction mainly by:

A) Predicting earthquakes B) Identifying mineral ores C) Evaluating site conditions D) Designing electrical layouts

Discuss

Answer & Solution

Answer: Option C

Solution:

Engineering geology assesses geological conditions for design and safety of structures like tunnels, dams, and roads.

8

Which factor is NOT a part of geological mapping for construction?

A) Lithology B) Structural geology C) Climate patterns D) Geomorphology

Discuss

Answer & Solution

Answer: Option C

Solution:

Climate patterns affect construction scheduling but are not part of geological mapping, which focuses on rock type, structure, and landforms.

9

What kind of slope is considered safest for hill road construction?

A) Very steep and convex B) Gentle and concave C) Vertical cliffs D) Irregular jagged slope

Discuss

Answer & Solution

Answer: Option B

Solution:

Gentle, concave slopes are stable and less prone to landslides, making them ideal for hill road construction.

10

During site selection for a dam, why is joint spacing in bedrock important?

A) Affects temperature variation B) Controls rock color C) Influences seepage and stability D) Determines vegetation type

Discuss

Answer & Solution

Answer: Option C

Solution:

Joint spacing controls rock permeability and mechanical strength.Closely spaced joints may increase water seepage and reduce foundation stability.

Engineering Geology for Construction MCQs Questions & Answers | Geological Engineering