Foundation Engineering is an important subject in civil engineering covering soil investigation, bearing capacity, settlement, shallow foundations, deep foundations, piles, and related topics.

Below is a sample question paper suitable for civil engineering students and interview/exam preparation.

FOUNDATION ENGINEERING – SAMPLE QUESTION PAPER

Subject: Foundation Engineering
Time: 3 Hours
Maximum Marks: 100

Instructions

Answer all questions in Section A.
Answer any five questions from Section B.
Answer any two questions from Section C.
Assume suitable data wherever necessary and clearly state your assumptions.
Use relevant IS/BS/other applicable standards where required.

SECTION A – Short Answer Questions

10 × 2 = 20 Marks

Answer all questions.

1. What is a foundation?

2. What is the difference between shallow and deep foundations?

3. Define ultimate bearing capacity.

4. What is safe bearing capacity?

5. What is allowable bearing pressure?

6. Define settlement of foundation.

7. What is differential settlement?

8. What is a pile foundation?

9. What is soil investigation?

10. What is the Standard Penetration Test (SPT)?

SECTION B – Short/Descriptive Questions

5 × 8 = 40 Marks

Answer any five.

11. Explain the functions and requirements of a good foundation.

12. Explain the different types of shallow foundations with sketches.

13. Explain the factors affecting the bearing capacity of soil.

14. Describe the Standard Penetration Test (SPT) and explain its applications.

15. Explain the different types of settlement in foundations.

16. Explain the construction procedure of a reinforced-concrete isolated footing.

17. Explain the difference between isolated, combined, strap, and raft foundations.

18. Explain the different types of pile foundations based on their function.

SECTION C – Long Answer / Numerical Questions

2 × 20 = 40 Marks

Answer any two.

19. Bearing Capacity

A square footing is proposed at a certain depth below ground level.

Given:

Width of footing = 2.0 m
Depth of foundation = 1.5 m
Unit weight of soil = 18 kN/m³
Cohesion = 20 kN/m²
Angle of internal friction = 30°

Using an appropriate bearing-capacity theory, determine the ultimate and allowable bearing capacity.

Clearly state the factors and assumptions used.

20. Settlement of Foundation

Explain the different components of foundation settlement.

Discuss:

Immediate settlement
Primary consolidation settlement
Secondary compression

Explain how excessive settlement can affect a building.

21. Pile Foundation

Explain the design principles and construction procedure of a pile foundation.

Discuss:

End-bearing piles
Friction piles
Load transfer mechanism
Pile group
Pile cap
Pile load testing

22. Soil Investigation

Explain the complete procedure for a foundation soil investigation.

Your answer should cover:

Preliminary investigation
Site reconnaissance
Boreholes
Sampling
In-situ testing
Laboratory testing
Groundwater investigation
Soil profile preparation
Foundation recommendations

Important Foundation Engineering Questions

For students preparing for examinations or interviews, these are particularly important:

Basic Concepts

What is a foundation?
Why is a foundation required?
What are the functions of foundations?
What is shallow foundation?
What is deep foundation?
What is bearing capacity?
What is settlement?
What is differential settlement?

Shallow Foundations

What is an isolated footing?
What is a combined footing?
What is a strap footing?
What is a raft foundation?
When is a raft foundation preferred?
What factors affect footing size?

Deep Foundations

What is a pile foundation?
What is a pile cap?
What is a pile group?
What is an end-bearing pile?
What is a friction pile?
What is a bored pile?
What is a driven pile?

Soil Investigation

What is SPT?
What is CPT?
Why is soil investigation required?
What is a borehole?
What is disturbed sampling?
What is undisturbed sampling?
How is groundwater level determined?

Bearing Capacity

What is ultimate bearing capacity?
What is net ultimate bearing capacity?
What is safe bearing capacity?
What is allowable bearing pressure?
What factors affect bearing capacity?
What is the effect of groundwater on bearing capacity?

Settlement

What is immediate settlement?
What is consolidation settlement?
What is secondary settlement?
What is differential settlement?
How can excessive settlement be controlled?

Foundation Engineering – Quick Revision

Topic	Key Point
Foundation	Transfers structural loads to soil
Shallow foundation	Transfers load at relatively shallow depth
Deep foundation	Transfers load through deeper soil/rock
Bearing capacity	Soil's capacity to support foundation loads
Settlement	Downward movement of foundation/soil
Differential settlement	Unequal settlement between parts of a structure
SPT	In-situ soil resistance test
Pile	Deep foundation member
Pile cap	Connects pile group to the supported structure
Raft	Large foundation supporting several columns/walls

Foundation Engineering – Sample Viva Questions

Q: Why is soil investigation necessary?
A: To determine subsurface conditions and obtain information required for safe and economical foundation design.

Q: Which is better, shallow or deep foundation?
A: Neither is universally better. The appropriate foundation depends on soil conditions, loads, groundwater, settlement requirements, site constraints, and project economics.

Q: What causes differential settlement?
A: Differences in soil conditions, foundation loading, foundation dimensions, groundwater conditions, construction sequence, or variations in soil stiffness can contribute to differential settlement.

Q: What is the purpose of a pile cap?
A: A pile cap connects a group of piles and transfers structural loads from the supported member into the pile group.

Q: Why are piles used?
A: Piles may be used when near-surface soils cannot safely or economically support the required loads, or when settlement, uplift, lateral loads, or other site conditions make deep foundations appropriate.

Foundation Engineering Question Paper – Sample