Types of Foundation

Q. A foundation is considered as shallow if its depth is

1. Less than 1 meter
2. Greater than its width
3. Equal to or less than its width
4. Greater than 1 meter

Q. As per IS : 1904 - 1986 the permissible angular distortion with respect to steel structures in isolated foundations resting on plastic clay is

1. $\frac{2}{3000}$
2. $\frac{1}{3000}$
3. $\frac{1}{300}$
4. $\frac{2}{300}$

Q. The width of a square footing and the diameter of a circular footing are equal. If both the footings are placed on the surface of sandy soil, the ratio of the ultimate bearing capacity of circular footing to that of square footing will be

1. 
   $$\frac{4}{3}$$
2. 
   1
3. 
   $$\frac{3}{4}$$
4. $$\frac{2}{3}$$

Q. A soil has a low allowable bearing capacity. The soil deposit contains compressible loess. A foundation is to be provided for a structure carrying a heavy load. Which one of the following foundation types is to be adpoted ?

1. Strap footing
2. Continuous footing
3. Raft foundation
4. Combined spread foundation

Q. The nature of contact pressure distribution under a rigid footing resting on a sandy soil and subjected to uniformly distributed load is as shown in:

1. 
2. 
3. 
4. 

Q. Match List-I (Type of pile) with List-II (Situation for use) and select the correct answer using the codes given below the lists:

List-I
A. End bearing pile
B. Pedestal pile
C. Friction pile
D. Sand piles

List-II

1. When weak foundation soil is to be compacted.
2. When foundation soil is granular
3. When foundation soil relatively weak
4. When hard formation or rock is at a shallow depth.

Codes :

A B C D

1. 4 2 3 1
2. 1 3 2 4
3. 4 3 2 1
4. 1 2 3 4

Q. Match List-I (Type of strata below foundation) with List-II (Type of foundation movement) and select the correct answer using the codes given below the lists:
List-I
A. Sand
B. Heterogeneous landfill
C. Black cotton soil
D. Hard rock

List - II
1, practically no movements
2. Immediate settlements
3. Large relative settlements
4. Heaving of foundations

Codes :


A B C D

1. 2 3 1 4
2. 2 3 4 1
3. 3 2 1 4
4. 3 2 4 1

Q. For a proposed building, raft foundation, isolated footings and combined footings are being considered. These foundations are to be listed in the decreasing order of preference in terms of performance. Which one of the following is the correct order of listing?

1. Raft foundation - Combined footings -Isolated footings
2. Isolated footings - Raft foundation -Combined footings
3. Combined footings - Raft foundation - Isolated footings
4. Combined footings - Isolated footing - Raft foundation

Q. Match List-I (Type of soil) with List-II (Suitable foundation) and select the correct answer using the codes given below the lists:

List-I
A. Strong soil in surface layer
B. Weak surface layer followed by rock at shallow depth below ground
C. Swelling soil in surface layer extending up to a few meters below ground level
D. Weak heterogenous surface soil layer

List-II

1. Raft foundaiton
2. Isolated footing
3. End bearing pile
4. Under-reamed piles

Codes :

A B C D

1. 1 4 3 2
2. 2 3 4 1
3. 1 3 4 2
4. 2 4 3 1

Q. Directions: The following items consists of two statements; one labelled as 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Assertion (A): Raft foundations are the best type of shallow foundations to support heavy structures.

Reason (R): Raft foundations has the ability to redistribute load coming on weak pockets of soil below raft to the adjacent soils where the stresses are less severe for the soil at that place. This reduces the chances of differential settlements and increases the bearing capacity.

Codes:

1. both A and R are true and R is the correct explanation of A
2. both A and R are true but R is not a correct explanation of A
3. A is true but R is false
4. A is false but R is true