Plate Load Test

Q. A raft foundation is to be constructed on a sandy soil. The maximum differential settlement and limiting maximum settlement as recommended by Indian standard code are :

Max. differential Limiting max.
settlement settlement

1. 40mm 65mm to 10mm
2. 40 mm 40mm to 65 mm
3. 25mm 65mm to 100mm
4. 25mm 40mm to 65mm

Q. When a load test was conducted by putting a 60 cm square plate on top of a sandy deposit, the ultimate bearing capacity was observed as $60kN/m^2$. What is the ultimate bearing capacity for a strip footing of 1.2 m width to be placed on the surface of the same soil?

1. $75kN/m^2$
2. $120kN./m^2$
3. $150kN/m^2$
4. $160kN/m^2$

Q. In a plate load test conducted on cohesionless soil, a 600 mm square test plate settles by 15 mm under a load intensity of $0.2N/m{m}^2.$ All conditions remaining the same, settlement of a 1 m square footing will be

1. 
   Less than 15mm
2. 
   Greater than 25mm
3. 
   15.60 mm
4. 
   20.50mm

Q. A plate load test was conducted in sand on a 300 mm diameter plate. If the plate settlement was 5 mm at a pressure of 100 kPa, the settlement (in mm) of a 5 m $\times$ 8 m rectangular footing at the same pressure will be

1. 9.4
2. 18.6
3. 12.7
4. 17.8

Q. A plate load test is carried out on a 300 mm $\times$ 300 mm plate placed at 2 m below the ground level to determine the bearing capacity of a 2 m $\times$ 2 m footing placed at same depth of 2 m on a homogeneous sand deposit extending 10 m below ground. The ground water table is 3 m below the ground level. Which of the following factors does not require a correction to the bearing capacity determined based on the load test?

1. Absence of the overburden pressure during the test

2. Size of the plate is much smaller than the footing size
   
3. influence of the ground water table
4. settlement is recorded only over a limited period of one or two days

Q. A test plate 30 cm square, settles by 12 mm under a load of 4.5 kN in a sandy soil. By how much will a footing $2m\times 2m$ subjected to a load of 200 kN settle?

1. 36.3 mm
2. 20.87 mm
3. 75.75 mm
4. 18.15 mm

Q. A plate load test was conducted by using a 60 cm square plate on the top of a sandy deposit, the ultimate bearing capacity was observed as $55kN/m^2.$ What will be the ultimate bearing capacity for a strip footing of 1.2 m width to be placed on the surface of the same soil?

1. $79kN/m^2$
2. $88kN/m^2$
3. $110kN/m^2$
4. $124kN/m^2$

Q. Consider the following statements:
Increasing width of footing results in
1. increase in settlement of a consolidating clay layer
2. Increase in bearing capacity of sandy soils
3. decrease in bearing capacity of clays
Which of these statements is/are correct?

1. 1 only
2. 1 and 2 only
3. 2 and 3 only
4. 1, 2 and 3

Q. The results of two plate load tests for a settlement of 25 mm are given below:

Plate diameter	Load
0.3 m 0.6 m	30 kN 70 kN

What will be the size of square footing designed to carry a load of 900 kN as per Housel method ?

1. 2.4 m
2. 2.7 m
3. 3 m
4. 2.9 m

Q. A test plate 30 cm $\times$ 30 cm resting on a sand deposit settles by 10 mm under a certain loading intensity. A footing 150 cm $\times$ 200 cm resting on the same sand deposit and loaded the same load intensity settles by

1. 2.0 mm
2. 27.8 mm
3. 3.02 mm
4. 50.0 mm

Q. In a plate load test on sandy soil, the test plate of 60 cm $\times$ 60 cm undergoes a settlement of 5mm at a pressure of $12\times {10}^{4}N/m^2$. What will be the expected settlement of $3m\times 3m$ footing under same pressure ?

1. 25mm
2. 20mm
3. 15mm
4. 9mm

Q. A soil sampler has inner and outer radius of 26 mm and 30 mm respectively. The area ratio of the sampler is ?
(Rounded upto two decimal places).

1. 28.15 %
2. 33.14 %
3. 2.06 %
4. 42.19 %

Q. The plate load test was conducted on a clayey strata by using a plate of $0.3m\times 0.3m$ dimensions, and the ultimate load per unit area for the plate was found to be 180 kPa. The ultimate bearing capacity (in kPa) of a 2m wide square footing would be

1. 
   27
2. 
   180
3. 
   1200
4. 
   2000

Q. Examine the test arrangement and the soil properties given below

${\gamma }_{sat}$ = 18 kN/ $m^3$
$\varphi$ = ${35}^o$
c = 0 kPa
${\gamma }_w$ = 10 kN/$m^3$
$N_{\gamma }$ = 40
Angle of friction, ($\delta$) = ${24}^o$
Earth pressure cofficient, (K) = 1.5


The maximum pressure that can be applied with a factor a safety of 3 through the concrete block, ensuring no bearing capacity failure in soil using Terzaghi's bearing capacity equation without considering the shape factor, depth factor and inclination factor is

1. 26.67 kPa
2. 60kPa
3. 90 kPa
4. 120 kPa

Q. In a plate load test, how is the ultimate load estimated from the load settlement curve on a log-log graph?

1. Directly
2. By drawing tangents to the curve at the initial and final points
3. By the secant method
4. At 0.2 per cent of the maximum settlement

Q. A plate load test is conducted on a cohesionless soil using a plate of size $0.6m\times 0.6m$. The settlement of the plate corresponding to ultimate load is 25 mm. What will be the settlement of footing of square shape having 3m dimension on the same soil at same load intensity?

1. 125 mm
2. 33.3 mm
3. 46.5 mm
4. 14.8 mm

Q. If water table is encountered in the standard pit while conducting plate load test

1. The load test should be abandoned
2. The pit is considered unsafe
3. Test should be conducted with complete dewatering continuously throughout the test duration.
4. The bearing capacity of soil cannot be determined in this condition
   

Q. Consider the following statement
1. The ultimate bearing capacity of a footing on sand increase.
2. The settlement of the footing on sand increases with increase in its width.
Which of the above statements are correct?

1. 1 only
2. Both 1 and 2
3. 2 only
4. Neither 1 nor 2

Q. Examine the test arrangement and the soil properties given below

${\gamma }_{sat}$ = 18 kN/ $m^3$
$\varphi$ = ${35}^o$
c = 0 kPa
${\gamma }_w$ = 10 kN/$m^3$
$N_{\gamma }$ = 40
Angle of friction, ($\delta$) = ${24}^o$
Earth pressure cofficient, (K) = 1.5

The maximum resistance offered by the soil through skin friction while pulling out pile from the ground is

1. 104.9 kN
2. 209.8 kN
3. 236 kN
4. 472 kN

Q. The settlement of prototype in clayey material may be estimated using plate load test data from the following expression:

1. $S_{\text{prototype}}=S_{\text{plate}}\times \left(\frac{B_{\text{prototype}}}{B_{\text{plate}}}\right)$
2. $S_{\text{prototype}}=S_{\text{plate}}\times \left(\frac{B_{\text{plate}}}{B_{\text{prototype}}}\right)$
3. $S_{\text{prototype}}=S_{\text{plate}}\times {\left[\frac{2B_{\text{prototype}}}{B_{\text{prototype}}+B_{\text{plate}}}\right]}^2$
4. $S_{\text{prototype}}=S_{\text{plate}}\times {\left[\frac{B_{prototype}+B_{plate}}{2B_{\text{prototype}}}\right]}^2$

Q. In a plate load test on a soil, at a particular magnitudes of the settlement, it was observed that the bearing pressure beneath the footing is $100kN/m^2$ and the perimeter shear is $25kN/m^2$. Correspondingly, the load capacity of a 2 m square footing at the same settlement will be

1. 200kN
2. 300kN
3. 400kN
4. 600kN

Q. Assertion (A): Foundation on expansive soils must be designed for as high a bearing pressure as possible consistent with the bearing capacity and settlement requirement.
Reason (R): Lightly loaded single and two storeyed buildings experience maximum damage when built on expansive soils.

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

Q. A plate load test is conducted on a cohesionless soil with a test plate having width $B_p\left(cm\right)$ and settlement of this plate $S_p\left(cm\right)$ is obtained at the same load intensity as a foundation. A footing having a width $B_f\left(cm\right)$ is to be constructed as foundation. What is the settlement $S_f\left(cm\right)$ experienced by this footing?

1. $S_f=S_p\left\{\right[B_f(B_P+30)\left]/\right[B_p(B_f+30)]{\}}^2$
2. $S_f=S_p\left\{\right[B_p(B_f+30)\left]/\right[B_f(B_p+30)]{\}}^2$
3. $S_f=S_p\left[B_f/B_p\right]$
4. $S_f=S_p\left[B_p/B_f\right]$

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): Plate load test carried out at the site gives field test data which is useful in evaluation of bearing capacity and settlements. It is normally conducted at the level of the proposed foundation.
Reason (R): Plate load test is reliable because it reflects the true behaviour of foundation stratum below the proposed level of foundation and extending up to large depth below.

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

Q. Match List - I (Field test ) with List - II (Property) and select the correct answer using the codes given below the lists :

List :I
A. Pumping test
B. Plate load test
C. pile load text

List - II
1. Bearing capacity
2. Load carrying capacity
3. Permeability

Codes :

A B C

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

Q. Match List-I (Test) with List-II (Utility) and select the correct answer using the codes given below the lists:
List - I
A. Field density test
B. Plate load test
C. CBR
List - II
1. Stress deformation characteristics
2. Compaction characteristics
3. Design of pavement
4. Safe load bearing capacity of soil
Codes:
A B C

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

Q. Which of the following statement(s) is/are 'INCORRECT'?

1. Clayey soil rich in montmorillonite exhibits very low swelling characteristics.

2. Larger N-value indicates the larger angle of friction in cohesionless soil.

3. Plate load test is a site test to determine the ultimate bearing capacity of cohesionless soil only

1. 1 only
2. 1 and 3
3. 2 only
4. 2 and 3

Q. Match List-I (Equipments) with List - II (Use) and select the correct answer using the codes given below the lists:
List-I
A. Hydrometer
B. Plate load test set up
C. Pycnometer
D. Direct shear apparatus
List-II
1. Determination of shear parameters
2. Determination of specific gravity
3. Determination of bearing capacity of soils
4. Grain size distribution tests for clays
Codes:
A B C D

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

Q. In the plate load test, if the break on the log-log plot between the load intensity q and settlement is not well defined, the ultimate load is taken corresponding to a settlement of:

1. $\frac{1}{3}\text{rd of the plate width}$
2. $\frac{1}{4}\text{th of the plate width}$
3. $\frac{1}{5}\text{th of the plate width}$
4. $\frac{1}{6}\text{th of the plate width}$