Standard Penetration Test
Trending Questions
Q. The standard penetration resistance value obtained in a deep deposit of sand at a depth of 6.0 m was 28. The unit weight of sand is 18.0kN/m3. What is the corrected value of number of blows for overburden pressure?
- 60
- 57
- 59
- 55
Q. The width and depth of a footing are 2 and 1.5 m respectively. The water table at the site is at a depth of 3 m below the ground level. The water table correction factor for the calculation of the bearing capacity of soil is
0.875- 1.000
0.925- 0.500
Q. Standard penetration test (SPT) was conducted at a site. The recorded values of blow count for every 15 cm penetration at depth of 1 m are 5, 9 and 10 respectively. The water table was at the ground surface. The grain size classification showed that the size contained 40% fine sand and 60% silt. the value of SPT blow count(N) that should be used for overburden correction is ..........
- 19
Q. The number of blows observed in a standard penetration Test (SPT) for different penetrations depths are given as follows
penetration of sampler number of blows
The observed N value is
penetration of sampler number of blows
0 - 150 | 6 |
150 - 300 | 8 |
300 - 450 | 10 |
The observed N value is
8
14
18
24
Q. In standard penetration test, the split spoon sampler is penetrated into the soil stratum by giving blows from a drop weight whose weight (in kg) and free fall (in cm) are, respectively
- 30 and 60
- 60 and 30
- 65 and 75
- 75 and 65
Q. Consider the following statements:
The Standard Penetration Test (SPT) in soils is the most commonly used field test. SPT is used to determine
1. consistency of clay
2. undrained shear strength of soft sensitive clays
3. relative density of sands
4. drained shear strength of fine loose sand
Which of these statements are correct?
The Standard Penetration Test (SPT) in soils is the most commonly used field test. SPT is used to determine
1. consistency of clay
2. undrained shear strength of soft sensitive clays
3. relative density of sands
4. drained shear strength of fine loose sand
Which of these statements are correct?
- 1 and 2
- 2 and 4
- 1 and 3
- (c) 3 and 4
Q. The standard penetration resistance N of a granular deposit is found to be 20. The soil can be classified approximately in terms of ϕ and density index respectively as
- 20° and 10% for very loose condition
- 32° and 50% for medium condition
- 32° and 30% for loose condition
- 38° and 65% for dense condition
Q. During the surface investigations for design of foundation, a standard penetration test was conducted at 4.5 m below the ground surface. The record of number of blows is given below
Penetration depth(cm)Number of blows0−7.537.5−15315−22.5622.5−30630−37.5837.5−457
Assuming the water table at ground level, soil as fine sand and correction factor for overburden as 1.0, the corrected N value for the soil would be
Penetration depth(cm)Number of blows0−7.537.5−15315−22.5622.5−30630−37.5837.5−457
Assuming the water table at ground level, soil as fine sand and correction factor for overburden as 1.0, the corrected N value for the soil would be
- 18
- 19
- 21
- 33
Q. During the subsurface investigation for design of foundation a SPT test was conducted at 3 m below ground surface. The record number of blows are as given:
The water table is 2 m below ground surface. The correction factor for overburden is 1.2, the corrected N value for the soil will be:
Penetration depth | No. of blows |
0 -75 mm | 6 |
75 -150 mm | 7 |
150 -300 mm | 12 |
300 -450 mm | 13 |
The water table is 2 m below ground surface. The correction factor for overburden is 1.2, the corrected N value for the soil will be:
- 22
- 30
- 25
- 28
Q. In a soil investigation work at a site, Standard penetration test (SPT) was conducted at every 1.5m interval up to 30m depth. At 3 m depth, the observed number of hammer blows for three successive 150 mm penetration were 8, 6 and 9, respectively. The SPT N-value at 3 m depth, is
15
23
14
17
Q. Consider the following statements:
1. Standard penetration test is commonly used for cohesionless soils.
2. Standard penetration test results in respect of a cohesionless soil are correlated to its density index and friction angle.
3. Use of N-value not corrected for overburden pressure leads to highly conservative design of footings at shallow depths.
Which of these statements are correct?
1. Standard penetration test is commonly used for cohesionless soils.
2. Standard penetration test results in respect of a cohesionless soil are correlated to its density index and friction angle.
3. Use of N-value not corrected for overburden pressure leads to highly conservative design of footings at shallow depths.
Which of these statements are correct?
- 1, 2 and 3
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
Q. The observed value of the standard penetration number (N) at 10m depth of a silty sand deposit is 13. The unit weight of the soil is 16kN/m3. The N value after correcting for the presence of fines will be :
12
13
14
15
Q. Consider the following statements:
1. Standard penetration test (SPT) is conducted by pushing a cone into soil at the rate of 2 cm/s.
2. Standard penetration test results are unreliable in deposits containing large number of boulders.
3. Dutch cone is a static penetrometer.
Which of these statements is/are correct:
1. Standard penetration test (SPT) is conducted by pushing a cone into soil at the rate of 2 cm/s.
2. Standard penetration test results are unreliable in deposits containing large number of boulders.
3. Dutch cone is a static penetrometer.
Which of these statements is/are correct:
- 1 only
- 1 and 2
- 2 and 3
- 3 only
Q. Consider the following statements:
1. The standard penetration test is a reliable method for measuring the relative density of granular soils.
2. For a sand having the same relative density, N-values remain the same at all depths.
3. For a sand having the same relative density, N-values are different at different depths.
Which of these statements is/are correct?
1. The standard penetration test is a reliable method for measuring the relative density of granular soils.
2. For a sand having the same relative density, N-values remain the same at all depths.
3. For a sand having the same relative density, N-values are different at different depths.
Which of these statements is/are correct?
- 1, 2 and 3
- 1 and 3
- 3 only
- 1 and 3
Q. The observed N - value from a standard penetration test conducted in saturated sandy strata is 30; the N-value corrected for dilatancy may be taken as
- 18
- 23
- 28
- 36
Q. Consider the following statements:
1. Dynamic cone penetration test for site investigation is based on the principle that elastic shock waves travel in different materials at different velocities.
2. Electrical resistivity method of subsurface investigation is capable of detecting only the strata having different electrical resistivity.
3. In-situ vane shear test is useful, for determining the shear strength of very soft soil and sensitive clays and is unsuitable for sandy soil.
Which of these statements is/are correct ?
1. Dynamic cone penetration test for site investigation is based on the principle that elastic shock waves travel in different materials at different velocities.
2. Electrical resistivity method of subsurface investigation is capable of detecting only the strata having different electrical resistivity.
3. In-situ vane shear test is useful, for determining the shear strength of very soft soil and sensitive clays and is unsuitable for sandy soil.
Which of these statements is/are correct ?
- 1 and 2
- 1 and 3
- 2 and 3
- 2 alone
Q. Consider the following statements:
1. The proportioning of footing in sand is more often governed by settlement rather than by bearing capacity.
2. The pressure bulb profiles under a strip footing form as co-axially imaginable bulbs under its length.
3. Friction piles are also called floating piles.
Which of the above statements are correct?
1. The proportioning of footing in sand is more often governed by settlement rather than by bearing capacity.
2. The pressure bulb profiles under a strip footing form as co-axially imaginable bulbs under its length.
3. Friction piles are also called floating piles.
Which of the above statements are correct?
- 1, 2 and 3
- 1 and 2 only
- 1 and 3 only
- 2 and 3 only
Q. Match List-I (Field test) with List-II (Parameters measured) and select the correct answer using the codes given below the lists:
List-I
A. Plate Load Test
B. Standard Penetration Test
C. Static Dutch Cone Penetration Test
D. Dynamic Penetration Test
List-I I
1. Total and frictional resistances
2. Load intensity and settlement values
3. NCD values
4. SPT values
Codes:
A B C D
List-I
A. Plate Load Test
B. Standard Penetration Test
C. Static Dutch Cone Penetration Test
D. Dynamic Penetration Test
List-I I
1. Total and frictional resistances
2. Load intensity and settlement values
3. NCD values
4. SPT values
Codes:
A B C D
- 2 4 3 1
- 4 2 3 1
- 2 4 1 3
- 4 2 1 3
Q. If an SPT test gave the average blow count of 32 in fine sand below water table, then what is the corrected value of blow count ?
- 22.1
- 23.5
- 24.2
- 24.8
Q. Consider the following statements in respect of static cone penetration test:
1. The cone used has an apex angle of 60° and base area of 10cm2.
2. This test give a continuous record of cone resistance.
Which of these statements is/are correct?
1. The cone used has an apex angle of 60° and base area of 10cm2.
2. This test give a continuous record of cone resistance.
Which of these statements is/are correct?
- 1 only
- 2 only
- Both 1 and 2
- neither 1 nor 2
Q. Match
List - II (Field test) with List - II (Suitability) and select the correct answer using the codes given below the lists :
List - I
A. Plate load test
B. Standard penetration test
C. Vane shear test
D. Dilatancy test
List - II
1. To estimate bearing capacity of granular soil
2. To estimate in-situ strength of soft clay
3. To identity silt from clay
4. To estimate bearing capacity for permissible settlement in clays
Codes :
A B C D
List - II (Field test) with List - II (Suitability) and select the correct answer using the codes given below the lists :
List - I
A. Plate load test
B. Standard penetration test
C. Vane shear test
D. Dilatancy test
List - II
1. To estimate bearing capacity of granular soil
2. To estimate in-situ strength of soft clay
3. To identity silt from clay
4. To estimate bearing capacity for permissible settlement in clays
Codes :
A B C D
- 4 3 2 1
- 2 1 4 3
- 4 1 2 3
- 2 3 4 1
Q. On which of the following soils is the standard penetration test useful?
1. Cohesionless soils
2. Medium clays
3. Gravelly soils
4. Very stiff clays
Select the correct answer using the codes given below:
1. Cohesionless soils
2. Medium clays
3. Gravelly soils
4. Very stiff clays
Select the correct answer using the codes given below:
- 1 only
- 1 and 3
- 1 and 2
- 3 and 4
Q. Assertion (A): Estimation of settlement of foundations on sandy soils can be done by using SPT values.
Reason (R): Sampling in cohesionless soils without disturbing the structure is difficult.
Reason (R): Sampling in cohesionless soils without disturbing the structure is difficult.
- both A and R are true and R is the correct explanation of A
- both A and R are true but R is not a correct explanation of A
- A is true but R is false
- A is false but R is true
Q. Assertion (A): In the case of sand deposits with uniform density, N values are found to increase with depth.
Reason (R): Overburden pressure increases with depth below ground level.
Reason (R): Overburden pressure increases with depth below ground level.
- both A and R are true and R is the correct explanation of A
- both A and R are true but R is not a correct explanation of A
- A is true but R is false
- A is false but R is true
Q. A standard penetration test was conducted at a site 12 m below the earth's surface. The observed SPT number was 26. The water table is at the ground surface, the soil investigation shows specific gravity of solids to be 2.65 and void ratio to be 0.60. The final SPT number is ?
- 20
- 23
- 31
- 41
Q. Which one of the following states of field compaction of sand deposit truly represents the corrected standard penetration test value: N (corrected) = 27?
- Loose
- Medium dense
- Dense
- very dense
Q. If the actual observed value of standard penetration resistance, N, is greater than 15 in a fine sand layer below water table, then the equivalent penetration resistance will be
- 15+(N+152)
- 15−(N+152)
- 15+(N−152)
- 15+(15−N2)
Q. The observed N - value from a standard penetration test conducted in saturated sandy strata is 30 ; the N- value corrected for dilatancy may be taken as
- 15
- 20
- 23
- 39
Q. Match List-I (In-situ test) with List-II (Measurement) and select the correct answer using the codes given below the lists:
List -I
A. SPT test
B. Plate load test
C. Field vane shear test
D. CPT test
List - II
1. Penetration resistance (N value)
2. Load settlement data
3. Point resistance and skin friction
4. In situ shear strength
Codes :
A B C D
List -I
A. SPT test
B. Plate load test
C. Field vane shear test
D. CPT test
List - II
1. Penetration resistance (N value)
2. Load settlement data
3. Point resistance and skin friction
4. In situ shear strength
Codes :
A B C D
- 1 2 4 3
- 1 2 3 4
- 2 1 3 4
- 2 1 4 3
Q. Match List-I (In-situ test) with List-II (Measurement) and select the correct answer using the codes given below the lists:
List -I
A. SPT test
B. Plate load test
C. Field vane shear test
D. CPT test
List - II
1. Penetration resistance (N value)
2. Load settlement data
3. Point resistance and skin friction
4. In situ shear strength
Codes :
A B C D
List -I
A. SPT test
B. Plate load test
C. Field vane shear test
D. CPT test
List - II
1. Penetration resistance (N value)
2. Load settlement data
3. Point resistance and skin friction
4. In situ shear strength
Codes :
A B C D
- 1 2 4 3
- 1 2 3 4
- 2 1 3 4
- 2 1 4 3