Target GATE & ESE 2022 (Geotechnical Engineering)

 Q.1 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?

(a) 22.1             (b) 23.5              (c) 24.2                (d) 24.8

Q.2 On which of the following soils is the standard penetration test useful?

A.  Cohesionless soil               B. Medium clay

C. Gravelly soils                     D. Very stiff clays

Select the correct answer using the code given below

(a) A only                           (b) A and C 

(c) A and B                        (d) C and D

Q.3 The standard penetration resistance value obtained in a deep deposit of sand at a depth of 6 m was 28. The unit weight of sand is 18 kN/m^3. What is the corrected value of number of blows for overburden pressure?

(a) 60                                (b) 57

(c) 59                                (d) 55

Q.4 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 footing at shallow depths.

Which of the following statements are correct?

(a) 1,2 and 3                       (b) 1 and 2 only

(c) 2 and 3 only                  (d) 1 and 3 only

Q.5 During a sampling operation , the drive sampler is advanced 600 mm and the length of sample recovered is 525 mm. What is the recovery ratio of the sample?

(a) 0.125                         (b) 0.140

(c) 0.875                         (d) 0.143

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