This set of Highway Engineering Questions and Answers for Campus interviews focuses on “Structural Evaluation of Flexible Pavements and Strengthening by Overlay – 3”.

1. The deflection value D is obtained from multiplying the difference of initial and final gauge difference of ___________

a) 1

b) 2

c) 3

d) 4

View Answer

Explanation: The deflection value D is given by D=2(Do-Df).

2. The difference between initial and final deflection should not exceed ____ mm, for no leg correction value.

a) 0.02

b) 0.025

c) 0.050

d) 0.075

View Answer

Explanation: The difference between the initial and final deflection should not exceed 0.025m or 2.5 division.

3. The statistical analysis of data doesn’t require ___________

a) Mean deflection

b) Standard deviation

c) Characteristics deflection

d) Settlement

View Answer

Explanation: The statistical analysis of data requires mean deflection, characteristics deflection and standard deviation.

4. The characteristics deflection value is ___________

a) Dm+s

b) Dm-s

c) Dm-s

d) Dm/s

View Answer

Explanation: The characteristics deflection is given by Dm+s, where Dm is the mean deflection and s is the standard deviation.

5. The sum of 15 deflections is 100, find the mean deflection.

a) 3.33

b) 4.44

c) 6.66

d) 1.5

View Answer

Explanation: The deflection is given by 100/15=6.66, where 100 is the mean deflection and 15 is the number of observations.

6. The deflection correction will be negative if the temperature exceeds ___________

a) 30

b) 32

c) 35

d) 39

View Answer

Explanation: In India the temperature is considered as 35°c for evaluation of pavement because India is a sub tropical and hot country.

7. The Overlay thickness depends on how many factors?

a) One

b) Two

c) Three

d) Four

View Answer

Explanation: The overlay thickness depends on two major factors namely stability and CASA.

8. The VDF is assumed as 4.5 for commercial vehicle count of ___________

a) 1000

b) 1200

c) 1500

d) 2000

View Answer

Explanation: The vehicle damage factor is assumed as 4.5, for commercial vehicle count of more than 1500.

9. The thickness of the flexible overlay is given by ___________

a) hd-he

b) hd+he

c) hd.he

d) hd/he

View Answer

Explanation: The thickness of flexible overlay is given by hd-he, where hd is the thickness of the new design pavement and he is the existing pavement height.

10. The spacing between longitudinal joints may be ___________

a) 3.0 m

b) 3.2 m

c) 3.5 m

d) 4.0 m

View Answer

Explanation: IRC recommends a value of 3.5 m for pavement, So the spacing is equal to the width of pavement.

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