Top Transportation Engineering MCQs for JDO Exam Preparation: Key Questions and Answers

1. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index (PI) is:

(a) 0 < PI < 7

(b) 7 ≤ PI ≤ 17

(c) 17 < PI < 27

(d) PI ≥ 27

Answer: (b)

2. A loose uniform sand with rounded grains has effective grain size of 0.05 cm. Coefficient of permeability of the sand is?

(a) 0.25 cm/sec

(b) 0.5 cm/sec

(c) 1 cm/sec

(d) 1.25 cm/sec

Answer: (a)

3. As the span of a bridge increases, the impact factor ______.

(a) Decreases

(b) Increases

(c) Remains constant

(d) Increases up to a critical value of span and then decreases

Answer: (a)

4. Match List I with List II and select the correct answer using the codes given below the lists:

List-I (Name of person)

A. Stokes

B. Darcy

C. Poiseuille

D. Atterberg

List-II (Field of contribution)

1. Flow through capillary

2. Classification of soils

3. Consistency limits

4. Flow of water through a soil mass

5. Velocity of settling particle

(a) A-5 B-4 C-1 D-3

(b) A-4 B-1 C-5 D-2

(c) A-1 B-5 C-4 D-2

(d) A-3 B-2 C-1 D-5

Answer: (a)

5. The recommended camber for water-bound macadam road is:

(a) 1 in 40 to 1 in 50

(b) 1 in 33 to 1 in 40

(c) 1 in 25 to 1 in 33

(d) 1 in 20 to 1 in 25

Answer: (b)

6. The camber for hill roads in case of bituminous surface is adopted as:

(a) 2.0%

(b) 2.5%

(c) 3.0%

(d) 3.5%

Answer: (b)

7. Camber in the road is provided for:

(a) Counteracting the centrifugal force

(b) Effective drainage

(c) Having proper sight distance

(d) Avoiding overturning

Answer: (b)

8. Fine Aggregates should pass through one of the following IS sieve:

(a) 2.35 mm

(b) 45 µ

(c) 4.75 mm

(d) 75 µ

Answer: (c)

9. In aggregates, the percentage by weight of particles having least dimension less than three-fifth of their mean dimension is termed as:

(a) Elongation index

(b) Flakiness index

(c) Fineness index

(d) Fineness modulus

Answer: (b)

10. In aggregates, the percentage by weight of particles present in it whose greatest dimension (length) is greater than nine-fifth of their mean dimension, is termed as:

(a) Elongation index

(b) Flakiness index

(c) Fineness modulus

(d) Fineness index

Answer: (a)