GATE CE Highway Pavements PYQs & Answers — Page 2

Questions 11–20 of 30. Imported answers require independent review unless marked reviewed.

The following data is obtained from an axle load survey at a site:

Average rear axle load = 1200 kg Number of commercial vehicles = 800 per day

The pavement at this site would be reconstructed over a period of 5 years from the date of survey. The design life of the reconstructed pavement is 15 years. Use the standard axle load as 8160 kg and the annual average vehicle growth rate as 4.0%. Assume that Equivalent Wheel Load Factor (EWLF) and Vehicle Damage Factor (VDF) are equal.

The cumulative standard axle (in msa) for the pavement design is __________ (rounded off to 2 decimal places).

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Which of the following options match the test reporting conventions with the given material tests in the table? Table: Test reporting condition: (P) Reported as ratio; (Q) Reported as percentage; (R) Reported in temperature; (S) Reported in length. Material test: (I) Solubility of bitumen; (II) Softening point of bitumen; (III) Los Angeles abrasion test; (IV) Flash point of bitumen; (V) Ductility of bitumen; (VI) Specific gravity of bitumen; (VII) Thin film oven test.

Your answerSelect all correct options. You can choose more than one.

(P) - (VI); (Q) - (I); (R) - (II); (S) - (VII)

(P) - (VI); (Q) - (III); (R) - (IV); (S) - (V)

(P) - (VI); (Q) - (I); (R) - (II); (S) - (V)

(P) - (VI); (Q) - (III); (R) - (IV); (S) - (VII)

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Consider the Marshall method of mix design for bituminous mix. With the increase in bitumen content, which of the following statements is/are TRUE?

Your answerSelect all correct options. You can choose more than one.

the Stability decreases initially and then increases

the Flow increases monotonically

the air voids (VA) increases initially and then decreases

the voids filled with bitumen (VFB) increases monotonically

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It is given that an aggregate mix has 260 grams of coarse aggregates and 240 grams of fine aggregates. The specific gravities of the coarse and fine aggregates are 2.6 and 2.4, respectively. The bulk specific gravity of the mix is 2.3.

The percentage air void in the mix is __________. (round off to the nearest integer)

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For the dual-wheel carrying assembly shown in the figure, P is the load on each wheel, a is the radius of the contact area of the wheel, s is the spacing between the wheels, and d is the clear distance between the wheels. Assuming that the ground is an elastic, homogeneous, and isotropic half space, the ratio Equivalent Single Wheel Load (ESWL) at depth z = d/2 to the ESWL at depth z = 2s is ________. (round off to one decimal place)

(Consider the influence angle to be 45° for the linear dispersion of stress with depth)

Diagram for Civil Engineering question 65

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The softening point of bitumen has the same unit as that of

Your answerChoose one option.

distance

temperature

time

viscosity

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In an aggregate mix, the proportions of coarse aggregate, fine aggregate and mineral filler are 55%, 40% and 5%, respectively. The values of bulk specific gravity of the coarse aggregate, fine aggregate and mineral filler are 2.55, 2.65 and 2.70, respectively. The bulk specific gravity of the aggregate mix (round off to two decimal places) is ________.

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For an axle load of 15 tonne on a road, the Vehicle Damage Factor (round off to two decimal places), in terms of the standard axle load of 8 tonne, is __________.

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A dowel bar is placed at a contraction joint. When contraction occurs, the concrete slab cracks at predetermined location(s). Identify the arrangement, which shows the correct placement of dowel bar and the place of occurrence of the contraction crack(s).

Your answerChoose one option.

Diagram for Civil Engineering question 31

Diagram for Civil Engineering question 31 (figure 2)

Diagram for Civil Engineering question 31 (figure 3)

Diagram for Civil Engineering question 31 (figure 4)

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Group-I gives a list of test methods for evaluating properties of aggregates. Group-II gives the list of properties to be evaluated.

Group-I: Test methods P. Soundness test Q. Crushing test R. Los Angeles abrasion test S. Stripping value test

Group-II: Properties

Strength

Resistance to weathering

Adhesion

Hardness

The correct match of test methods under Group-I to properties under Group-II, is

Your answerChoose one option.

P-4; Q-1; R-2; S-3

P-2; Q-1; R-4; S-3

P-3; Q-4; R-1; S-2

P-2; Q-4; R-3; S-1

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GATE CE Highway Pavements PYQs

Question 64

Question 51

Question 51

Question 64

Question 65

Question 16

Question 53

Question 20

Question 31

Question 32