Pavement Design Practice Test 7

1. ______ joint is the most common one.

Contraction

Construction

Warping

Expansion

2. Which are the characteristics of an isolation joint provided in the pavement?

Half width, full depth

Full width, full depth

Full width, half depth

Half width, half depth

3. The axle load and the stress ratio of the various axle loads are represented in the table below. The expected number of repetitions is also provided against each axle load. Using the data given below, find the cumulative fatigue life.

Axle load (AL)	Stress ratio	Expected repetitions (n)
Single axle
20	0.58	67544
18	0.50	165645
16	0.43	487907
Tandem axle
36	0.48	35765
32	0.42	35765

0.2445

0.2245

0.2425

0.2524

4. What is the fatigue life of the pavement if the flexural stress due to load is 18.5 kg/cm²?

1099

6.279 X 10⁷

3.34 X 10³

Unlimited

5. The temperature differential for different states is expressed in a tabular format. What are the various slab thicknesses for which the same is given?

10, 15, 20, 25, 30 cm

15, 20, 25, 30 cm

10, 20, 30 cm

15, 25, 35 cm

6. What is the maximum spacing for a plain 12 mm diameter tie bar to be used in a 25 cm thick slab?

45 cm

50 cm

55 cm

40 cm

7. Find the spacing for contraction joint to be included in an RCC slab in the rigid pavement having the following details.
Permissible tensile stress in the reinforcement, S_S = 1200 kg/cm²
Slab width, b = 4 m
Thickness of slab, h = 25 cm
Area of reinforcement, A = 9.35 m²
Coefficient of friction, f = 0.15
Unit weight of concrete, W = 2400 kg/m³

2.72 m

2.27 m

7.27 m

7.72 m

8. At what length of the slab does the maximum stress due to friction occur in the case of contraction joints?

One fourth

Half

Three fourth

Full

9. The joint filler in the expansion joint is assumed to be compressed by how much percentage?

75 %

35 %

80 %

50 %

10. The 7 days unconfined compressive strength of cement-treated granular soil should be ______

Minimum of 2.1 MPa

Minimum of 7 MPa

Maximum of 2.1 MPa

Maximum of 7 MPa