Pavement Design Practice Test 9

1. The Shelby tubes can only be driven through unbound fine-grained soil layer.

True

False

2. The geosynthetic clay liners are made with ______ and geotextile.

Kaolinite

Illite

Montmorillonite

Bentonite

3. Who developed the Benkelman beam deflection studies (BBD) and in which year?

C.A Benkelman in 1953

A.C Benkelman in 1935

A.C Benkelman in 1953

C.A Benkelman in 1935

4. BBD studies were carried out on a highway pavement at a temperature of 40°C. The rebound deflection was found to be 1.41 mm. what would be the corrected rebound deflection?

1.33 mm

1.40 mm

1.36 mm

1.35 mm

5. Shelby tube samples can be used to determine the PVR value of materials. What does PVR mean?

Potential Volume Rise

Present Volume Ratio

Present Vertical Ratio

Potential Vertical Rise

6. What is the operating speed of Benkelman beam deflection equipment?

50 km/hr

32 km/hr

Crawling

Pulsating

7. The test results from the DCP test cannot be related to which of the below?

CBR

Deflection

Resilient modulus

In-situ density

8. In CPCD pavements, the stitching method is most useful for transverse cracks.

False

True

9. Which IRC code is referred to while performing the BBD studies?

IRC 91:1997

IRC 81:1997

IRC 81:1887

IRC 91:1887

10. BBD studies were conducted on a pavement at three points and the following data were recorded:

point	D_o (div)	D_i (div)	D_f (div)
A	0	48	45
B	0	34	30
C	5	59	57

Find the rebound deflection at each point i.e. A, B and C respectively if least count of dial gauge is 0.01 mm and the value of k is 2.91.

0.28 mm, 0.63 mm and 1.96 mm

1.28 mm, 1.63 mm and 0.96 mm

1.82 mm, 1.36 mm and 0.69 mm

0.82 mm, 0.36 mm and 1.69 mm