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Highway Engineering - Interview Questions and Answers

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26. When the bituminous surfacing is done on already existing black top road or over existing cement concrete road, the type of treatment to be given is
A. seal coat
B. tack coat
C. prime coat
D. spray of emulsion
Explanation:
27. The camber for hill roads in case of bituminous surfacing is adopted as
A. 2%
B. 2.5%
C. 3%
D. 4%
Explanation:
28. The walls which are necessary on the hill side of roadway where earth has to be retained from slipping is known as
A. retaining wall
B. breast wall
C. parapet wall
D. none of the above
Explanation:
29. Select the correct statement.
A. Quantity of binder required for tack coat is less than that required for prime coat.
B. Prime coat treatment is given for plugging the voids in water bound macadam during bituminous road construction.
C. Seal coat is the final coat over certain previous bituminous pavements.
D. A bitumen primer is a high viscosity cutback.
Explanation:
30. The most suitable equipment for compacting clayey soils is a
A. smooth wheeled roller
B. pneumatic tyred roller
C. sheep foot roller
D. vibrator
Explanation:
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