1791. The ductility value of bitumen for suitability in road construction should not be less than____________?
A. 30 cm
B. 40 cm
C. 50 cm
D. 60 cm
✅ The correct answer is option C.
Civil Engineering
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1792. The maximum number of vehicles beyond which the rotary may not function efficiently is______________?
A. 500 vehicles per hour
B. 500 vehicles per day
C. 5000 vehicles per hour
D. 5000 vehicles per day
✅ The correct answer is option C.
1793. The attainment of super elevation by rotation of pavement about the inner edge of the pavement_______________?
A. is preferable in steep terrain
B. results in balancing the earthwork
C. avoids the drainage problem in flat terrain
D. does not change the vertical alignment of road
✅ The correct answer is option C.
1794. The most efficient traffic signal system is________________?
A. simultaneous system
B. alternate system
C. flexible progressive system
D. simple progressive system
✅ The correct answer is option C.
1795. Bitumen of grade 80/100 means______________?
A. its penetration value is 8 mm
B. its penetration value is 10 mm
C. its penetration value is 8 to 10 mm
D. its penetration value is 8 to 10 cm
✅ The correct answer is option C.
1796. Group index method of design of flexible pavement is_______________?
A. a theoretical method
B. an empirical method based on physical properties of subgrade soil
C. an empirical method based on strength characteristics of subgrade soil
D. a semi empirical method
✅ The correct answer is option B.
1797. Select the correct statement______________?
A. More the value of group index, less thickness of pavement will be required
B. More the value of CBR, greater thickness of pavement will be required
C. Minimum and maximum values of group index can be 0 and 20 respectively
D. all of the above
✅ The correct answer is option C.
1798. For the construction of water bound macadam roads, the correct sequence of operations after spreading coarse aggregates is________________?
A. dry rolling, wet rolling, application of screening and application of filler
B. dry rolling, application of filler, wet rolling and application of screening
C. dry rolling, application of screening, wet rolling and application of filler
D. dry rolling, application of screening, application of filler and wet rolling
✅ The correct answer is option C.
1799. The maximum limit of water absorption for aggregate suitable for road construction is____________?
A. 0.4 %
B. 0.6%
C. 0.8 %
D. 1.0 %
✅ The correct answer is option B.
1800. The provision of traffic signals at intersections______________?
A. reduces right angled and rear end collisions
B. increases right angled and rear end collisions
C. reduces right angled collisions but may increase rear end collisions
D. reduces rear end collisions but may increase right angled collisions
✅ The correct answer is option C.