21. In highway construction, rolling starts from________________? September 7, 2025 by Admin A. sides and proceed to centre B. centre and proceed to sides C. one side and proceed to other side D. any of the above ✅ The correct answer is option A.
22. A traffic rotary is justified where______________? September 7, 2025 by Admin A. number of intersecting roads is between 4 and 7 B. space is limited and costly C. when traffic volume is less than 500 vehicles per hour D. when traffic volume is more than 5000 vehicles per hour ✅ The correct answer is option A.
23. When the width of kerb parking space and width of street are limited, generally preferred parking system is________________? September 7, 2025 by Admin A. parallel parking B. 45° angle parking C. 65° angle parking D. 90° angle parking ✅ The correct answer is option A.
24. The most economical lighting layout which is suitable for narrow roads is_______________? September 7, 2025 by Admin A. single side lighting B. staggered system C. central lighting system D. none of the above ✅ The correct answer is option A.
25. In the penetration macadam construction, the bitumen is__________________? September 7, 2025 by Admin A. sprayed after the aggregates are spread and compacted B. premixed with aggregates and then spread C. sprayed before the aggregates are spread and compacted D. none of the above ✅ The correct answer is option A.
26. On a single lane road with two way traffic, the minimum stopping sight distance is equal to______________? September 7, 2025 by Admin A. stopping distance B. two times the stopping distance C. half the stopping distance D. three times the stopping distance ✅ The correct answer is option B.
27. The method of design of flexible pavement as recommended by IRC is____________? September 7, 2025 by Admin A. group index method B. CBR method C. Westergaard method D. Benkelman beam method ✅ The correct answer is option B.
28. Which of the following represents a carpet of sand-bitumen mix without coarse aggregates ? September 7, 2025 by Admin A. mastic asphalt B. sheet asphalt C. bituminous carpet D. bituminous concrete ✅ The correct answer is option B.
29. Which of the following shapes is preferred in a valley curve ? September 7, 2025 by Admin A. simple parabola B. cubic parabola C. spiral D. lemniscate ✅ The correct answer is option B.
30. Percentage of free carbon in bitumen is______________? September 7, 2025 by Admin A. more than that in tar B. less than that in tar C. equal to that in tar D. none of the above ✅ The correct answer is option B.