306. The main object of providing a camber is-. [MOD-20]
ব্যাখ্যা: Camber is provided on the road surface to achieve the following objects:
(i) To drain off rain water from the surface of the carriageway as quickly as possible.
(ii) To improve the architectural appearance of the roadway.
to make the road surface impervious
to make the road surface durable
to drain off rain water from road surface as quickly as possible
307. CBR test কত Penetrations-এর জন্য নিরূপণ করা হয়?
CBR টেস্টে Penetration মাপার জন্য ৫০ মিমি, ব্যাসের প্লাজার 1.25 মিমি/মিনিট হারে প্রয়োগ করা হয়, যা লোড 13.44kN এবং 10.15 kW-এর জন্য যথাক্রমে ২.৫ মিমি ও ৫ মিমি মান দেখায়।
308. The superelevation is given by - Where G = Gauge of the track, V Velocity of the vehicle, r = radius of the circular path. [MOD-20]
ব্যাখ্যা: Superelevation is the transverse slop provided to counteract the effect of centrifugal force and reduce the tendency of vehicle to overturn and to skid laterally out words by raising the pavement outer edge with respect to inner edge
ব্যাখ্যা: Superelevation is directly proportional to the square of the volocity and inversely proportional to the acceleration due to gravity, radius of the curvature.