# TRANSPORTATION ENGINEERING MCQs 1 | CIVIL ENGINEERING | GATE EXAM

#### ByCivilelite

Sep 1, 2022

 1.  The important factor considered in the design of summit curves on highways is __. A. comfort to passenger B. superelevation C. sight distance D. impact factor

 Answer: C   sight distance     Explanation:   When a fast-moving vehicle travels along a summit curve, the centrifugal force will act upward, against gravity, which relieves some of the pressure on the tyres and suspension springs of the vehicle.   Thus, there is no issue with passengers feeling uncomfortable when riding on summit curves. The provision of sufficient sight distance is the only challenge in constructing summit curves.   Every portion of the road system, as well as summit curves, should always have the stopping sight distance or the absolute minimum sight distance.

 2.  The ideal form of curve for the summit curve is ____. A. lemniscate B. circular C. spiral D. parabola

 Answer: B circular     Explanation:   The sight distance is constant throughout the length of the circular summit curve. In practice, we employ square parabolic curves since they are simple to compute and provide comfortable riding.

 3. Transition curves are provided on the approach to horizontal curves in order to __. A. reduce jerk to allowable levels B. increase jerk to allowable levels C. minimize the length of the horizontal curve D. simplify the laying out and construction of the horizontal curve

 4. On sag (or valley) curves the available sight distance is determined based on ___. A. height of headlight B. height of driver’s eye C. height of obstacle D. design speed

 5.  At highway stretches where the required overtaking sight distance cannot be provided, it is necessary to incorporate in such sections the following ___. A. one third of the required overtaking sight distance B. at least twice the stopping sight distance C. three times the stopping sight distance D. half of the required overtaking sight distance

 Answer: B   at least twice the stopping sight distance     Explanation:   Intermediate Sight Distance ISD = 2 * SSD Minimum length of overtaking zone = 3 * OSD Desirable length of overtaking zone = 5 * OSD