# TRANSPORTATION ENGINEERING MCQs – 5 | GATE EXAM | CIVIL ENGINEERING

#### ByCivilelite

Sep 5, 2022

 21. If a two-lane National Highway and a two-lane State Highway intersect at right angles, the number of potential conflict points at the intersection, assuming that both the roads are two-way is ____. A.  11 B.  14 C.  24 D.  32

 Answer: C        24 Explanation: On a right angled road intersection with two way traffic there are – 16 crossing conflicts which are the major conflict points, 4 merging and diverging conflicts which are the minor conflicts Hence, the total number of conflict points are 24.

 22. The penetration value of a bitumen sample tested at 25°C is 80. When this sample is heated to 60°C and tested again, the needle of the penetration test apparatus penetrates the bitumen sample by d mm. The value of d can’t be less than ___ mm. A.  5 B.  8 C.  10 D.  20

 23. A combined value of flakiness and elongation index is to be determined for a sample of aggregates. The sequence in which the two tests are conducted is ____. A.  elongation index test followed by flakiness index test on non-elongated aggregates B.  elongation index test followed by flakiness index test on the whole sample C.  flakiness index test followed by elongation index test on the whole sample D.  flakiness index test followed by elongation index test on non-flaky aggregates

 Answer: D     flakiness index test followed by elongation index test on non-flaky aggregates

 24. Aggregate impact value indicates ____ property of aggregates. A.  Durability B.  Hardness C.  Strength D.  Toughness

 25. In Marshall testing of bituminous mixes, as the bitumen content increases the flow value _____. A.  increases monotonically B.  increases first and then decreases C.  decreases first and then increases D.  remains constant