Free Transportation Engineering MCQs with Answers

• A. Sources and destinations of individual trips
• B. Number of vehicles using each pavement layer
• C. Strength of soil beneath the roadway
• D. Superelevation required on road curves

Explanation: An origin-destination survey records where trips begin and end, along with related travel information.

• A. Increased pavement drainage requirements
• B. Vehicle off-tracking and driver psychology
• C. Reduced strength of the road subgrade
• D. Greater thickness of the surface dressing

Explanation: The rear wheels of a vehicle follow a shorter radius than the front wheels, causing off-tracking on curves.

• A. One-fourth of the jam density
• B. Equal to the jam density
• C. One-half of the jam density
• D. Twice the jam density

Explanation: The Greenshields model assumes a linear relationship between speed and density.

• A. Arithmetic mean of vehicle speeds
• B. Modal value of vehicle speeds
• C. Geometric mean of vehicle speeds
• D. Harmonic mean of vehicle speeds

Explanation: Space mean speed represents the average speed over a specified road length and is calculated as the harmonic mean of individual speeds.

• A. Vehicles in the intersection to clear it
• B. Pedestrians to begin crossing early
• C. Additional vehicles to join the queue
• D. The signal controller to change its cycle

Explanation: During the all-red interval, all approaches display red so vehicles already within the intersection can leave safely.

• A. Loss of aggregate particles from the surface
• B. Upward movement of excess binder to the surface
• C. Formation of transverse cracks from shrinkage
• D. Depression caused by weak underlying soil

Explanation: Bleeding produces a shiny, smooth surface because excess bitumen rises to the pavement surface.

• A. Provide drainage through the pavement surface
• B. Increase the width available to moving vehicles
• C. Control cracking caused by concrete shrinkage
• D. Prevent vehicles from crossing the centre line

Explanation: A contraction joint creates a planned weakened plane where shrinkage and temperature-related contraction can produce a controlled crack.

• A. Stop automatically at a station platform
• B. Increase its speed on a straight track
• C. Reduce vibration between rail and sleeper
• D. Change from one track to another

Explanation: A turnout consists of track components that guide railway vehicles from one track onto another.

• A. Runway threshold
• B. Taxiway shoulder
• C. Aircraft holding bay
• D. Runway blast pad

Explanation: The runway threshold identifies the beginning of the landing surface available for aircraft operations.

• A. Circular curve
• B. Parabolic curve
• C. Spiral curve
• D. Compound horizontal curve

Explanation: A parabolic vertical curve provides a gradual change in gradient and gives a convenient relationship between elevation and distance.

• A. Driver reaction time on the approach
• B. Pavement thickness at the low point
• C. Headlight sight distance along the curve
• D. Width of the shoulder on the curve

Explanation: At night, the driver’s view on a sag curve is limited by the headlight beam and its upward angle.

• A. Aggregate crushing value
• B. Flakiness index
• C. Los Angeles abrasion value
• D. Aggregate impact value

Explanation: The aggregate impact value measures resistance to sudden impact or shock loading.

• A. To accommodate slab expansion due to temperature rise
• B. To improve the skid resistance of the pavement
• C. To prevent water from entering the subgrade
• D. To increase the compressive strength of concrete

Explanation: An expansion joint provides space for concrete slabs to expand when temperature increases.

• A. Parking accumulation survey
• B. Cordon count survey
• C. Spot speed survey
• D. Axle load survey

Explanation: A cordon count records traffic crossing a defined boundary, or cordon, around an urban area.

• A. Total traffic volume entering the intersection daily
• B. Average number of vehicles waiting during red
• C. Maximum discharge rate of a lane under continuous green
• D. Time required for pedestrians to cross the road

Explanation: Saturation flow is the maximum rate at which vehicles can discharge from a lane when a continuous green signal is available and the queue…

• A. Recreational function
• B. Warning function
• C. Guide function
• D. Regulatory function

Explanation: Regulatory signs communicate legal restrictions, prohibitions, and required actions, such as speed limits or no entry.

• A. Join two rail ends in a continuous track
• B. Support the rail directly on the ballast
• C. Provide extra elevation on a curve
• D. Guide a train from one track to another

Explanation: Fish plates, used with bolts, connect the ends of two rails and maintain alignment across the rail joint.

• A. Hangar
• B. Terminal building
• C. Control tower
• D. Runway shoulder

Explanation: The terminal building handles passenger processing, boarding, arrivals, and baggage movement.

• A. Weathering by repeated wetting and drying
• B. Shape deformation during compaction
• C. Wear and impact in service
• D. Absorption of bitumen during mixing

Explanation: The Los Angeles abrasion test evaluates aggregate toughness and resistance to abrasion and impact caused by traffic and handling.

• A. Median island
• B. Central reserve
• C. Traffic refuge island
• D. Catch-water drain

Explanation: A catch-water drain is placed on the uphill side of a cut to intercept runoff before it reaches the road slope or pavement.