Free Transportation Engineering MCQs with Answers

• A. Overtake safely without conflicting with opposing traffic
• B. Stop before reaching a roadside hazard
• C. Enter a highway from an adjoining property
• D. Pass through a signalized intersection safely

Explanation: Overtaking sight distance allows a vehicle to pass a slower vehicle and return to its lane without interfering with an approaching…

• A. Steepest gradient permitted for emergency use
• B. Maximum desirable gradient under normal conditions
• C. Average gradient measured along the entire route
• D. Gradient provided only at a horizontal curve

Explanation: The ruling gradient is the maximum desirable slope used in ordinary highway design, considering vehicle performance and operating…

• A. Design speed
• B. Free-flow speed
• C. Critical speed
• D. Spot speed

Explanation: Flow equals speed multiplied by density, and its maximum value occurs at the critical speed.

• A. Seal an unpaved subgrade before base placement
• B. Reduce evaporation from fresh concrete
• C. Improve the bearing capacity of weak soil
• D. Bond an existing bituminous surface to a new layer

Explanation: A tack coat is a thin bituminous application used to bond two bituminous layers.

• A. Permanent deformation under applied load
• B. Water absorption by the aggregate
• C. Abrasion of railway ballast particles
• D. Shrinkage cracking in cement concrete

Explanation: Marshall stability is the maximum load carried by a compacted bituminous specimen at the specified test temperature and loading rate.

• A. The chemical reaction between bitumen and aggregate
• B. A difference in temperature between the top and bottom surfaces
• C. The impact of vehicles at expansion joints
• D. The unequal spacing of railway sleepers

Explanation: Temperature differences through the slab depth cause the concrete pavement to curl or warp, producing warping stresses.

• A. Join two rail ends with a fishplate
• B. Provide electrical power to signalling equipment
• C. Distribute sleeper loads and provide drainage
• D. Maintain the exact length of each rail

Explanation: Ballast distributes loads from sleepers to the formation, provides drainage, and helps maintain track alignment.

• A. Passenger lounge and baggage hall
• B. Control tower and weather station
• C. Fuel farm and airport boundary
• D. Runway and apron or terminal area

Explanation: Taxiways allow aircraft to move between runways and operational areas such as aprons, hangars, and terminals.

• A. Stripping caused by loss of adhesion from water
• B. Ravelling caused only by surface oxidation
• C. Bleeding caused only by excessive road camber
• D. Corrugation caused only by rail traffic

Explanation: Water can destroy the bond between bitumen and aggregate, producing stripping and weakening the pavement structure.

• A. The variation of pavement thickness along a route
• B. The movement pattern between traffic zones
• C. The cross slope of a road surface
• D. The distribution of stresses beneath a wheel load

Explanation: A desire-line diagram represents the major origin and destination movements between traffic analysis zones.

• A. Final location survey
• B. Preliminary survey
• C. Reconnaissance survey
• D. Construction staking survey

Explanation: A reconnaissance survey examines the terrain, obstacles, settlements and broad route possibilities.

• A. Number of peak hours
• B. Number of working days
• C. Number of lane kilometres
• D. Number of days in the year

Explanation: AADT represents the average traffic volume for a typical day over a full year.

• A. 1,200 vehicles per hour
• B. 900 vehicles per hour
• C. 600 vehicles per hour
• D. 3,600 vehicles per hour

Explanation: Flow is the reciprocal of time headway when expressed in consistent units.

• A. Permanent deformation of the subgrade
• B. Loss of adhesion between bitumen and aggregate
• C. Formation of transverse concrete cracks
• D. Polishing of railway ballast particles

Explanation: Stripping is the separation of bitumen from aggregate, usually because water weakens the bond.

• A. Transfer wheel loads across a transverse joint
• B. Permit free expansion at an expansion joint
• C. Keep adjoining lanes from separating
• D. Reduce the required concrete thickness

Explanation: Tie bars hold adjacent concrete slabs or lanes together and prevent the longitudinal joint from opening.

• A. Rail cant
• B. Formation width
• C. Sleeper spacing
• D. Track gauge

Explanation: Track gauge is the specified distance between the inner faces of the rails.

• A. Aircraft parking, loading and servicing
• B. Aircraft takeoff and landing
• C. Controlling runway lighting systems
• D. Storing excavated runway soil

Explanation: The apron is the paved area where aircraft park and receive services such as boarding, loading, refuelling and maintenance.

• A. Increase the stopping sight distance
• B. Drain rainwater away from the pavement
• C. Reduce the length of a vertical curve
• D. Provide extra width on a horizontal curve

Explanation: Camber gives the pavement a cross slope that allows rainwater to flow toward the edges.

• A. Insufficient shoulder width
• B. Excessive road camber
• C. Insufficient superelevation
• D. Excessive vertical gradient

Explanation: Insufficient superelevation leaves too much of the lateral demand to be resisted by tyre friction, increasing the risk of outward…

• A. Permissive phase
• B. Coordination phase
• C. Flashing phase
• D. Protected phase

Explanation: A protected phase gives a movement an exclusive right of way while conflicting traffic is stopped.