Q.1) As per IRC, Intermediate Sight Distance (ISD) is :
A) 2 x SSD
B) 1.5 x OSD
C) 3 x SSD
D) 2 x OSD
Q.2) The rate of superelevation for a horizontal curve of radius 700 m in a national highway for a design speed of 80 kmph is :
e = V2/(127*R)
e = 802/(127*700) = 0.0719.
Since, e ≤ 0.07
So, e max = 0.07
Q.3) The Camber recommended for cement concrete road in light rainfall is :
A) 1 in 33
B) 1 in 50
C) 1 in 60
D) 1 in 2.5
For Bitumenous Roads :
- Cement Concrete and thick bituminous = 1 in 50 (2%)
- Thin bituminous surface = 1 in 40 (2.5%)
- Water Bound Macadam = 1 in 33 (3%)
- Earth Road = 1 in 25 (4%)
For Cement Concrete Road :
- Cement Concrete and thick bituminous = 1 in 60 (1.7%)
- Thin bituminous surface = 1 in 50 (2%)
- Water Bound Macadam = 1 in 40 (2.5%)
- Earth Road = 1 in 33 (3%)
Q.4) The road roughness is measured by –
A) Bump integrator
B) Overlay vehicle
C) Motor grader
D) Forklift truck
Bump integrator: A device used to measure the force of impacts on a vehicle.
Overlay vehicle: A vehicle used for transporting freight and materials.
Motor grader: A heavy equipment vehicle used for grading roads and other surfaces.
Forklift truck: A powered industrial truck used to lift and transport materials.
Q.5) Which type of camber is formed by use of the straight surface at the edges but parabolic surface at the centre?
A) Mixed Camber
B) Circular Camber
C) Straight Camber
D) Parabolic Camber
Mixed Camber: Mixed camber refers to a road surface that has a combination of positive and negative slopes along its width. This type of road camber can provide improved drainage and reduced tire wear.
Circular Camber: Circular camber has a constant, uniform slope along its width. This type of road camber can provide improved visibility for drivers and reduced standing water on the road surface.
Straight Camber: Straight camber has no slope along its width. This type of road camber is often used in high-speed roads where flat road surfaces are important for stability.
Parabolic Camber: Parabolic camber has a gradually increasing slope along its width. This type of road camber can provide improved drainage and reduced tire wear, especially in areas with heavy rainfall.
Q.6) Which of the following instrument is used for determining spot speed?
Spot Speed can be measured using following :
2.Pressure Contact Tubes
3. Direct Timing Procedure
4. Radar Speedometer
5.Time-Lapse Photographic methods
Q.7) As the speed increases space headway :
A) First increases then decreases
B) Always increases
C) First decreases then increases
D) Always decreases
Speed Headway, S = V.t [S∝V.t]
V = Avg. velocity in m/sec
t = reaction time in sec
Q.8) Which of the following is NOT a method of conducting Origin and Destination studies?
A) Tag on car method
B) Trapezoidal rule method
C) Return post card method
D) Road side interview method
Methods of conducting Origin and Destination studies :
- Return post card method
- Road side interview method
- Home interview method
- Work spot interview
- Licence plate inteview
- Tag on car method
Q.9) The softening point of bitumen can be determined by using :
C) Briquette mould
D) Ring and Ball Apparatus
Penetrometer: It is a device used to measure the resistance of a material to penetration. It is used to determine the hardness, strength, and elasticity of a variety of materials, including soil, asphalt, concrete, and rock.
Viscometer: It is a device used to measure the viscosity of a fluid.
Briquette Mould: It is a device used to shape and press materials, such as sawdust, paper, and coal dust, into a compact and uniform form. Briquette moulds are commonly used in the manufacturing of fuel briquettes for use in boilers, stoves, and heating systems.
Ring and Ball Apparatus: It is a device used to measure the softening point of asphalt and bitumen. The softening point is the temperature at which a material changes from a solid to a liquid state. The ring and ball apparatus consists of a metal ring and a steel ball that is placed inside the ring. The apparatus is heated and the temperature is monitored until the ball sinks through the asphalt or bitumen sample. The softening point is recorded as the temperature at which the ball sinks a specified distance into the sample.
Q.10) CBR method for the design of flexible pavement takes care of mainly?
A) Soil Characteristics
B) Cement grounding
C) Traffic intensity
D) Property of road material
CBR test is used to evaluate the penetration resistance of sub-grade. The results obtained, are used to determine the thickness of pavement and its component layers.
Q.11) The main function of sleeper is –
A) to hold rails at correct gauge
B) to support rails
C) to distribute load from the rails to the ballast
D) all of the above
Main functions of sleeper are :
- To hold the rail at correct gauge.
- To distribute the load from rails to the ballast.
- To hold rails in correct position i.e. proper level or transverse till
- Maintain track geometry during service life
- Maintain longitudinal and lateral stability.
- Maintain a consistent and uniform spacing between rails i.e. ensuring proper alignment of the track and stability of the trains running on it.
- Sleepers act as shock absorbers, reducing the impact of trains passing over them and protecting the rails from damage.
- Sleepers reduce the risk of rust and corrosion to the rails and other components by keeping them apart to allow water to drain away from the track.
- Sleepers provide a secure base for fastening the rails to the track, ensuring the stability and safety of trains running on the tracks.
Q.12) The main function of fish plates in rail joints is to :
A) for expansion or contraction
B) join rails with sleeper
C) join two rails together
D) transfer the load to the ballast
A metal plate used to attach two pieces of railroad track together is called a fish plate, also referred to as a rail joint. Trains can go smoothly from one stretch of track to the next thanks to a continuous rail that is created by inserting a plate between the ends of two rails and fastening it in place with bolts or screws.
In order to transfer the weight from one rail to the other and keep the rails from separating from the weight and motion of trains, fish plates were invented. They also aid in dampening vibration and absorbing shock, both of which can eventually harm the track.
Fish plates are typically made of steel or iron, and are designed to withstand the extreme temperatures, forces, and wear and tear associated with railway operation. They play a critical role in maintaining the stability and safety of railway tracks, and are an essential component in the construction and maintenance of railway infrastructure.
Q.13) In railways, the disc signals are provided for the purpose of :
B) Dead slow movement
C) Possible danger ahead
D) Indicating busy platform
Disc signals consist of a circular metal disc, mounted on a mast or signal post, that displays different aspects or “indications” to indicate to the train driver the status of the line ahead. It can display various aspects, including green (proceed), yellow (proceed with caution), and red (stop). These indications provide clear instructions to the train driver, allowing them to safely control the speed and movement of their train.
Q.14) The most common countermeasure used to prevent scour at bridge abutments is –
A) Rip rap
B) Sand bags
C) Cut water
Q.15) For a bridge deck the most economical section shall be –
A) An I-section
B) A Channel section
C) A Double T-section
D) Box section
Q.16) For airports serving big aircrafts, ICAO recommends the cross wind component should not exceed ______.
A) 10 kmph
B) 25 kmph
C) 35 kmph
D) 15 kmph
Permissible cross wind limits as per ICAO for different types of aircrafts are :
- Small Aircraft = 15 kmph
- Medium Aircraft = 25 kmph
- Big Aircraft = 35 kmph
Q.17) What does the Wind Rose Diagram for the orientation of the airport runway give?
A) Direction of wind
B) Direction and duration of wind
C) Direction, duration and intensity of wind
D) None of the above
A wind rose diagram is a graphical representation used to display the frequency and direction of wind at a specific location. The diagram typically consists of a circle, divided into spokes that represent the different cardinal directions (North, South, East, and West), with the length of each spoke proportional to the frequency of wind from that direction.
Applications are as follows :
- It is used to determine the preferred runway for take-off and landing based on wind conditions.
2. It is used to provide information on wind shear, which can be a serious safety hazard for aircraft during takeoff and landing. Wind rose diagrams provide a visual representation of wind patterns and wind shear, allowing airport personnel to take action to ensure the safety of aircraft and passengers.
3. It is used to make more accurate weather forecasts, including wind speed and direction
Q.18) The capacity of parallel runway system depends primarily on –
A) distance from terminal
B) length of runways
C) slopes of adjacent areas
D) lateral spacing between two runways
Q.19) Which ventilation system is suitable for tunnels longer than 5 – 6 km?
A) Transverse airflow ventilation
B) Longitudinal ventilation system
C) Mechanical system
D) Natural ventilation system
Q.20) The lowest achievable slope in a tunnel and its access roads while ensuring proper drainage is –