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Latest NHSRCL Junior Engineer Rolling Stock Electrical Exam Question (Objective Questions), MCQ in English

Subjects : Domain Knowledge (Rolling Stock Electrical), Quantitative Aptitude, Logical Reasoning, General Knowledge & English

Question Bank NHSRCL Junior Engineer (Rolling Stock – Electrical) Exam - English
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Domain Knowledge (Rolling Stock Electrical)

Question 1Single Answer
In a high-speed railway corridor, which type of track structure is predominantly adopted to minimize maintenance and ensure long-term geometric stability?
  1. A
    Wooden sleeper ballasted track
  2. B
    Steel trough track
  3. C
    Bridge timber track
  4. D
    Ballastless slab track
Question 2Single Answer
Which parameter primarily determines the minimum safe interval between two successive high-speed trains operating on the same track?
  1. A
    Cant deficiency
  2. B
    Headway
  3. C
    Wheel diameter
  4. D
    Platform height
Question 3Single Answer
In railway terminology, "dwell time" refers to the duration between:
  1. A
    Arrival and departure of a train at a station
  2. B
    Departure from depot and arrival at station
  3. C
    Two signaling blocks
  4. D
    Acceleration and cruising speed
Question 4Single Answer
In a ballastless track system, the principal function of the concrete slab is to:
  1. A
    Increase axle load only
  2. B
    Increase track flexibility
  3. C
    Reduce rail electrical resistance
  4. D
    Provide stable and accurate rail support geometry
Question 5Single Answer
Which type of turnout is generally preferred on high-speed railway lines to permit higher diverging speeds?
  1. A
    Curved turnout with small crossing angle
  2. B
    High-speed movable frog turnout
  3. C
    Stub turnout
  4. D
    Diamond crossing only
Question 6Single Answer
A crossover in railway engineering is mainly used to:
  1. A
    Increase rail inclination
  2. B
    Reduce axle load
  3. C
    Shift a train from one track to another parallel track
  4. D
    Support overhead equipment
Question 7Single Answer
The principal objective of dividing a railway line into signaling blocks is to:
  1. A
    Improve passenger comfort
  2. B
    Increase locomotive weight
  3. C
    Reduce track gauge variation
  4. D
    Prevent collisions by maintaining train separation
Question 8Single Answer
Which factor has the greatest influence on the line capacity of a high-speed railway?
  1. A
    Coach color scheme
  2. B
    Pantograph width
  3. C
    Wheel flange thickness only
  4. D
    Headway between successive trains
Question 9Single Answer
Grade of Automation (GoA 0) in railway operation corresponds to:
  1. A
    Manual train operation without automatic protection
  2. B
    Fully unattended operation
  3. C
    Driverless train operation
  4. D
    Semi-automatic operation
Question 10Single Answer
In Grade of Automation GoA 1, which function remains fully under the responsibility of the driver?
  1. A
    Passenger information only
  2. B
    Automatic door closing only
  3. C
    Train driving with ATP supervision
  4. D
    Centralized scheduling only
Question 11Single Answer
In GoA 2 operation, acceleration and braking are primarily controlled by:
  1. A
    Station Master
  2. B
    Track Circuit
  3. C
    Automatic Train Operation system
  4. D
    Guard only
Question 12Single Answer
In GoA 2, the train operator is generally responsible for:
  1. A
    Manual traction control throughout the journey
  2. B
    Door operation and emergency intervention
  3. C
    Rail grinding activities
  4. D
    OHE maintenance
Question 13Single Answer
Which statement best describes GoA 3 operation?
  1. A
    No staff are present on board under any circumstance
  2. B
    A train attendant is available for intervention, but routine driving is automatic
  3. C
    Driving is fully manual with ATP assistance
  4. D
    Trains are controlled only through radio communication
Question 14Single Answer
Which Grade of Automation represents Unattended Train Operation (UTO)?
  1. A
    GoA 4
  2. B
    GoA 2
  3. C
    GoA 3
  4. D
    GoA 1
Question 15Single Answer
Which onboard system is indispensable for safe implementation of GoA 2 and above?
  1. A
    Automatic Train Protection system
  2. B
    Passenger Information System
  3. C
    HVAC Controller
  4. D
    Fire Alarm Panel
Question 16Single Answer
Which communication technology is widely employed in modern GoA 2 and GoA 3 metro systems for continuous train control?
  1. A
    Morse signaling
  2. B
    Semaphore signaling
  3. C
    CBTC communication network
  4. D
    Token exchange system
Question 17Single Answer
In high-speed rail operations, aerodynamic drag approximately varies with:
  1. A
    Speed
  2. B
    Square of speed
  3. C
    Cube of speed
  4. D
    Square root of speed
Question 18Single Answer
Tunnel boom in high-speed railways is primarily caused by:
  1. A
    Excessive axle load
  2. B
    Rapid compression of air when a train enters a tunnel
  3. C
    Rail corrugation
  4. D
    Overhead wire vibration
Question 19Single Answer
Which design feature is commonly adopted in bullet trains to mitigate tunnel boom?
  1. A
    Larger wheel diameter
  2. B
    Double-flanged wheels
  3. C
    Increased coach width
  4. D
    Streamlined elongated nose profile
Question 20Single Answer
Which aerodynamic phenomenon becomes particularly significant when two high-speed trains pass each other on adjacent tracks?
  1. A
    Wheel slip only
  2. B
    Thermal buckling
  3. C
    Rail creep
  4. D
    Pressure wave interaction
Question 21Single Answer
Axle load in a high-speed railway is primarily restricted to:
  1. A
    Increase fuel consumption
  2. B
    Reduce station dwell time
  3. C
    Minimize track deterioration while maintaining speed
  4. D
    Improve passenger ticketing efficiency
Question 22Single Answer
Compared to conventional heavy-haul railways, high-speed railways generally employ:
  1. A
    Higher axle loads
  2. B
    Variable axle loads every station
  3. C
    Equal axle loads at lower speeds
  4. D
    Lower axle loads with higher operating speeds
Question 23Single Answer
Which parameter is most critical for maintaining ride comfort in high-speed operation?
  1. A
    Coach paint quality
  2. B
    Wheel color
  3. C
    Ticket reservation system
  4. D
    Track geometry accuracy
Question 24Single Answer
The principal purpose of rail cant on curves is to:
  1. A
    Counteract centrifugal force acting on trains
  2. B
    Increase braking distance
  3. C
    Increase axle load capacity
  4. D
    Improve signaling visibility
Question 25Single Answer
Which type of rail fastening is generally preferred for ballastless high-speed tracks due to its elasticity and vibration control?
  1. A
    Elastic fastening system
  2. B
    Dog spike fastening
  3. C
    Wooden key fastening
  4. D
    Hook bolt fastening
Question 26Single Answer
Which factor contributes most significantly to hunting oscillation in high-speed rolling stock?
  1. A
    Pantograph height
  2. B
    Rail painting frequency
  3. C
    Platform length
  4. D
    Wheel-rail dynamic interaction at high speeds
Question 27Single Answer
In railway capacity analysis, reducing headway between successive trains primarily results in:
  1. A
    Lower route availability
  2. B
    Reduced traction efficiency
  3. C
    Higher line capacity
  4. D
    Increased tunnel boom
Question 28Single Answer
Which of the following best defines a signaling block?
  1. A
    A section of platform allocated to passengers
  2. B
    A maintenance depot area
  3. C
    A predetermined track section occupied by only one train at a time under normal operation
  4. D
    A ballast storage location
Question 29Single Answer
Which infrastructure component enables safe movement of trains from one route to another by changing the rail path?
  1. A
    Buffer stop
  2. B
    Turnout (Points and Crossing)
  3. C
    Expansion joint
  4. D
    Check rail only
Question 30Single Answer
Which characteristic is a major advantage of ballastless track over conventional ballasted track in high-speed rail applications?
  1. A
    Higher routine tamping requirement
  2. B
    Lower construction accuracy requirement
  3. C
    Increased ballast consumption
  4. D
    Reduced long-term maintenance with superior geometric stability
Question 31Single Answer
Which factor primarily limits the maximum operating speed of a conventional ballasted track compared with a ballastless track?
  1. A
    Ballast degradation and geometry instability
  2. B
    Rail color
  3. C
    Signal lamp intensity
  4. D
    Coach seating arrangement
Question 32Single Answer
In a high-speed railway, the principal purpose of expansion joints is to:
  1. A
    Increase wheel diameter
  2. B
    Reduce pantograph wear
  3. C
    Improve passenger comfort directly
  4. D
    Accommodate thermal movement of rails and structures
Question 33Single Answer
Which track parameter is most critical for preventing excessive lateral wheel forces at very high speeds?
  1. A
    Rail painting thickness
  2. B
    Platform width
  3. C
    Sleeper color
  4. D
    Track alignment accuracy
Question 34Single Answer
Which signaling philosophy allows trains to operate with continuously updated safe separation rather than fixed track sections?
  1. A
    Absolute Block System
  2. B
    Moving Block System
  3. C
    Token Block System
  4. D
    Time Interval System
Question 35Single Answer
The major advantage of a moving block signaling system over a fixed block system is:
  1. A
    Increased line capacity through dynamic train separation
  2. B
    Larger headway between trains
  3. C
    Elimination of braking systems
  4. D
    Elimination of ATP equipment
Question 36Single Answer
Which component of a turnout permits wheels to safely cross intersecting rails?
  1. A
    Rail pad
  2. B
    Fish plate
  3. C
    Crossing (frog)
  4. D
    Guard beam
Question 37Single Answer
In railway engineering, the switch rails of a turnout are mainly used to:
  1. A
    Support sleepers
  2. B
    Increase axle load
  3. C
    Guide trains toward the selected route
  4. D
    Reduce rail corrosion
Question 38Single Answer
Which parameter has the greatest influence on passenger ride quality in high-speed trains passing through turnouts?
  1. A
    Seat cushion thickness
  2. B
    Coach interior lighting
  3. C
    Pantograph insulation
  4. D
    Crossing angle and turnout geometry
Question 39Single Answer
What is the principal objective of maintaining uniform rail profile in high-speed corridors?
  1. A
    Minimize dynamic wheel-rail interaction
  2. B
    Improve station aesthetics
  3. C
    Reduce platform height
  4. D
    Increase coach capacity
Question 40Single Answer
Which operational factor contributes most to reducing dwell time at stations?
  1. A
    Efficient passenger exchange and optimized door operation
  2. B
    Increasing axle load
  3. C
    Using smaller wheel diameter
  4. D
    Lowering operating voltage
Question 41Single Answer
In high-speed rail operation, scheduled headway is primarily constrained by:
  1. A
    Signaling, braking distance, and train performance
  2. B
    Brake shoe color
  3. C
    Rail temperature only
  4. D
    Passenger ticket price
Question 42Single Answer
Which aerodynamic effect becomes increasingly dominant as train speed exceeds 250 km/h?
  1. A
    Rolling resistance only
  2. B
    Air resistance
  3. C
    Bearing friction only
  4. D
    Track resistance only
Question 43Single Answer
The elongated nose of a bullet train primarily reduces:
  1. A
    Pantograph current
  2. B
    Axle temperature
  3. C
    Wheel flange wear only
  4. D
    Aerodynamic pressure waves and drag
Question 44Single Answer
Which phenomenon is most likely to occur when a high-speed train exits a tunnel?
  1. A
    Pantograph detachment
  2. B
    Wheel lock
  3. C
    Rail fracture
  4. D
    Tunnel pressure wave discharge
Question 45Single Answer
Which infrastructure design measure helps reduce aerodynamic pressure fluctuations near tunnel portals?
  1. A
    Wooden sleepers
  2. B
    Tunnel entrance hoods
  3. C
    Sand ballast
  4. D
    Rail lubricators
Question 46Single Answer
Compared to conventional railways, high-speed railway bridges are generally designed with greater emphasis on:
  1. A
    Decorative appearance
  2. B
    Dynamic interaction between train and bridge
  3. C
    Larger ballast depth only
  4. D
    Timber support structures
Question 47Single Answer
Which factor primarily governs permissible axle load on a high-speed railway?
  1. A
    Structural strength of track and bridges
  2. B
    Coach paint quality
  3. C
    Passenger occupancy only
  4. D
    Signal visibility
Question 48Single Answer
Which maintenance philosophy is commonly adopted for ballastless track in high-speed rail systems?
  1. A
    Frequent tamping operations
  2. B
    Preventive condition-based maintenance
  3. C
    Daily ballast screening
  4. D
    Manual packing of sleepers
Question 49Single Answer
Which Grade of Automation requires automatic train driving while a trained staff member remains onboard for operational intervention if required?
  1. A
    GoA 0
  2. B
    GoA 1
  3. C
    GoA 3
  4. D
    GoA 4
Question 50Single Answer
Which of the following best distinguishes GoA 4 from GoA 3?
  1. A
    Higher operating voltage
  2. B
    Reduced train speed
  3. C
    Elimination of onboard staff required for train operation under normal conditions
  4. D
    Manual braking at stations
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