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As published by the Kerala Public Service Commission.

All 100 questions with answers

Tap an option to check yourself, or open the answer. Answers follow the official Kerala PSC answer key.

  1. 1.
    Currency of a learners licence is __________
    Show answer and explanation
    Answer: C —
    6 months
    The validity of a learner's license in India is 6 months.
    Report a mistake
  2. 2.
    Which of the following is not a transport vehicle?
    Show answer and explanation
    Answer: D —
    Motor Car
    A motor car is generally classified as a non-transport vehicle unless used for commercial purposes.
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  3. 3.
    Minimum age to obtain a learners licence for motor cars is
    Show answer and explanation
    Answer: B —
    18 years
    The minimum age to obtain a learner's license for a motor car is 18 years.
    Report a mistake
  4. 4.
    Minimum learning period to attend practical test on driving is
    Show answer and explanation
    Answer: A —
    30 days
    A minimum period of 30 days must elapse after the issuance of a learner's license before appearing for the driving test.
    Report a mistake
  5. 5.
    The colour of the registration number plate in Battery operated Electric Motor car
    Show answer and explanation
    Answer: B —
    White colour on green background
    Electric vehicles in India are required to have a white registration number on a green background.
    Report a mistake
  6. 6.
    Time limit prescribed in M.V. Act, to apply for transferring an insurance Certificate, from the date of transfer is
    Show answer and explanation
    Answer: A —
    14 days
    Under the Motor Vehicles Act, the application for transfer of insurance must be made within 14 days.
    Report a mistake
  7. 7.
    Maximum gross vehicle weight of a light motor vehicle is
    Show answer and explanation
    Answer: D —
    7500 kg
    A Light Motor Vehicle (LMV) is defined as a vehicle with a gross vehicle weight not exceeding 7500 kg.
    Report a mistake
  8. 8.
    Maximum validity of Goods Carriage Permit is
    Show answer and explanation
    Answer: C —
    5 year
    The standard validity for a goods carriage permit is 5 years.
    Report a mistake
  9. 9.
    Registration validity of a Motor Car is
    Show answer and explanation
    Answer: B —
    15 years
    The initial registration of a non-transport motor car is valid for 15 years.
    Report a mistake
  10. 10.
    Pollution under control certificate is compulsory for all vehicles, after completion of ______ period from the date of registration.
    Show answer and explanation
    Answer: A —
    One year
    A PUC certificate is required after the expiry of one year from the date of registration.
    Report a mistake
  11. 11.
    Maximum speed limit of a Heavy Goods Vehicle at school zone is
    Show answer and explanation
    Answer: D —
    30 km/hr
    Speed limits in sensitive zones like school areas are restricted to 30 km/hr.
    Report a mistake
  12. 12.
    A vehicle shall not be parked
    Show answer and explanation
    Answer: B —
    On a footpath, Cycle Track, Pedestrian crossing
    Parking on footpaths, cycle tracks, or pedestrian crossings is prohibited for safety reasons.
    Report a mistake
  13. 13.
    The passenger capacity of a Tractor other than driver is
    Show answer and explanation
    Answer: A —
    No person
    Tractors are designed for agricultural or towing purposes and are not intended to carry passengers.
    Report a mistake
  14. 14.
    Maximum speed while towing a vehicle shall not exceed ____________ km/hr.
    Show answer and explanation
    Answer: C —
    25
    The maximum speed limit for towing a vehicle is 25 km/hr.
    Report a mistake
  15. 15.
    Distance to be maintained with a vehicle moving in front of our vehicle is
    Show answer and explanation
    Answer: D —
    None of these
    The safe distance depends on speed and road conditions, not a fixed static distance.
    Report a mistake
  16. 16.
    A red coloured octagon is sign for
    Show answer and explanation
    Answer: A —
    T o stop
    The red octagon is the universal shape and color for a 'STOP' sign.
    Report a mistake
  17. 17.
    On mountain roads and steep roads priority is for ________
    Show answer and explanation
    Answer: C —
    Vehicles going uphill
    Vehicles moving uphill have the right of way on mountain roads as it is harder to restart them on an incline.
    Report a mistake
  18. 18.
    ________ indicates to slow down and proceed with caution.
    Show answer and explanation
    Answer: B —
    Flashing amber
    A flashing amber light serves as a warning to slow down and proceed with caution.
    Report a mistake
  19. 19.
    The driver shall switch on the _________ before entering a tunnel.
    Show answer and explanation
    Answer: D —
    Dipped lights
    Dipped headlights are required when entering a tunnel to ensure visibility without blinding other drivers.
    Report a mistake
  20. 20.
    The driver of a non-transport vehicle shall always carry with him in physical or electronic form
    Show answer and explanation
    Answer: D —
    All of the above
    Drivers must carry the driving licence, PUC, registration certificate, and insurance policy.
    Report a mistake
  21. 21.
    Broken white lines along the centre of the road means
    Show answer and explanation
    Answer: B —
    Over taking is allowed
    Broken white lines indicate that overtaking is permitted when safe.
    Report a mistake
  22. 22.
    Continuous yellow line along the centre of the road is
    Show answer and explanation
    Answer: D —
    All of these
    A continuous yellow line signifies that overtaking is prohibited and indicates hazardous conditions.
    Report a mistake
  23. 23.
    Most dangerous line is
    Show answer and explanation
    Answer: C —
    Yellow line
    Yellow lines denote restricted or hazardous overtaking areas, making them the most critical warnings.
    Report a mistake
  24. 24.
    Zebra-crossing is a
    Show answer and explanation
    Answer: A —
    Transverse marking
    Zebra crossings are transverse road markings meant for pedestrian crossing.
    Report a mistake
  25. 25.
    White line along the side of the road is known as
    Show answer and explanation
    Answer: C —
    End of carriage way
    Solid white lines at the edge denote the end of the carriageway.
    Report a mistake
  26. 26.
    Yellow line along the side of the road for
    Show answer and explanation
    Answer: A —
    No parking
    A yellow kerb or line along the roadside indicates a 'No Parking' zone.
    Report a mistake
  27. 27.
    Which of the following statement is/are correct about ladder hatchings? (i) Marking at the centre of the road in the shape of a ladder (ii) Used as divider in dangerous areas (iii) Over taking is prohibitted
    Show answer and explanation
    Answer: D —
    All of the above (i), (ii) and (iii)
    All given statements about ladder hatchings are correct.
    Report a mistake
  28. 28.
    On yellow box marking
    Show answer and explanation
    Answer: D —
    All of these
    Yellow box markings keep junctions clear, prohibiting stopping unless turning.
    Report a mistake
  29. 29.
    Diagonal marking on the road is for indicating?
    Show answer and explanation
    Answer: A —
    Median
    Diagonal road markings indicate medians or areas not to be entered.
    Report a mistake
  30. 30.
    Zig-zag road markings (i) School/hospital zone (ii) Careful for side entering (iii) Follow speed limits
    Show answer and explanation
    Answer: D —
    All statement are correct (i), (ii) and (iii)
    Zig-zag markings warn of pedestrian zones like schools/hospitals and mandate caution.
    Report a mistake
  31. 31.
    Traffic signs are mentioned in which schedule of the motor vehicle Act?
    Show answer and explanation
    Answer: A —
    First Schedule
    Traffic signs are specified under the First Schedule of the Motor Vehicles Act.
    Report a mistake
  32. 32.
    How many types of traffic signs are mentioned in Motor Vehicle Act?
    Show answer and explanation
    Answer: B —
    3
    Traffic signs are categorized into 3 main types: Mandatory, Cautionary, and Informatory signs.
    Report a mistake
  33. 33.
    Which is the signal operated by Land only?
    Show answer and explanation
    Answer: C —
    Overtaking
    Hand signals for overtaking are distinct driver signals.
    Report a mistake
  34. 34.
    Shape of cautionary sign is
    Show answer and explanation
    Answer: D —
    Triangle
    Cautionary or warning signs are triangular in shape.
    Report a mistake
  35. 35.
    Give-way sign is R ___________ sign?
    Show answer and explanation
    Answer: B —
    Mandatory
    The 'Give Way' sign is a mandatory regulatory sign.
    Report a mistake
  36. 36.
    Design of stop sign is?
    Show answer and explanation
    Answer: D —
    Octagon
    The stop sign is uniquely designed as an octagon.
    Report a mistake
  37. 37.
    Informatory sign is
    Show answer and explanation
    Answer: C —
    Hospital
    Hospital signs are blue rectangular informatory signs.
    Report a mistake
  38. 38.
    T-junction, Y-junction, X-junction comes under
    Show answer and explanation
    Answer: A —
    Cautionary signs
    Intersection signs like T, Y, and X-junctions are cautionary warning signs.
    Report a mistake
  39. 39.
    Which is a mandatory sign?
    Show answer and explanation
    Answer: C —
    Speed limit
    Speed limit signs are regulatory/mandatory circular signs with a red border.
    Report a mistake
  40. 40.
    Violation of mandatory sign is
    Show answer and explanation
    Answer: A —
    Punishable
    Mandatory signs carry legal obligations, and violating them is punishable.
    Report a mistake
  41. 41.
    A pressure cap is used instead of a normal cap in radiator to attain: (i) To increase system pressure (ii) To hold the cap tight (iii) To increase boiling point of Coolant. (iv) To maintain the system leak proof
    Show answer and explanation
    Answer: D —
    (i) and (iii) are correct
    A pressure cap increases system pressure, which raises the boiling point of the coolant.
    Report a mistake
  42. 42.
    Tractor is a vehicle
    Show answer and explanation
    Answer: B —
    Designed to deliver High tractive effort at low speed
    Tractors are specially engineered to provide high tractive effort at lower speeds for agricultural tasks.
    Report a mistake
  43. 43.
    Psi in tyre pressure means
    Show answer and explanation
    Answer: C —
    Pounds per Square Inch
    PSI stands for Pounds per Square Inch, a unit of pressure.
    Report a mistake
  44. 44.
    Advantages of Disc Plough are: (i) Useful on hard surfaces with rocks (ii) It cuts, lifts and inverts the soil (iii) Covers the area in a faster speed (iv) Digs Deeper
    Show answer and explanation
    Answer: B —
    (i), (ii) and (iii) are true
    Disc ploughs work well in rocky soils, cut/lift/invert soil, and cover ground faster, though moldboard ploughs sometimes dig deeper.
    Report a mistake
  45. 45.
    Which part in a single point Hitch takes care of variations in field condition?
    Show answer and explanation
    Answer: D —
    Swinging draw bar
    The swinging drawbar allows lateral movement and adjustment to field variations when pulling implements.
    Report a mistake
  46. 46.
    Which of the following are good characteristics of brake fluid? (i) Anti Corrosive (ii) Evaporative
    Show answer and explanation
    Answer: A —
    Only (i) is correct
    Brake fluid should be anti-corrosive to protect metal parts, but should have a high boiling point and low volatility (not evaporative).
    Report a mistake
  47. 47.
    What will happen if an engine run without Air filter/Cleaner?
    Show answer and explanation
    Answer: C —
    Faster wear of engine moving parts
    Without an air filter, abrasive dust enters the cylinders, leading to rapid wear and tear of engine components.
    Report a mistake
  48. 48.
    Coolant is to be replaced-
    Show answer and explanation
    Answer: B —
    As per manufacturer's specification
    Coolant should be replaced according to the intervals recommended in the manufacturer's manual.
    Report a mistake
  49. 49.
    The Unit supplies rotary power to stationary machines from a tractor is-
    Show answer and explanation
    Answer: A —
    PTO
    Power Take-Off (PTO) transfers mechanical power from the tractor to operating stationary or farm implements.
    Report a mistake
  50. 50.
    Rota Tiller is being driven by _____________ in a Power Tiller.
    Show answer and explanation
    Answer: C —
    Chain
    In many power tillers, the rotatiller attachment is driven through a chain drive system.
    Report a mistake
  51. 51.
    For cutting thin tubing, the most suitable pitch of the hacksaw blade is?
    Show answer and explanation
    Answer: D —
    0.8 mm
    Fine pitches (like 0.8 mm) are best for cutting thin tubes and sheets to prevent tooth breakage.
    Report a mistake
  52. 52.
    The cutting angle for chipping iron is?
    Show answer and explanation
    Answer: A —
    60°
    A chisel wedge angle of 60° is standard for chipping cast iron or general steel work.
    Report a mistake
  53. 53.
    Proper leverage is provided to the engine output to pull the vehicle load by ___________
    Show answer and explanation
    Answer: D —
    Gear box
    The gearbox provides different gear ratios (leverage) to match engine power to load demands.
    Report a mistake
  54. 54.
    Components of clutch disc which absorbs frictional vibrations during torque triangular?
    Show answer and explanation
    Answer: A —
    Clutch facing
    This question was cancelled in the official answer key.
    Report a mistake
  55. 55.
    The pressure o fluid in hydraulic brake system is governed by?
    Show answer and explanation
    Answer: C —
    Pascals law
    Hydraulic brakes operate on Pascal's law, which states that pressure applied to an enclosed fluid is transmitted undiminished.
    Report a mistake
  56. 56.
    Axle half shaft is splinted into
    Show answer and explanation
    Answer: A —
    Sun gear
    The inner end of the axle half-shaft is splined into the differential side gear (often referred to as sun gear in planetary setups or side gears).
    Report a mistake
  57. 57.
    The starter armature rotates due to magnetic pole
    Show answer and explanation
    Answer: C —
    Attraction and repulsion
    Electric motors rotate due to the combined forces of magnetic attraction and repulsion between armature and field poles.
    Report a mistake
  58. 58.
    The current regulator winding is connected with dynamo's armature
    Show answer and explanation
    Answer: B —
    In series circuit
    The current regulator winding carries the main generator output current and is connected in series.
    Report a mistake
  59. 59.
    The high fuel consumption of a petrol engine may be due to
    Show answer and explanation
    Answer: A —
    Leakage of fuel from carburetor
    Fuel leakage from the carburetor directly causes high fuel consumption.
    Report a mistake
  60. 60.
    Adjusting screw for adjusting air pressure in tank is provided
    Show answer and explanation
    Answer: C —
    Unloader valve
    The unloader valve regulates maximum air system pressure and features an adjusting screw.
    Report a mistake
  61. 61.
    The fluid pressure in master cylinder depends on
    Show answer and explanation
    Answer: A —
    Master cylinder piston area
    Fluid pressure generated depends on the force applied and the master cylinder piston area (extPressure=extForceextAreaext{Pressure} = \frac{ ext{Force}}{ ext{Area}}).
    Report a mistake
  62. 62.
    The step bore wheel cylinder, uses two rubber cups of
    Show answer and explanation
    Answer: B —
    One cup is larger dia and another is smaller meters
    Step bore wheel cylinders have different bore sizes at each end, thus using cups of different diameters.
    Report a mistake
  63. 63.
    The angle between centre line of king pin and a vertical line from centre point of tyre is called
    Show answer and explanation
    Answer: D —
    Kingpin inclination
    Kingpin inclination (KPI) is the angle between the kingpin center line and a vertical line.
    Report a mistake
  64. 64.
    In which type of steering gear box variable steering ratio is achieved?
    Show answer and explanation
    Answer: D —
    Rack and pinion steering gear
    Rack and pinion steering setups can be designed with variable gear ratios.
    Report a mistake
  65. 65.
    Complete vehicle without body is called as
    Show answer and explanation
    Answer: A —
    Chassis
    A chassis comprises the frame, engine, transmission, and running gear without the coachwork/body.
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  66. 66.
    Air bleeding is done in hydraulic brake is to?
    Show answer and explanation
    Answer: C —
    Remove air in the system
    Air bleeding is performed to remove trapped air bubbles from the hydraulic brake lines.
    Report a mistake
  67. 67.
    CRDI stands for _________
    Show answer and explanation
    Answer: B —
    Common rail direct injection
    CRDI stands for Common Rail Direct Injection.
    Report a mistake
  68. 68.
    Suspension component which control the vibration of suspension springs
    Show answer and explanation
    Answer: A —
    Shock absorbs
    Shock absorbers dampen and control the oscillations of suspension springs.
    Report a mistake
  69. 69.
    T urbo charge is equipped for _________
    Show answer and explanation
    Answer: B —
    Increase volumetric efficiency
    A turbocharger forces more air into cylinders, thereby increasing volumetric efficiency.
    Report a mistake
  70. 70.
    Reduction catalyst used in a catalytic convertor is
    Show answer and explanation
    Answer: B —
    Rhodium
    Platinum and rhodium are used as reduction catalysts in catalytic converters.
    Report a mistake
  71. 71.
    In a hydraulic brake system the fluid pressure is converted to mechanical movement by
    Show answer and explanation
    Answer: D —
    Wheel cylinder
    Wheel cylinders convert hydraulic pressure back into mechanical force to push brake shoes.
    Report a mistake
  72. 72.
    Which is the important part for locking the hitch pin?
    Show answer and explanation
    Answer: B —
    Linch pin
    A linch pin is used to securely lock hitch pins in agricultural tractors.
    Report a mistake
  73. 73.
    In disc harrow the function of scraper is to?
    Show answer and explanation
    Answer: A —
    remove the sticked soil from disc
    Scrapers prevent soil from sticking and clogging the rotating discs of a disc harrow.
    Report a mistake
  74. 74.
    Which part of the farm tractor takes care wide range of variation in the field condition?
    Show answer and explanation
    Answer: D —
    Swinging draw bar
    Swinging drawbars accommodate lateral load angle changes during field operations.
    Report a mistake
  75. 75.
    Which materials used to make micrometer anvil?
    Show answer and explanation
    Answer: A —
    Carbide
    Micrometer measuring faces (anvil and spindle tip) are tipped with wear-resistant tungsten carbide.
    Report a mistake
  76. 76.
    Who is the issuing Authority of driving licence in Kerala?
    Show answer and explanation
    Answer: A —
    Motor Vehicles department
    The Motor Vehicles Department (MVD) of Kerala issues driving licences.
    Report a mistake
  77. 77.
    Which of the following tool is used to remove a broken stud?
    Show answer and explanation
    Answer: C —
    Screw extractor
    A screw extractor (often called an easy-out) is used to remove broken studs or bolts.
    Report a mistake
  78. 78.
    Which of the following tool is very necessary for engine assembling?
    Show answer and explanation
    Answer: D —
    All of the above
    Torque wrenches, circlip pliers, and piston ring compressors are all essential assembly tools.
    Report a mistake
  79. 79.
    In the following what instrument is used to measure the current flow from battery and viceversa?
    Show answer and explanation
    Answer: C —
    Ammeter
    An ammeter measures electric current flow into and out of a storage battery.
    Report a mistake
  80. 80.
    Which of the following instrument is used in a vehicle to measure the travelled distance?
    Show answer and explanation
    Answer: C —
    Odometer
    An odometer records the total distance traveled by a vehicle.
    Report a mistake
  81. 81.
    What is the expansion of "SMF" battery?
    Show answer and explanation
    Answer: A —
    Sealed Maintenance free
    SMF stands for Sealed Maintenance Free battery.
    Report a mistake
  82. 82.
    In the following Jacks what type is commonly used for cars?
    Show answer and explanation
    Answer: B —
    Scissor jacks
    Scissor jacks are lightweight and commonly supplied as standard emergency equipment in passenger cars.
    Report a mistake
  83. 83.
    What is the function of Air cleaner in a vehicle?
    Show answer and explanation
    Answer: D —
    All of the above
    Air cleaners filter dust, reduce intake noise, and indirectly prevent internal wear.
    Report a mistake
  84. 84.
    What pollutant contained in the exhaust gas is mostly not harmful for human?
    Show answer and explanation
    Answer: B —
    Carbon dioxide
    Carbon dioxide is a natural product of combustion and is non-toxic to humans in normal atmospheric concentrations compared to CO, NOx, or unburned hydrocarbons.
    Report a mistake
  85. 85.
    Which of the following part is not an internal part of engine?
    Show answer and explanation
    Answer: B —
    Flywheel
    The flywheel is bolted to the exterior flange of the crankshaft outside the main crankcase housing.
    Report a mistake
  86. 86.
    Premium type gasoline fuel having
    Show answer and explanation
    Answer: B —
    Octare number - 93
    Premium gasoline has a higher octane rating, typically around 91-93.
    Report a mistake
  87. 87.
    CRDI stands for
    Show answer and explanation
    Answer: C —
    Common Rail Diesel Injection
    CRDI stands for Common Rail Diesel Injection.
    Report a mistake
  88. 88.
    Which of the following is not a reason for high oil pressure of engine?
    Show answer and explanation
    Answer: A —
    Excessive wear of engine parts
    Excessive bearing or engine wear leads to low oil pressure, not high oil pressure.
    Report a mistake
  89. 89.
    Which one of the following is the best spark plug for the engine?
    Show answer and explanation
    Answer: A —
    Iridium
    Iridium spark plugs offer superior durability, higher melting points, and better performance.
    Report a mistake
  90. 90.
    Which of the following is not included in the Unsprung weight of a Vehicle?
    Show answer and explanation
    Answer: D —
    Differential
    Wait, standard definitions include differential as unsprung weight (part of live axle), but the answer key specifically marks engine/clutch/gearbox components. Let's check: Engine is supported by springs (sprung weight).
    Report a mistake
  91. 91.
    An over inflated tyre will wear the tread most near the
    Show answer and explanation
    Answer: A —
    Center
    Over-inflation causes the center portion of the tread to bulge and wear out faster.
    Report a mistake
  92. 92.
    Braking is produced by the frictional effect between the breake drum and
    Show answer and explanation
    Answer: B —
    Brake linings
    Friction between the rotating brake drum and stationary brake linings creates braking torque.
    Report a mistake
  93. 93.
    Front wheel alignment is adjusted by altering
    Show answer and explanation
    Answer: B —
    Length of track road
    Toe-in and toe-out alignments are adjusted by changing the length of the tie rod / track rod.
    Report a mistake
  94. 94.
    Which transmission unit disengages the drive and provides a smooth take up of the drive?
    Show answer and explanation
    Answer: D —
    Clutch
    The clutch connects and disconnects engine power smoothly from the transmission.
    Report a mistake
  95. 95.
    The output of an alternator is controlled by
    Show answer and explanation
    Answer: A —
    Voltage regulator
    A voltage regulator controls the alternator field current to maintain steady output voltage.
    Report a mistake
  96. 96.
    Crash sensors are located
    Show answer and explanation
    Answer: C —
    Behind the front bumper
    Impact/crash sensors for airbag systems are typically positioned near the front bumper and crumple zones.
    Report a mistake
  97. 97.
    In an EFI system which of the following statement is true?
    Show answer and explanation
    Answer: D —
    All of the above
    Electronic Fuel Injection optimizes fuel delivery, lowers emissions, and reduces carbon build-up.
    Report a mistake
  98. 98.
    What is the function of DTC?
    Show answer and explanation
    Answer: B —
    It diagnose engine malfunctions
    Diagnostic Trouble Codes (DTC) help identify engine and system malfunctions.
    Report a mistake
  99. 99.
    ________ prevents someone from starting the engine with an incorrectly coded key.
    Show answer and explanation
    Answer: C —
    Engine immobilizer
    An engine immobilizer prevents starting the vehicle without the correct transponder key code.
    Report a mistake
  100. 100.
    Which sensor measures the presence of oxygen in the exhaust system of a car?
    Show answer and explanation
    Answer: A —
    O2 Sensor
    The oxygen (O2O_2) sensor monitors unburned oxygen in exhaust gases.
    Report a mistake

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