Sae IIT(Bhu) Quiz 1

25 Questions | Total Attempts: 82

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Sae IIT(Bhu) Quiz 1


Questions and Answers
  • 1. 
    The following figure depicts components of an engine. If the crank radius is R and stroke length (the distance between TDC and BDC) is S then find the relation between R and S.
    • A. 

      S=2*R

    • B. 

      S=R/2

    • C. 

      S=4*R

    • D. 

      S=R/4

  • 2. 
    A four-stroke engine delivers an output of 1200 RPM from the crankshaft. What is the total number of power strokes provided by the engine in 1 second?
    • A. 

      10

    • B. 

      20

    • C. 

      5

    • D. 

      12

  • 3. 
    What is the function of the flywheel?
    • A. 

      Improves traction with the surface on which the car is moving.

    • B. 

      Balances the weight against the crank shaft.

    • C. 

      Stores rotational energy generated by the engine.

    • D. 

      It is a type of braking system used in automobiles.

  • 4. 
    Why is carburetor used in automobiles?
    • A. 

      It is used to discharge fuel in petrol engines in an adequate quantity.

    • B. 

      It is used to discharge fuel in Diesel engines in an adequate quantity.

    • C. 

      It is used to prepare air-fuel mixture in a fixed ratio in petrol engines.

    • D. 

      It is used to prepare air-fuel mixture in a fixed ratio in diesel engines.

  • 5. 
    Which of the following components control the motion of intake and exhaust valves?
    • A. 

      Piston

    • B. 

      Crankshaft

    • C. 

      Camshaft

    • D. 

      Flywheel

  • 6. 
    Which engine delivers the maximum efficiency based on fuel among the following:
    • A. 

      Two-stroke diesel engine

    • B. 

      Two-stroke petrol engine

    • C. 

      Four-stroke diesel engine

    • D. 

      Four-stroke petrol engine

  • 7. 
    There are two gears with radius R1 and R2 and the number of teeth N1 and N2 respectively. For no slip between the gears which of the following relations are true
    • A. 

      R1/R2 = N1/N2                

    • B. 

      R1/R2 = N2/N1

    • C. 

      R1/R2 = (N1/N2)2

    • D. 

      R1/R2 = (N2/N1)2

  • 8. 
    Kinetic energy recovery system of EVs is also known as
    • A. 

      Amplitude of voltage.

    • B. 

      Amplitude of Current.

    • C. 

      Frequency of AC.

    • D. 

      None of these.

  • 9. 
    HEV (Hybrid Electric Vehicles or HEV) is
    • A. 

      Fully electric with rechargeable batteries.

    • B. 

      Powered by both petrol and electricity.

    • C. 

      Battery recharged only by regenerative braking.

    • D. 

      Charged with electricity from an external source.

  • 10. 
    In BLDC motor field winding is kept on
    • A. 

      Stator

    • B. 

      Rotor

    • C. 

      Absent

    • D. 

      Can be placed anywhere

  • 11. 
    Typical BLDC doesn’t have
    • A. 

      Commutator.

    • B. 

      Permanent magnet.

    • C. 

      Controller.

    • D. 

      Fixed armature.

  • 12. 
    In a universal joint as shown in the figure, the drive rotates at a constant angular velocity. Which of the following is correct
    • A. 

      The angular velocity of driven shaft must be constant with time

    • B. 

      The angular velocity of driven shaft may vary with time

    • C. 

      The angular velocity of driven shaft must vary with time

    • D. 

      Data is insufficient

  • 13. 
    When a car takes a turn then the centripetal force is provided by the frictional force on the wheels acting towards the center of the turn. Which of the following is correct
    • A. 

      The outer wheels in the turn offer lesser frictional force compared to inner wheels.

    • B. 

      The inner wheels offer lesser frictional force than the outer wheels.

    • C. 

      Both inner and outer wheels offer the same amount of frictional force.

    • D. 

      Rear wheels offer more frictional force than the front one.

  • 14. 
    Which of the following metals can be best used as a cylinder block in an engine?
    • A. 

      Steel

    • B. 

      Aluminium

    • C. 

      Low carbon Steel

    • D. 

      Iron

  • 15. 
    The main function of the brake fluid is
    • A. 

      Lubrication

    • B. 

      Power transmission

    • C. 

      Cooling

    • D. 

      None of these

  • 16. 
    The self ignition temperature of diesel as compared to petrol is
    • A. 

      Higher

    • B. 

      Lower

    • C. 

      Same

    • D. 

      Depends on type of Engine

  • 17. 
    In a petrol engine, the high voltage for spark plug is in the order of
    • A. 

      22 V

    • B. 

      1000 V

    • C. 

      5000 V

    • D. 

      12000 V

  • 18. 
    The basic function of the suspension is to
    • A. 

      Absorb vibration and impact forces from the road surface.

    • B. 

      Ensure that the steering wheel can deliver a suitable amount of steering force.

    • C. 

      Ensure that wheel alignment is not disturbed during driving.

    • D. 

      Lower the center of mass of the chassis.

  • 19. 
    In petrol engines, during suction stroke, __________ is drawn in the cylinder
    • A. 

      Only Air

    • B. 

      Air and fuel

    • C. 

      None of these

    • D. 

      Only fuel

  • 20. 
    In which of the following engine, Power/weight ratio is greatest
    • A. 

      Spark ignition engine

    • B. 

      Compression ignition engine

    • C. 

      Induction motor 

    • D. 

      Hot steam engine

  • 21. 
     Which among the following has highest energy density
    • A. 

      Diesel

    • B. 

      Petrol

    • C. 

      Battery

    • D. 

      Hydrogen

  • 22. 
    Which of the following can be used for power transmission in intersecting shafts?
    • A. 

      Spur gear

    • B. 

      Helical gear

    • C. 

      Bevel gear

    • D. 

      Rack & pinion gear

  • 23. 
    [Blank]is used to distribute the pressure of a nut evenly over the surface, so that the surface isn't damaged
  • 24. 
    The ease with which petrol vapourizes is called its
    • A. 

      Oxidation

    • B. 

      Octane number

    • C. 

      Volatility

    • D. 

      Option 4

  • 25. 
    During suction stroke, the inside pressure of the cylinder is
    • A. 

      More than the atmospheric pressure.

    • B. 

      Less than the atmospheric pressure.

    • C. 

      Equal to the atmospheric pressure.

    • D. 

      None of these

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