I. C. Engine Test

30 Questions | Total Attempts: 71

SettingsSettingsSettings
Please wait...
I. C. Engine Test

Unit Test ( chapter 1 to 6 from syllabus)


Questions and Answers
  • 1. 
    A cycle consisting of two constant volume and two isothermal processes is known as 
    • A. 

      Stirling cycle

    • B. 

      Carnot cycle

    • C. 

      Otto cycle

    • D. 

      Joule cycle

  • 2. 
    Spill port(valve) in helix Bypass pump connects 
    • A. 

      Fuel tank and pump

    • B. 

      Fuel filter and fuel pump

    • C. 

      Common rail to fuel injector

    • D. 

      Fuel pump and fuel injector

  • 3. 
    OHC in engine terminology means 
    • A. 

      Over Lapping head compression

    • B. 

      On Head camshaft

    • C. 

      Over Head Chamber

    • D. 

      Organically Homogeneous Combustionz

  • 4. 
    Ratio of work done by engine to stroke volume gives  
    • A. 

      Mean effective pressure

    • B. 

      Volumetric efficiency

    • C. 

      Volumetric flow rate

    • D. 

      Specific equivalence ratio

  • 5. 
    Which carburetor has triple venturies  
    • A. 

      Solex carburetor

    • B. 

      Carter carburetor

    • C. 

      Zenith carburetor

    • D. 

      S.U. carburetor

  • 6. 
    By increasing suction volume of engine, air standard efficiency of SI engine 
    • A. 

      Increases

    • B. 

      Decreses

    • C. 

      Remains unaffected

    • D. 

      Varies exponantially

  • 7. 
    For same BHP,  the weight to power ratio is less for 
    • A. 

      2 stroke engine

    • B. 

      4 stroke engine

  • 8. 
    In ASTM distillation curve, the order of distillate in ascending order for following are :(a) kerosene(b)high speed diesel(c) gasoline(d) ethyle alchohol  
    • A. 

      D - c- b - a

    • B. 

      A - b- c - d

    • C. 

      B - c -a- d

    • D. 

      A - d - b - c

  • 9. 
    The amount of energy liberated by 1kg of fuel is known as
    • A. 

      Calorific value

    • B. 

      Specific Heat

    • C. 

      Enthalpy

    • D. 

      Heat Capacity

  • 10. 
    Disintegration of combustion products at high temperature is known as  _______________
  • 11. 
    The reference fuels for knock rating of spark ignition engines would include 
    • A. 

      Normal heptane and iso-octane

    • B. 

      Normal octane and aniline

    • C. 

      Iso-octane and normal hexane

    • D. 

      Iso-octane and alpha-methyl naphthalene

  • 12. 
    Which type of engine head is shown in fig
    • A. 

      F head

    • B. 

      L head

    • C. 

      I head

    • D. 

      T head

  • 13. 
    Small electrical resistance heater mounted inside the combustion chamber of many CI engines is known as 
    • A. 

      Glow plug

    • B. 

      Spark plug

    • C. 

      Pressure transduser

    • D. 

      None

  • 14. 
    High-pressure gases in the combustion chamber fromleaking past the piston into the crankcase
    • A. 

      Blow by

    • B. 

      Past over

    • C. 

      Vented by

    • D. 

      None

  • 15. 
    Ideal air standard otto cycle is considered as a close loop cycle.  True or False ?
    • A. 

      True

    • B. 

      False

  • 16. 
    Butterfly valve mounted at the upstream end of the intake system is known as 
    • A. 

      Throttle

    • B. 

      Choke

    • C. 

      Auxiliary

    • D. 

      None

  • 17. 
    Presence of one of the following material can reduce the self ignition temperature and promote knock
    • A. 

      Sulphur

    • B. 

      Nitrogen

    • C. 

      Unburnt HC

    • D. 

      Vapor

  • 18. 
    Clogging inlet manifold channel by rapid fuel evaporation is known as
    • A. 

      Manifold lock

    • B. 

      Vapor lock

    • C. 

      Choking

    • D. 

      None

  • 19. 
    The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the 
    • A. 

      Jet area is automatically varied depending on the suction

    • B. 

      The diameter of the jet is constant and the discharge coefficient is invariant

    • C. 

      The diameter of the jet is constant and the discharge coefficient is invariant

    • D. 

      Flow is produced due to the static head in the float chamber

  • 20. 
    Distribution of fuel particles in cylinder to achieve better fuel-air mixture is known as
    • A. 

      Atomization

    • B. 

      Penetration

    • C. 

      Turbulence

    • D. 

      Dispersion

  • 21. 
    Gum formation occurs due to 
    • A. 

      Oxidation of unsaturated hydrocarbons

    • B. 

      Oxidation of nitrogen

    • C. 

      Oxidation of saturated hydrocarbons

    • D. 

      All of above

  • 22. 
    Air standard efficiency of diesel engine approaches to otto cycle efficiency when
    • A. 

      Cut off ratio is increased

    • B. 

      Cut off ratio is decreased

    • C. 

      Cut off ratio is constant

    • D. 

      Cut off ratio is Zero

  • 23. 
    Which of following is known as indicator diagram
    • A. 

      P -theta

    • B. 

      P-V

    • C. 

      T-s

    • D. 

      P-T

  • 24. 
    In 2 stroke 2 cylinder CI engine, running at 3000 rpm , no of sparks occurs in 5 min
    • A. 

      150000

    • B. 

      30000

    • C. 

      7500

    • D. 

      None

  • 25. 
    "Common fuel consisting of 90% gasoline and 10% alcohol" is known as 
    • A. 

      Gasohol

    • B. 

      Gasoline

    • C. 

      Blend

    • D. 

      Gasalcohol

Back to Top Back to top