Take This Gas Engine Trivia Quiz!

17 Questions | Total Attempts: 763

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Take This Gas Engine Trivia Quiz!

The world today is undergoing a big threat all these thanks to the carbon print that we are leaving every day. Some of this is due to the dangerous chemicals we let out to the world that is destroying the ozone layer. One of the best inventions to combat this is the gas engines. Take this gas engine trivia quiz and get to see just how much you understand how it works.


Questions and Answers
  • 1. 
    Name the four strokes of a four-cycle engine in proper order.
    • A. 

      Compression, power, exhaust, intake

    • B. 

      Intake, compression, exhaust and power

    • C. 

      Intake, compression, power and exhaust

  • 2. 
    Name three important intake valve functions.
    • A. 

      Open, close, open again

    • B. 

      Must open at correct instant to permit intake of air-fuel mixture; must close at correct time and seal during compression; its shape must be streamlined so flow of gases into combustion chamber will not be obstructed.

    • C. 

      Must open at the correct time and close when the airflow is diminished

  • 3. 
    Explain why a 4-cycle engine runs cooler than a 2-cycle engine.
    • A. 

      There are half as many power strokes, and the valves dissipate heat through seats and guides.

    • B. 

      Burned gases are also removed before a fresh charge is introduced.

    • C. 

      There are half as many power strokes, and the valves dissipate heat through seats and guides. Burned gases are also removed before a fresh charge is introduced.

  • 4. 
    Why is there a difference in temperature between the intake and exhaust valves.
    • A. 

      Outgoing air-fuel mixture tends to heat intake valve during operation

    • B. 

      Incoming air-fuel mixture tends to cool intake valve during operation

    • C. 

      Incoming air-fuel mixture tends to heat intake valve during operation

  • 5. 
    The exhaust valve is cooled mainly by _____________.
    • A. 

      Radiation

    • B. 

      Conduction

    • C. 

      Convection

  • 6. 
    How does compression increase engine power?
    • A. 

      When atoms that make up molecules of air and fuel are squeezed close together, heat energy is created. Then, tightly packed molecules try to move apart. This energy, combined with the expanding energy of combustion, provides power.

    • B. 

      Compression adds more pressure to the crankshaft, thus increasing power.

    • C. 

      Compression adds more power to the camshaft, thus increasing torque and power.

  • 7. 
    The compression ratio must be limited in gasoline spark ignition engines, because__________
    • A. 

      The engine becomes too difficult to start.

    • B. 

      There is no power advantage after compressing the fuel to a certain point.

    • C. 

      The heat of compression will ignite the air-fuel mixture too soon.

  • 8. 
    What are the two methods employed for lubricating four-cycle engines?
    • A. 

      The fuel and pump system

    • B. 

      The splash system and the pump system

    • C. 

      The splash system and the electronic system

  • 9. 
    What are the two types of scavenging systems used in two-cycle engines?
    • A. 

      The cross-scavenged and the loop-scavenged

    • B. 

      The cross-splash and the loop cylinder

    • C. 

      The sound wave and valve overlap

  • 10. 
    Why can two-cycle engines be run in any position?
    • A. 

      Because there is no oil in the fuel that passes through the engine.

    • B. 

      Because they get adequate lubrication as fuel mixed with oil is passed through the engine.

    • C. 

      Because the is no fuel mixed with the oil that passed through the engine.

  • 11. 
    Name three valving systems employed in two-cycle engines.
    • A. 

      Fuel mixture, valve overlap

    • B. 

      Intake system, output system and conduction system

    • C. 

      Rotary valve system, reed valve system, the loop-scavenged system

  • 12. 
    The baffle on the contoured piston is for ____________.
    • A. 

      Directing the flow of air-fuel mixture upward in the cylinder.

    • B. 

      Slowing the air-fuel mixture entering the combustion chamber.

    • C. 

      Directing oil evenly to the cylinder walls.

  • 13. 
    The ___________  ___________  type of 2-cycle engines requires a contoured piston.
    • A. 

      Air flow

    • B. 

      Piston engine

    • C. 

      Cross-scavanged

  • 14. 
    In a properly tuned exhaust system, ________ _______ prevent the air-fuel mixture from leaving with the exhaust.
    • A. 

      Cross-scavanged

    • B. 

      Sound waves

    • C. 

      Air flow

  • 15. 
    What advantage is there in having the intake port lead directly into the crankshaft?
    • A. 

      Charge of fuel and oil lubricates ball and needle bearings until piston opens transfer ports on down-stroke.

    • B. 

      Charge of oil lubricates ball and needle bearings until piston opens transfer ports on down-stroke.

    • C. 

      Charge of fuel ball and needle bearings until piston opens transfer ports on down-stroke.

  • 16. 
    Time during the four-stroke cycle when both valves are open is called __________________.
    • A. 

      Piston overlap

    • B. 

      Valve overlap

    • C. 

      Fuel overlap

  • 17. 
    A four-cycle engine accerlerates slower than a two-cycle engine because___________________/
    • A. 

      There is only one power stroke in four

    • B. 

      The flywheel is heavier to carry the engine through three nonpower strokes

    • C. 

      There are more moving parts to be driven by the engine

    • D. 

      All of the above

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