Important Trivia Quiz On Small Gas Engine!

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Important Trivia Quiz On Small Gas Engine! - Quiz

Below is an important trivia quiz on a small gas engine that is perfect for ensuring that you get to review all that you have learned so far regarding this type of engine. Do you feel like you have enough knowledge to answer it correctly? With what you learned, I believe in you. Well, give it a shot and all the best!


Questions and Answers
  • 1. 

    Fuel must be atomized in the engine for the purpose of _______________.

    • A. 

      Producing rapid burning that will cause a sudden, explosive release of heat energy to run the engine.

    • B. 

      Creating new molecular structures to run the engine

    • C. 

      Increasing the gasoline's octane number to run the engine.

    Correct Answer
    A. Producing rapid burning that will cause a sudden, explosive release of heat energy to run the engine.
    Explanation
    The purpose of atomizing fuel in the engine is to ensure that it burns rapidly and releases heat energy in an explosive manner. This rapid burning is necessary to generate the power needed to run the engine efficiently. By breaking the fuel into small particles or droplets, it increases its surface area, allowing for better mixing with air and promoting faster combustion. This results in a sudden release of energy, which is harnessed to power the engine.

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  • 2. 

    Force on the piston is transmitted to the crankshaft by the _______________.

    • A. 

      Piston

    • B. 

      Lightning rod

    • C. 

      Connecting rod

    Correct Answer
    C. Connecting rod
    Explanation
    The force on the piston is transmitted to the crankshaft by the connecting rod. The connecting rod connects the piston to the crankshaft and converts the linear motion of the piston into rotational motion of the crankshaft. This allows the engine to convert the reciprocating motion of the piston into the rotational motion needed to drive the vehicle or machinery.

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  • 3. 

    Name 5 desirable characteristics of gasoline for use in small engines.

    • A. 

      Stop, go, off, on, reverse

    • B. 

      Ignites readily, burns cleanly, resists detonation, vaporizes easily, and must be free of dirt or abrasives

    • C. 

      Ignites slowly, burns with debris, attracts detonation, vaporizes with difficulty, full of dirt and abrasives

    Correct Answer
    B. Ignites readily, burns cleanly, resists detonation, vaporizes easily, and must be free of dirt or abrasives
    Explanation
    The answer provided lists five desirable characteristics of gasoline for use in small engines. Gasoline should ignite readily, meaning it should start burning easily when exposed to a spark or heat source. It should also burn cleanly, producing minimal emissions and pollutants. Resisting detonation is important to prevent premature combustion and engine damage. Vaporizing easily ensures that the gasoline can mix well with air for efficient combustion. Lastly, gasoline must be free of dirt or abrasives to prevent clogging or damage to the engine components.

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  • 4. 

    Small gas engines generally use ____________.

    • A. 

      A lot of fuel

    • B. 

      High octane fuel

    • C. 

      Low octane fuel

    Correct Answer
    C. Low octane fuel
    Explanation
    Small gas engines generally use low octane fuel. Low octane fuel is preferred for small engines because it burns at a slower rate, preventing knocking or pinging in the engine. Knocking occurs when the air-fuel mixture in the engine's cylinders ignites prematurely, which can cause damage to the engine. Using low octane fuel helps to prevent this issue and ensures smooth and efficient engine performance.

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  • 5. 

    What effect did lead (tetraethyl lead) have when introduced to gasoline?

    • A. 

      It increased the gasoline's octane number.

    • B. 

      It decreased the gasoline's octane number.

    • C. 

      It made no change to the gasoline's octane number

    Correct Answer
    A. It increased the gasoline's octane number.
    Explanation
    When lead (tetraethyl lead) was introduced to gasoline, it had the effect of increasing the gasoline's octane number. This means that the lead additive improved the fuel's resistance to knocking or pinging, which is the undesirable noise and vibration that can occur in an engine. By increasing the octane number, the lead additive allowed for better engine performance and efficiency.

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  • 6. 

    What is the main reason that unleaded gasoline was introduced?

    • A. 

      To save money

    • B. 

      To reduce the amount of gas needed for automobiles

    • C. 

      To provide fuel for automobiles equipped with catalytic converters

    Correct Answer
    C. To provide fuel for automobiles equipped with catalytic converters
    Explanation
    Unleaded gasoline was introduced primarily to provide fuel for automobiles equipped with catalytic converters. Catalytic converters are emission control devices that help reduce harmful pollutants in vehicle exhaust. Leaded gasoline contains additives like tetraethyl lead, which can damage the catalytic converters. Therefore, the introduction of unleaded gasoline was necessary to ensure the proper functioning of these emission control devices and reduce pollution.

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  • 7. 

    What adverse effects can result f rom using gasoline with alcohol blends?

    • A. 

      Gasoline with alcohol blends can cause cars to stop running.

    • B. 

      Gasoline with alcohol blends can absorb moisture, corrode fuel tank linings, shrink carburetor floats and seals, increase carbon deposits and pit metal parts.

    • C. 

      Gasoline with alcohol blends might increase drunk driving accidents.

    Correct Answer
    B. Gasoline with alcohol blends can absorb moisture, corrode fuel tank linings, shrink carburetor floats and seals, increase carbon deposits and pit metal parts.
    Explanation
    Gasoline with alcohol blends can have adverse effects on vehicles. It can absorb moisture, leading to corrosion of fuel tank linings and causing damage to carburetor floats and seals. Additionally, it can increase carbon deposits and pit metal parts, further impacting the performance and longevity of the vehicle.

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  • 8. 

    The bearings that support the crankshaft are called____________ bearings.

    • A. 

      Crankshaft

    • B. 

      Ball

    • C. 

      Roller

    Correct Answer
    C. Roller
    Explanation
    The bearings that support the crankshaft are called roller bearings. Roller bearings are designed to handle heavy loads and provide smooth rotation for the crankshaft. They consist of cylindrical rollers that distribute the load evenly, reducing friction and allowing the crankshaft to rotate freely. This type of bearing is commonly used in engines and other heavy-duty applications where high load capacity and durability are required.

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  • 9. 

    The cylinder block is generally made of ___________ or ____________?

    • A. 

      Krptonite, oil

    • B. 

      Stone, aluminum foil

    • C. 

      Cast iron, aluminum alloy

    Correct Answer
    C. Cast iron, aluminum alloy
    Explanation
    The cylinder block is typically made of cast iron or aluminum alloy. Cast iron is used for its strength and durability, as it can withstand high temperatures and pressures. Aluminum alloy, on the other hand, is used for its lightweight properties, which helps improve fuel efficiency and overall performance. By combining these two materials in the cylinder block, manufacturers can achieve a balance between strength and weight, resulting in a reliable and efficient engine.

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  • 10. 

    When are sleeved cylinders used?

    • A. 

      When cylinder block is cast iron

    • B. 

      When cylinder block is aluminum

    • C. 

      When cylinder block is stone

    Correct Answer
    B. When cylinder block is aluminum
    Explanation
    Sleeved cylinders are used when the cylinder block is made of aluminum. This is because aluminum has lower wear resistance compared to cast iron or stone. By using sleeved cylinders, which are made of a more durable material such as cast iron, the lifespan and performance of the engine can be improved. The sleeve provides a protective layer between the piston and the cylinder wall, reducing friction and wear.

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  • 11. 

    Why are sleeved cylinders used?

    • A. 

      To provide a suitable surface for cylinder wall. Aluminum would wear out quickly

    • B. 

      To warm the cylinder wall

    • C. 

      To add weight and security to the cylinder wall

    Correct Answer
    A. To provide a suitable surface for cylinder wall. Aluminum would wear out quickly
    Explanation
    Sleeved cylinders are used to provide a suitable surface for the cylinder wall. Aluminum, which is commonly used for cylinder walls, would wear out quickly without a sleeve. The sleeve acts as a protective layer, preventing direct contact between the piston and the cylinder wall, reducing friction and wear. This ensures the longevity and durability of the cylinder, allowing it to function effectively for a longer period of time.

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  • 12. 

    Why are metal fins made as a part of the cylinder?

    • A. 

      For speed and agility

    • B. 

      For appearance

    • C. 

      For efficient air circulation and heat control

    Correct Answer
    C. For efficient air circulation and heat control
    Explanation
    Metal fins are made as a part of the cylinder for efficient air circulation and heat control. The fins increase the surface area of the cylinder, allowing more air to come into contact with it. This increased contact area facilitates better heat dissipation, preventing the cylinder from overheating. Additionally, the fins help in directing the airflow around the cylinder, improving air circulation and cooling efficiency. Overall, the presence of metal fins enhances the cylinder's ability to regulate its temperature and maintain optimal operating conditions.

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  • 13. 

    _________________ are designed into the crankshaft to provide for engine balancing.

    • A. 

      Fins

    • B. 

      Counterweights

    • C. 

      Cranks

    Correct Answer
    B. Counterweights
    Explanation
    Counterweights are designed into the crankshaft to provide engine balancing. Engine balancing is crucial for smooth operation and to reduce vibrations. Counterweights are used to offset the uneven weight distribution caused by the pistons and connecting rods. They are strategically placed on the crankshaft to balance out the forces generated by the reciprocating motion of the pistons. This helps in reducing engine vibrations, improving overall performance, and increasing the lifespan of the engine components.

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  • 14. 

    Why do some pistons have a contoured face?

    • A. 

      To provide more air in the combustion chamber

    • B. 

      To aid style and appearance to the piston

    • C. 

      To provide efficient flow of gases entering and leaving the combustion chamber

    Correct Answer
    C. To provide efficient flow of gases entering and leaving the combustion chamber
    Explanation
    Some pistons have a contoured face to provide efficient flow of gases entering and leaving the combustion chamber. The contours on the face of the piston help to create turbulence and swirl in the air-fuel mixture, promoting better mixing and combustion. This leads to improved engine performance, fuel efficiency, and reduced emissions.

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  • 15. 

    The ______________ will cause the valve to rise and fall, opening and closing the ports.

    • A. 

      Camera

    • B. 

      Cam lobe

    • C. 

      Ear lobe

    Correct Answer
    B. Cam lobe
    Explanation
    The cam lobe is responsible for causing the valve to rise and fall, opening and closing the ports. The cam lobe is a protrusion on a rotating camshaft that interacts with other engine components to control the valve timing and operation. As the camshaft rotates, the cam lobe pushes against the valve, causing it to move up and down, thus controlling the flow of air and fuel into the engine.

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  • 16. 

    The angled face of each valve will close tightly against a smooth _________ cut around each port opening.

    • A. 

      Seal

    • B. 

      Seat

    • C. 

      Rim

    Correct Answer
    B. Seat
    Explanation
    The angled face of each valve will close tightly against a smooth seat cut around each port opening. The term "seat" refers to the surface against which the valve closes to create a tight seal. This ensures that no leakage occurs between the valve and the port opening, maintaining the integrity of the system. A properly cut and smooth seat is essential for effective sealing and preventing any flow through the valve when it is closed.

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  • 17. 

    Which is larger, the camshaft gear or the crankshaft gear? 

    • A. 

      Camshaft gear is slight larger

    • B. 

      Camshaft gear is twice as large

    • C. 

      Crankshaft gear is slightly larger

    Correct Answer
    B. Camshaft gear is twice as large
    Explanation
    The explanation for the given correct answer is that the camshaft gear is twice as large as the crankshaft gear. This means that the diameter or size of the camshaft gear is double that of the crankshaft gear.

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  • 18. 

    What are the three tasks which are performed by the flywheel?

    • A. 

      Speed, durability and finese

    • B. 

      Stop, go, go again

    • C. 

      During non-power strokes the flywheel keeps the crankshaft spinning and smoothes engine operation; its metal fins act like a fan to cool the engine; and its magnets produce electrical current for the ignition system.

    Correct Answer
    C. During non-power strokes the flywheel keeps the crankshaft spinning and smoothes engine operation; its metal fins act like a fan to cool the engine; and its magnets produce electrical current for the ignition system.
    Explanation
    The flywheel performs three tasks in an engine. Firstly, during non-power strokes, it keeps the crankshaft spinning and helps in smoothing the engine operation. Secondly, its metal fins act as a fan to cool the engine. Lastly, the magnets in the flywheel produce electrical current for the ignition system.

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