Electrical System in an Automobile Quiz

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Questions and Answers

What is the purpose of accumulating a low amp high volt in a condenser?

  • To generate high voltage current at the moment the spark is generated (correct)
  • To weaken the mixture strength because of reduced exhaust pressure
  • To prevent a weak spark when the throttle is opened rapidly at altitude
  • To correct for variations in the fuel-air ratio due to decreased air density at altitude

What is the main function of a turbocharger?

  • Decrease fuel consumption
  • Cause an automatic increase in engine RPM as altitude is gained
  • Maintain a lower temperature of vapor
  • Increase cylinder scavenging efficiency (correct)

How does a charger affect engine thermal efficiency?

  • It raises engine back pressure
  • It lowers friction during gas change
  • It leads to a leaner mixture at higher altitudes
  • It causes an automatic decrease in engine RPM as altitude is gained (correct)

Why would a low temperature of vapor be desirable?

<p>To improve cylinder scavenging (A)</p> Signup and view all the answers

How does adjusting for variations in fuel-air ratio relate to air density?

<p>Air density decreases at higher altitudes, affecting the fuel-air ratio (C)</p> Signup and view all the answers

Why is it necessary to generate a high voltage current at the moment the spark is produced?

<p>To ensure a strong spark is generated for combustion (B)</p> Signup and view all the answers

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Study Notes

Ignition System

  • The ignition system uses a high intensity magnetic field to generate a spark.
  • The spark is generated by breaking the primary circuit, which induces a low amp, high voltage current.

Ignition Coil Function

  • The ignition coil accumulates a low current from the battery and converts it into a high voltage current when the spark is generated.

Spark Generation

  • The spark is generated by setting a high amp, low voltage current in the primary circuit.

Fuel-Air Mixture Adjustment

  • The fuel-air mixture is adjusted to prevent a weak spark when the throttle is opened rapidly at altitude.
  • The adjustment corrects for variations in the fuel-air ratio due to decreased air density.
  • The mixture strength is enriched due to decreased air density at high altitude.

Turbocharger Function

  • A turbocharger increases the engine's thermal efficiency.
  • It does not automatically increase the engine's RPM as altitude is gained.
  • It reduces fuel consumption.

Engine Performance

  • Lower friction is achieved during the gas exchange.
  • Lower back pressure occurs during the gas exchange.
  • A leaner mixture is achieved at higher altitude.

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