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ME-503 (C) · Alternate Automotive Fuels & Emissions/Important Questions

Alternate Automotive Fuels & Emissions (ME-503 (C)) - Important Questions

  1. Unit 414 Marks High Priority

    Explain the mechanisms of formation of hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx) in spark-ignition engines and discuss factors that influence their formation.

    Core conceptual question on emissions chemistry; highest frequency in Unit 4 per analytics.

  2. Unit 414 Marks Medium Priority

    Explain smoke formation in compression-ignition (CI) engines. Discuss the influencing factors and operating conditions that increase or decrease smoke emissions.

    Important topic addressing particulate/smoke generation in compression-ignition engines; appears repeatedly though less than the HC/CO/NOx topic.

  3. Unit 414 Marks High Priority

    Compare and contrast diesel and petrol emissions (types, relative magnitudes, health/environmental impacts) and outline major control strategies.

    Comparative analysis frequently asked to assess understanding of emission characteristics and control priorities.

  4. Unit 414 Marks High Priority

    Describe biodiesel production by esterification/transesterification, list key properties of biodiesel and discuss its effects on engine performance and emissions.

    Covers alternative fuel impacts on emissions and production pathways; commonly examined in Unit 4.

  5. Unit 414 Marks High Priority

    Explain the types of catalytic converters and measurement techniques (NDIR, FID, chemiluminescent analyzer, GC, smoke meters) used for exhaust emission analysis.

    Instrumentation and aftertreatment topic with repeated presence; tests both theory and measurement techniques.

  6. Unit 410 Marks High Priority

    Discuss storage, handling and safety aspects of gaseous fuels (CNG, LPG, hydrogen, biogas) and fuel-metering considerations for gaseous fuels.

    Practical safety and fuelling topic frequently examined along with gaseous-fuel emission/control considerations.

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