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Fuel Combustion Efficiency

CBT 19 questions

First 5 of 19 questions — with answers

The correct answer is marked. Unlock the rest to study the whole test, online or offline.

  1. Question 1

    A large increase in cylinder pressure occurs:
    • When there is a small delay between beginning of injection and actual ignition.
    • When there is a large delay between beginning of injection and actual ignition.
    • When there is no delay between beginning of injection and actual ignition.

  2. Question 2

    A too late combustion leads to:
    • Decreased exhaust gas temperature.
    • No change in exhaust gas temperature.
    • Reduced soot information and cleaner turbo chargers.
    • Increased exhaust gas temperature.

  3. Question 3

    Fuel must be atomized and distributed finely through the combustion chamber:
    • To increase the pumping volume.
    • To increase the surface area available for ignition.
    • To prevent fuel accumulation.

  4. Question 4

    How will a large content of "Cat fines" in the fuel influence the injection timing?
    • Cat fines will improve the fuel quality and lead to early injection.
    • Cat fines will have no influence on the injection and combustion.
    • Cat fines will improve the atomisation and thus the combustion.
    • Abrasive wear of pumps and valves will lead to late injection.

  5. Question 5

    The combustion process starts when:
    • The fuel pump starts working.
    • The exhaust valve is closed.
    • When there is an increase in cylinder pressure.

Preview — 5 of 19 questions

You are seeing the first 5 questions with answers. Unlock the remaining 14 to study the whole test — online or offline.

About this CBT test

Fuel Combustion Efficiency is a CBT test with 19 questions and verified answers. Common topics include: cylinder pressure, fuel, combustion, injection, normal, large, lower, maximum.

You can practise the free questions online — one at a time, with the correct answer — or unlock the whole test and download it to study offline, without internet.

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