Engines quiz

More questions about Engines

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Which engine burns its fuel outside its cylinders?

   Answer: Steam engine

   Why: Sugar cane railways even fired their steam locomotives with bagasse, the fibrous leftovers of crushed cane.

2. 2 Medium

   Why does a steam locomotive blast its used steam up the chimney?

   Answer: To fan the fire

   Why: Working harder means a stronger blast, so the fire burns hotter just when the engine needs more steam.

3. 3 Hard

   What kind of engine drives the biggest container ships?

   Answer: Two-stroke diesel

   Why: Turning only about 70 to 100 times a minute, these giants are slow enough to drive the propeller with no gearbox in between.

4. 4 Easy

   What are the white clouds from a steam train mostly made of?

   Answer: Water droplets

   Why: True steam is invisible; the white plume appears when it cools in the air and condenses, which is why it looks biggest on cold days.

5. 5 Medium

   Which gas makes up most of a car's exhaust?

   Answer: Nitrogen

   Why: Nitrogen passes through the engine largely unchanged from the air it breathes, making up roughly 70% of a petrol car's exhaust.

6. 6 Hard

   Why did the piston go down in Newcomen's steam engine?

   Answer: Air pressure

   Why: Because the atmosphere did the pushing, the boiler only had to make steam at extremely low pressure, hence the name atmospheric engine.