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Technology 1-2 ESO – Unit 13 THERMAL MACHINES extra activities

1 –  Watch the video on “How Do Steam Locomotives Work – Steam Engines Explained” and answer:

    • a) What are the two things that a steam locomotive needs?
    • b) What two people  run the steam locomotive?
    • c) What is around the “firetubes”? Why?
    • d) What is the function of the safety valve?
    • e) Where are the pistons?
    • f) Why the pistons move?
    • g) Why the wheels move?
    • h) What is the function of the “slide valve”?
    • i) What happens to the used steam?

2 –  Watch the video on “How Jet Engines Work” and answer:

  • a) How do birds fly?
  • b) What is the “thrust”?
  • c) What happens to the air in the compressor?
  • d) What happens to the mix of air and fuel in the combustor?
  • e) Why does the shaft connected to the fan spin?
  • f) Why we put a gear in the engine?

3 –  Watch the video on “4 Stroke Engine Working Animation” and answer:

  • a) What are the basic components of a 4 stroke gas engine?
  • b) Why a four stroke engine is called “four stroke”?
  • c) What happens in the “intake stroke”?
  • d) What happens in the “combustion stroke”?
  • e) What are the RPM?