Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

1		2							3								4
5			6											7
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	11		12
13													14
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	17
18										19
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23
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 Check 

Across: 2. Used in car steering systems 5. A system that works using electricity 8. A working part that controls the flow of fluids in pipes or tubes. 9. The path through which electric current can flow 10. Rests on and is operated by a cam 13. A toothed wheel that meshes with another to transmit movement 14. Wher information or signals enter a system. 16. Done using machinery 18. Detects a change in energy. 20. A source of electrical energy. 21. An offcentre wheel - turns rotary motion into reciprocating machine 22. A device which is used to control temperature. 23. A beam or stick that is used to gain a mechanical advantage when used with a fulcrum. 24. A system that uses liquids to transmit power.

Down: 1. Information sent from the output back to the input. 3. A wheel with a groove in the rim - a belt,rope or chain links the wheels together; used to transmit power and lift weights. 4. The effect produced by the system. 6. A mechanism that can change the distance through which rotary motion travels. 7. A system that works using electronics. 11. A band running around two or more pulleys 12. Control - the part of a system where decisions are made. 15. Air control 17. A working part which has a particular function. 19. An electrical device used to turn electricity on and off.