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SQA National 5 Engineering Science Area 2 Electronics and control overview quiz quiz

16questions. Pick an answer and you'll see why right away.

  1. In the universal systems model, what is the correct order of the three sub-systems?

  2. Which is an example of a process sub-system?

  3. A resistor has 8.0 V across it and 0.020 A through it. What is its resistance?

  4. Which power relationship should you use when you know the current and resistance only?

  5. Two 12 ohm resistors are connected in parallel. What is the total resistance?

  6. A voltage divider has R1 = 2.0 kohm (upper) and R2 = 1.0 kohm across 9.0 V. What is the output voltage across R2?

  7. What happens to the resistance of an LDR as it gets darker?

  8. Why is a series resistor always used with an LED?

  9. A transistor used as a switch turns on when its base voltage rises above approximately:

  10. Why is a protective diode connected across a motor switched by a transistor?

  11. An inverting amplifier has a feedback resistor of 60 kohm and an input resistor of 15 kohm. What is its gain?

  12. What does an operational amplifier do when used as a comparator?

  13. For a two-input AND gate, the output is logic 1:

  14. A single gate equivalent to an AND gate followed by a NOT gate is a:

  15. In Boolean notation, the plus sign (+) represents which logic function?

  16. Which flowchart symbol is used for a yes/no decision in a control program?