Domestic electricity and safety Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which wire in a three-pin plug is green and yellow?
- A. Live
- B. Neutral
- C. Earth
- D. Fuse
2. What is the frequency of the mains supply in the UAE?
- A. 50 Hz
- B. 230 Hz
- C. 1.5 Hz
- D. 100 V
3. A heater draws 7 A in normal use. Which fuse should be fitted?
- A. 1 A
- B. 3 A
- C. 5 A
- D. 13 A
4. Why does a plastic-cased drill not need an earth wire?
- A. Plastic carries current well
- B. It is double insulated, so the casing cannot become live
- C. It has a larger fuse
- D. It uses d.c.
5. Which is an advantage of a circuit breaker over a fuse?
- A. It is cheaper to replace every time
- B. It cannot detect large currents
- C. It can be reset after it trips
- D. It must be fitted in the neutral wire