Emmeline P. Serote

1. Which of these is useful in cooking food?

• A. aluminum casserole

• B. ceramic mug

• C. metal spoon

• D. plastic cup

2. Why should electrical wiring be made from copper?

• A. It conducts electricity.

• B. It is not magnetic.

• C. It is shiny.

• D. It is strong.

3. Which of these is NOT used as a conductor?

• A. lighted bulb

• B. lighted candle

• C. washing machine

• C. water heater

4. Why is aluminum used in cooking pans?

• A. It is a good conductor of electricity.

• B. It is a good conductor of heat.

• C. It has a very high density.

• D. It is strong.

5. Why is electrical wiring covered with plastic?

• A. To help electricity flow along the wire.

• B. to make it look more beautiful

• C. To make it stronger

• D. to make it safe

6. Which materials are not good conductors of electricity?

• A. brass, metal, water

• B. copper, nickel, steel

• C. gold, iron, siler

• D. plastic, rubber, wood

7. Which materials are poor conductors of electricity?

• A. chromium

• B. electrons

• C. fabrics

• D. insulators

8. Which of these is NOT an insulator?

• A. cloth

• B. silk

• C. water

• D. wood

9. Which statement below is true?

• A. All materials are good conductors of heat and electricity.

• B. Cooking pots and pans made of metals makes cooking faster.

• C. Iron, gold, silver and nickel are examples of insulators

• D. Silk, leather, oil and rubber are examples of conductors

10. What is the safest way to handle electrical wires?

• A. Always wear rubber gloves to protect you from electric current.

• B. Wash your hands before handling electrical wires.

• C. Use plastic tapes when fixing broken cable

• . Remove the rubber coating of the electrical wires