Gr.10 Q3 M3 PRE TEST 4/5/21

1. A type of signal alarm that produces an audible alarm tone when electrical energy is applied.

• A. bell

• B. buzzer

• C. chime

• D. transformer

2. An alarming device that produces a buzzing sound which is caused by the rapid vibration of armature.

• A. bell

• B. buzzer

• C. chime

• D. relay

3. The part of the bell that serves as the contact switch to the spring.

• A. adjustable contacts

• B. gong

• C. contacts

• D. spring

4. A path of electric current from the source to the component and goes back to the source.

• A. conductor

• B. control

• C. circuit

• D. switch

5. A momentary contact switch.

• A. push button

• B. SPST

• C. switch

• D. S3w

6. It attracts and repel thin metal sheet which move rapidly backed and forth

• A. adjustable

• B. contacts

• C. electromagnet

• D. metal strip

7. The following are parts of electric bell EXCEPT?

• A. adjustable contacts

• B. gong

• C. hammer

• D. metal strip

8. Which part of the bell that is a concave disc that produces loud sound when stuck by the hammer.

• A. bell

• B. electromagnet

• C. gong

• D. striker

9.. Which part of the buzzer that made of a thin sheet of electromagnetic materials which vibrates when electromagnet is energized and produces a buzzing sound.

• A. buzzer

• B. electromagnet

• C. hammer

• D. metal strip

10. This is small ball attached to the armature which strikes the gong that produces audible sounds when electric current runs through the electromagnet.

• A. electromagnet

• B. gong

• C. hammer

• D. spring