(31) In a musical instrument like a flute, which component is an essential part for producing musical tones when the player blows air into it?
- (a) Finger holes
- (b) Mouthpiece
- (c) Bell
- (d) Reed
(32) In a computer, which component is an essential part for providing the user with visual output and displaying text and graphics?
- (a) Motherboard
- (b) Power supply
- (c) Monitor
- (d) Sound card
(33) In a bicycle, which component is an essential part for transmitting power from the pedals to the rear wheel through a chain?
- (a) Brake pads
- (b) Saddle
- (c) Chain
- (d) Handlebars
(34) In a microwave oven, which component is an essential part for rotating the food to ensure even cooking?
- (a) Control panel
- (b) Magnetron
- (c) Turntable
- (d) Interior light
(35) In a digital camera, which component is an essential part for adjusting the amount of light that enters the camera’s image sensor?
- (a) Camera strap
- (b) Viewfinder
- (c) Aperture
- (d) Lens cap
