(41) In a washing machine, which component is an essential part for agitating and cleaning the clothes during a wash cycle?
- (a) Timer knob
- (b) Drain pump
- (c) Agitator
- (d) Detergent dispenser
(42) In a computer keyboard, which component is an essential part for registering keypresses and sending input to the computer?
- (a) Keycaps
- (b) Palm rest
- (c) Switches
- (d) USB connector
(43) In a flashlight, which component is an essential part for producing light when the flashlight is turned on?
- (a) Battery compartment
- (b) On/off switch
- (c) Light bulb or LED
- (d) Reflector
(44) In a smartphone, which component is an essential part for connecting to wireless networks and providing internet access?
- (a) Speaker
- (b) Headphone jack
- (c) Wi-Fi module
- (d) GPS receiver
(45) In a bicycle, which component is an essential part for changing the speed of the bike by altering the gear ratio?
- (a) Handlebars
- (b) Saddle
- (c) Gear shifter
- (d) Chain
