1. How do vacuum cleaners create suction?
A) They heat the air, causing it to rise.
B) They release air, pushing dirt away.
C) They decrease air pressure inside, drawing air (and dirt) in.
D) They use static electricity to attract dirt.
2. What factors affect the efficiency of a vacuum cleaner?
A) The color and design of the vacuum.
B) The size of the vacuum bag or dustbin.
C) The strength of the motor and the design of the suction head.
D) The length of the power cord
3. What does the brush roll in a vacuum cleaner do?
A) It paints the floor.
B) It beats the carpet to shake out the dirt.
C) It spreads the dirt around.
D) It brushes your hair.
4. How often should you change or clean the filters in your vacuum cleaner?
A) Once every ten years.
B) After every use.
C) Only when it stops working.
D) Every few months, according to the manufacturer's instructions.
5. What is the main reason a vacuum cleaner might lose suction over time?
A) The motor gets tired.
B) Dust and debris block the air path.
C) It runs out of batteries.
D) It needs a break.
1. Correct Answer: C) They decrease air pressure inside, drawing air (and dirt) in
Explanation: When the start switch is actuated, 120 volts of alternating current is sent to the motor, which drives the suction fan. The area of low pressure behind the fan creates the suction needed to draw air through the intake port.
2. Correct Answer: C) The strength of the motor and the design of the suction head.
Explanation: The size of the intake port affects the speed at which air travels through it. Vacuum cleaner attachments with small intake ports do a better job of picking up heavy debris than ones with large intake ports.
3. Correct Answer: B) It beats the carpet to shake out the dirt.
Explanation: The brush roll spins really fast and acts like tiny little beaters that tap the carpet. This tapping shakes the dirt loose from the carpet fibers, making it easier for the vacuum to suck it all up. It's like when you shake out a dusty rug outside.
4. Correct Answer: D) Every few months, according to the manufacturer's instructions.
Explanation: Filters catch a lot of dust and particles that you can't even see. Over time, they can get clogged up. Just like we need to breathe freely, vacuums need clean filters to work best. So, following what the people who made the vacuum suggest, usually every few months, keeps the vacuum happy.
Explanation: Inside the vacuum, there's a path that the air takes, like a little road. If this road gets blocked with too much dust, dirt, or even something like a sock, the air can't travel through it well, and the vacuum won't suck up dirt as it should. It's like when you try to drink a milkshake through a straw, and a piece of fruit gets stuck – it's hard to get the shake to move up the straw!