How a Can Opener Works / āϕ⧇āύ āĻ“āĻĒ⧇āύāĻžā§° āϕ⧇āύ⧇āĻ•ā§ˆ āĻ•āĻžāĻŽ āϕ⧰⧇


Working Steps / āϧāĻžāĻĒ⧇ āϧāĻžāĻĒ⧇ āĻ•āĻžāĻŽ āϕ⧰āĻžā§° āĻĒā§ā§°āĻ•ā§ā§°āĻŋāϝāĻŧāĻž


1. Can opener placed on rim : Place the can opener on the rim of the can. : āϕ⧇āύ⧰ āĻ•āĻŋāύāĻžā§°āϤ āĻ“āĻĒ⧇āύāĻžā§°āĻŸā§‹ ā§°āĻžāĻ–āĻž āĻšāϝāĻŧāĨ¤


2. Handles squeezed to grip : Squeeze the handles to grip the lid tightly. : āĻšā§‡āĻŖā§āĻĄā§‡āϞ āϟāĻŋāĻĒāĻŋ āĻĸāĻžāĻ•āύāĻŋāĻŸā§‹ āĻŽāϜāĻŦ⧁āϤāĻ•ā§ˆ āϧ⧰āĻž āĻšāϝāĻŧāĨ¤



3. User turns the crank : Turn the crank (handle). : āχāωāϜāĻžā§°ā§‡ āĻ•ā§ā§°ā§‡āĻ‚āĻ•āĻŸā§‹ āĻ˜ā§‚ā§°āĻžāϝāĻŧāĨ¤


4. Gear wheel moves along the rim : The gear wheel moves around the can edge. : āĻ—āĻŋāϝāĻŧāĻžā§° āϚāĻžāĻ•āĻŸā§‹ āϕ⧇āύ⧰ āĻ•āĻŋāύāĻžā§°ā§° āĻ•āĻžāώ⧇⧰⧇ āĻ˜ā§‚ā§°ā§‡āĨ¤


5. Cutting wheel slices the lid : Sharp cutting wheel cuts the metal lid. : āϧāĻžā§°āĻžāϞ⧋ āĻ•āĻžāϟāĻŋāĻ‚ āϚāĻžāĻ•āĻŸā§‹ā§ąā§‡ āϧāĻžāϤ⧁⧰ āĻĸāĻžāĻ•āύāĻŋ āĻ•āĻžāϟāĻŋ āϝāĻžāϝāĻŧāĨ¤


6. Lid separates from the can : The lid comes off easily. : āĻĸāĻžāĻ•āύāĻŋāĻŸā§‹ āϏāĻšāĻœā§‡ āφāρāϤ⧰āĻžāχ āϝāĻžāϝāĻŧāĨ¤


Key Concept / āĻŽā§āĻ–ā§āϝ āϧāĻžā§°āĻŖāĻž



  • Uses gear motion + cutting wheel : āĻ—āĻŋāϝāĻŧāĻžā§° āĻ—āϤāĻŋ + āĻ•āĻžāϟāĻŋāĻ‚ āϚāĻžāĻ• āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āϕ⧰⧇

  • Gear helps movement, cutting wheel cuts metal : āĻ—āĻŋāϝāĻŧāĻžā§°ā§‡ āĻ—āϤāĻŋ āĻĻāĻŋāϝāĻŧ⧇, āĻ•āĻžāϟāĻŋāĻ‚ āϚāĻžāĻ•āĻŸā§‹ā§ąā§‡ āĻ•āĻžāϟāĻŋ āĻĻāĻŋāϝāĻŧ⧇


Simple Summary / āϏāĻšāϜ āϏāĻžā§°āĻžāĻ‚āĻļ



  • Grip → Turn → Gear moves → Lid cuts → Open

  • āϧ⧰āĻž → āĻ˜ā§‚ā§°ā§‹ā§ąāĻž → āĻ—āĻŋāϝāĻŧāĻžā§° āĻ˜ā§‚ā§°ā§‡ → āĻ•āĻžāĻŸā§‡ → āϖ⧁āϞāĻŋ āϝāĻžāϝāĻŧ


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Can Opener – 10 MCQs


Q1. A can opener is used to: : āϕ⧇āύ āĻ“āĻĒ⧇āύāĻžā§° āĻ•āĻŋāĻšā§° āĻŦāĻžāĻŦ⧇ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ ?
(a) Cut wood (b) Open cans (c) Break glass (d) Heat food

Ans: (b) Open cans
Explanation: A can opener is used to open metal cans. : āχ āϧāĻžāϤ⧁⧰ āϕ⧇āύ āĻ–ā§‹āϞāĻžā§° āĻŦāĻžāĻŦ⧇ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧāĨ¤


Q2. The can opener is placed on the: : āϕ⧇āύ āĻ“āĻĒ⧇āύāĻžā§° āĻ•’āϤ ā§°āĻ–āĻž āĻšāϝāĻŧ?
(a) Bottom (b) Side (c) Rim (d) Inside

Ans: (c) Rim
Explanation: It is placed on the rim of the can. : āϕ⧇āύ⧰ āĻ•āĻŋāύāĻžā§°āϤ ā§°āĻžāĻ–āĻž āĻšāϝāĻŧāĨ¤


Q3. Handles are squeezed to: āĻšā§‡āĻŖā§āĻĄā§‡āϞ āϟāĻŋāĻĒāĻž āĻšāϝāĻŧ āĻ•āĻŋāϝāĻŧ?
(a) Heat can (b) Grip lid (c) Break can (d) Clean lid

Ans: (b) Grip lid
Explanation: It helps to hold the lid tightly. : āĻĸāĻžāĻ•āύāĻŋ āĻŽāϜāĻŦ⧁āϤāĻ•ā§ˆ āϧ⧰⧇āĨ¤


Q4. The crank is used to: āĻ•ā§ā§°ā§‡āĻ‚āĻ• āĻ•āĻŋāĻšā§° āĻŦāĻžāĻŦ⧇ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ ?
(a) Cut directly (b) Turn mechanism (c) Hold can (d) Stop motion

Ans: (b) Turn mechanism
Explanation: Turning crank moves gears and cutter. : āĻ•ā§ā§°ā§‡āĻ‚āĻ• āĻ˜ā§‚ā§°āĻžāϞ⧇ āĻ—āĻŋāϝāĻŧāĻžā§° āφ⧰⧁ āĻ•āĻžāϟāĻžā§° āϚāϞ⧇āĨ¤


Q5. The gear wheel helps to: āĻ—āĻŋāϝāĻŧāĻžā§° āϚāĻžāĻ•āĻŸā§‹ā§ąā§‡ āĻ•āĻŋ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇ ?
(a) Heat lid (b) Move along rim (c) Stop cutting (d) Store energy

Ans: (b) Move along rim
Explanation: It moves around the can edge. : āϕ⧇āύ⧰ āĻ•āĻŋāύāĻžā§°ā§° āĻ•āĻžāώ⧇⧰⧇ āĻ˜ā§‚ā§°ā§‡āĨ¤


Q6. The cutting wheel is: āĻ•āĻžāϟāĻŋāĻ‚ āϚāĻžāĻ•āĻŸā§‹ āϕ⧇āύ⧇āĻ•ā§ā§ąāĻž ?
(a) Soft (b) Sharp (c) Round only (d) Plastic

Ans: (b) Sharp
Explanation: It must be sharp to cut metal. : āϧāĻžāϤ⧁ āĻ•āĻžāϟāĻŋāĻŦāϞ⧈ āϧāĻžā§°āĻžāϞ⧋ āϞāĻžāϗ⧇āĨ¤


Q7. The cutting wheel cuts: āĻ•āĻžāϟāĻŋāĻ‚ āϚāĻžāĻ•āĻŸā§‹ā§ąā§‡ āĻ•āĻŋ āĻ•āĻžāϟāĻŋ āϝāĻžāϝāĻŧ?
(a) Can body (b) Lid (c) Handle (d) Gear

Ans: (b) Lid
Explanation: It slices the lid of the can. : āĻĸāĻžāĻ•āύāĻŋ āĻ•āĻžāϟāĻŋ āϝāĻžāϝāĻŧāĨ¤


Q8. After cutting, the lid: āĻ•āĻžāϟāĻžā§° āĻĒāĻŋāĻ›āϤ āĻĸāĻžāĻ•āύāĻŋ āĻ•āĻŋ āĻšāϝāĻŧ?
(a) Sticks (b) Breaks (c) Separates (d) Melts

Ans: (c) Separates
Explanation: Lid separates from the can. : āĻĸāĻžāĻ•āύāĻŋ āφāρāϤ⧰āĻžāχ āϝāĻžāϝāĻŧāĨ¤


Q9. A can opener works using: āϕ⧇āύ āĻ“āĻĒ⧇āύāĻžā§° āĻ•āĻŋāĻšā§‡ā§°ā§‡ āĻ•āĻžāĻŽ āϕ⧰⧇?
(a) Heat (b) Gear motion (c) Magnet (d) Light

Ans: (b) Gear motion
Explanation: It uses gears and cutting wheel. : āĻ—āĻŋāϝāĻŧāĻžā§° āφ⧰⧁ āĻ•āĻžāϟāĻŋāĻ‚ āĻŦā§āĻ¯ā§ąāĻ¸ā§āĻĨāĻž āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āϕ⧰⧇āĨ¤


Q10. Main purpose of a can opener is: āϕ⧇āύ āĻ“āĻĒ⧇āύāĻžā§°ā§° āĻŽā§āĻ–ā§āϝ āωāĻĻā§āĻĻ⧇āĻļā§āϝ āĻ•āĻŋ?
(a) Decorate can (b) Open can safely (c) Heat can (d) Clean can

Ans: (b) Open can safely


Explanation: It helps open cans easily and safely. : āϏāĻšāĻœā§‡ āφ⧰⧁ āύāĻŋā§°āĻžāĻĒāĻĻ⧇ āϕ⧇āύ āĻ–ā§‹āϞ⧇āĨ¤