Importance of common alloys practice exercise 3

The school caretaker complains that the desks made from plain iron keep rusting during rainy seasons. What material should the school use instead, and why?  (1 mark)

The school caretaker complains that the desks made from plain iron keep rusting during rainy seasons. What material should the school use instead, and why?  (1 mark)

Refer to the table in the image below. A supermarket is ordering kitchen tools like knives and forks. Which alloy should they order and why?   (1 mark) Alloy Composition Uses Stainless steel Chromium, Nickel  Kitchen utensils, medical instruments and appliances

Refer to the table in the image below. A supermarket is ordering kitchen tools like knives and forks. Which alloy should they order and why?   (1 mark) Alloy Composition Uses Stainless steel Chromium, Nickel  Kitchen utensils, medical instruments and appliances

Ali noticed some old coins changed colour and became dull, while others stayed shiny. What could explain this difference?   (1 mark)

Ali noticed some old coins changed colour and became dull, while others stayed shiny. What could explain this difference?   (1 mark)

Ali noticed some old coins changed colour and became dull, while others stayed shiny. What could explain this difference?   (1 mark)

A science teacher is planning to build a small model bridge for a school competition. The bridge needs to be strong and rust-resistant as it will be placed outdoors. The school only has access to steel and brass. Which alloy should the teacher choose and why?  (1 mark)

A science teacher is planning to build a small model bridge for a school competition. The bridge needs to be strong and rust-resistant as it will be placed outdoors. The school only has access to steel and brass. Which alloy should the teacher choose and why?  (1 mark)

The Central Bank of Kenya is designing a new set of coins. They want them to last long and maintain their shiny appearance even after many years of use. Should they use brass, bronze, or pure copper? Justify your answer.  (1 mark)

The Central Bank of Kenya is designing a new set of coins. They want them to last long and maintain their shiny appearance even after many years of use. Should they use brass, bronze, or pure copper? Justify your answer.  (1 mark)

Mary’s aluminium sufuria keeps leaking after a short time of use. What advice would you give her when buying her next sufuria, and why?  (1 mark)

Mary’s aluminium sufuria keeps leaking after a short time of use. What advice would you give her when buying her next sufuria, and why?  (1 mark)

A student is building a high-performance sports bicycle. The frame must be light but strong. Using the image of the bicycle below, suggest a suitable alloy and explain your choice.  (1 mark)

A student is building a high-performance sports bicycle. The frame must be light but strong. Using the image of the bicycle below, suggest a suitable alloy and explain your choice.  (1 mark)

A student is building a high-performance sports bicycle. The frame must be light but strong. Using the image of the bicycle below, suggest a suitable alloy and explain your choice.  (1 mark)

A student is building a high-performance sports bicycle. The frame must be light but strong. Using the image of the bicycle below, suggest a suitable alloy and explain your choice.  (1 mark)

A student is building a high-performance sports bicycle. The frame must be light but strong. Using the image of the bicycle below, suggest a suitable alloy and explain your choice.  (1 mark)

A hospital in Nairobi is seeking bids for medical implants like hip and knee replacements. Two suppliers propose items made from aluminium alloys and titanium alloys. Which should the hospital choose and why?  (1 mark)

A hospital in Nairobi is seeking bids for medical implants like hip and knee replacements. Two suppliers propose items made from aluminium alloys and titanium alloys. Which should the hospital choose and why?  (1 mark)

A hospital in Nairobi is seeking bids for medical implants like hip and knee replacements. Two suppliers propose items made from aluminium alloys and titanium alloys. Which should the hospital choose and why?  (1 mark)

The school’s iron water tank started leaking due to rust. What alloy would you recommend they use for the new tank, and why? (1 mark)

The school’s iron water tank started leaking due to rust. What alloy would you recommend they use for the new tank, and why? (1 mark)

The school’s iron water tank started leaking due to rust. What alloy would you recommend they use for the new tank, and why? (1 mark)

You see a rusty iron water tank in your school compound, as shown below. Suggest a better material the school should use to replace it, and explain why.  (1 mark)

You see a rusty iron water tank in your school compound, as shown below. Suggest a better material the school should use to replace it, and explain why.  (1 mark)

You see a rusty iron water tank in your school compound, as shown below. Suggest a better material the school should use to replace it, and explain why.  (1 mark)