Uses of alloys practice exercise 3

A mechanic in Kisumu is repairing a car. Why is steel used for the car body instead of pure iron?  91 mark)

A mechanic in Kisumu is repairing a car. Why is steel used for the car body instead of pure iron?  91 mark)

A mechanic in Kisumu is repairing a car. Why is steel used for the car body instead of pure iron?  (1 mark)

Electricians installing sockets in a new Nairobi apartment used brass, as shown below. Why is brass chosen for sockets instead of pure copper?  (1 mark)

Electricians installing sockets in a new Nairobi apartment used brass, as shown below. Why is brass chosen for sockets instead of pure copper?  (1 mark)

Electricians installing sockets in a new Nairobi apartment used brass, as shown below. Why is brass chosen for sockets instead of pure copper?  (1 mark)

James received change at a shop in Eldoret in the form of coins, as shown below. Why are coins made of bronze instead of pure copper?  (1 mark)

James received change at a shop in Eldoret in the form of coins, as shown below. Why are coins made of bronze instead of pure copper?  (1 mark)

James received change at a shop in Eldoret in the form of coins, as shown below. Why are coins made of bronze instead of pure copper?  (1 mark)

Mary bought new cooking spoons for her home in Nakuru. Why are these spoons made from stainless steel instead of pure iron?  (1 mark)

Mary bought new cooking spoons for her home in Nakuru. Why are these spoons made from stainless steel instead of pure iron?  (1 mark)

Mary bought new cooking spoons for her home in Nakuru. Why are these spoons made from stainless steel instead of pure iron?  (1 mark)

Hospitals in Nairobi require surgical equipment such as scalpels, scissors, and surgical trays. Why is stainless steel preferred over ordinary steel for these tools, and what could happen if ordinary steel were used?  (2 marks)

Hospitals in Nairobi require surgical equipment such as scalpels, scissors, and surgical trays. Why is stainless steel preferred over ordinary steel for these tools, and what could happen if ordinary steel were used?  (2 marks)

Hospitals in Nairobi require surgical equipment such as scalpels, scissors, and surgical trays. Why is stainless steel preferred over ordinary steel for these tools, and what could happen if ordinary steel were used?  (2 marks)

At a school band performance in Nairobi, a trumpet is played. Why is brass used to make this instrument instead of pure copper?  (1 mark)

At a school band performance in Nairobi, a trumpet is played. Why is brass used to make this instrument instead of pure copper?  (1 mark)

At a school band performance in Nairobi, a trumpet is played. Why is brass used to make this instrument instead of pure copper?  (1 mark)

Kenya is expanding its port facilities in Mombasa and plans to build new ships, as shown below. Explain why steel alloys are used in shipbuilding instead of pure iron, considering exposure to salty seawater, durability, and cost of maintenance.  (2 marks)

Kenya is expanding its port facilities in Mombasa and plans to build new ships, as shown below. Explain why steel alloys are used in shipbuilding instead of pure iron, considering exposure to salty seawater, durability, and cost of maintenance.  (2 marks)

Kenya is expanding its port facilities in Mombasa and plans to build new ships, as shown below. Explain why steel alloys are used in shipbuilding instead of pure iron, considering exposure to salty seawater, durability, and cost of maintenance.  (2 marks)

Kenya Railways is laying down new tracks for the Standard Gauge Railway. Why are steel alloys used for railway tracks instead of pure iron, and what challenges arise from temperature changes?  (2 marks)

Kenya Railways is laying down new tracks for the Standard Gauge Railway. Why are steel alloys used for railway tracks instead of pure iron, and what challenges arise from temperature changes?  (2 marks)

Kenya Railways is laying down new tracks for the Standard Gauge Railway. Why are steel alloys used for railway tracks instead of pure iron, and what challenges arise from temperature changes?  (2 marks)

Contractors building the Nairobi Expressway use heavy machines such as bulldozers and rollers. Why are strong steel alloys chosen for making the moving parts of these machines instead of softer metals? (2 marks)

Contractors building the Nairobi Expressway use heavy machines such as bulldozers and rollers. Why are strong steel alloys chosen for making the moving parts of these machines instead of softer metals? (2 marks)

Contractors building the Nairobi Expressway use heavy machines such as bulldozers and rollers. Why are strong steel alloys chosen for making the moving parts of these machines instead of softer metals? (2 marks)

Modern Kenyan banks install strong safes and security doors. Explain why alloyed steel is used instead of pure iron for making these safes, and how this ensures security.  (2 marks)

Modern Kenyan banks install strong safes and security doors. Explain why alloyed steel is used instead of pure iron for making these safes, and how this ensures security.  (2 marks)

Modern Kenyan banks install strong safes and security doors. Explain why alloyed steel is used instead of pure iron for making these safes, and how this ensures security.  (2 marks)

Modern Kenyan banks install strong safes and security doors. Explain why alloyed steel is used instead of pure iron for making these safes, and how this ensures security.  (2 marks)