Effects of rusting practice exercise 4

A bridge in Mombasa shows rusted spots at its joints. What effect of rusting could this cause over time?

A bridge in Mombasa shows rusted spots at its joints. What effect of rusting could this cause over time?  (1 mark)

A bridge in Mombasa shows rusted spots at its joints. What effect of rusting could this cause over time?  (1 mark)

A farmer left his iron plough in the rain for several weeks. What effect is most likely to happen?

A farmer left his iron plough in the rain for several weeks. What effect is most likely to happen?  (1 mark)

A farmer left his iron plough in the rain for several weeks. What effect is most likely to happen?  (1 mark)

A lorry carrying fresh fish daily from Mombasa to Nairobi developed rusted patches underneath. What rusting effect is most likely affecting the lorry’s operation?

A lorry carrying fresh fish daily from Mombasa to Nairobi developed rusted patches underneath. What rusting effect is most likely affecting the lorry’s operation?  (1 mark)

A lorry carrying fresh fish daily from Mombasa to Nairobi developed rusted patches underneath. What rusting effect is most likely affecting the lorry’s operation?  (1 mark)

A mechanic found that several rusted gears in a water pump were no longer turning. What rust effect has likely caused this?

A mechanic found that several rusted gears in a water pump were no longer turning. What rust effect has likely caused this?  (1 mark)

A mechanic found that several rusted gears in a water pump were no longer turning. What rust effect has likely caused this?  (1 mark)

A mechanic tried to unscrew a bolt on a motorcycle that had been unused for 6 months. It would not move. What is the most likely reason?

A mechanic tried to unscrew a bolt on a motorcycle that had been unused for 6 months. It would not move. What is the most likely reason?  (1 mark)

A mechanic tried to unscrew a bolt on a motorcycle that had been unused for 6 months. It would not move. What is the most likely reason?  (1 mark)

A railway maintenance team noticed metal bolts on a bridge structure had changed colour and some snapped during replacement. What is the most likely rust-related problem?

A railway maintenance team noticed metal bolts on a bridge structure had changed colour and some snapped during replacement. What is the most likely rust-related problem?  (1 mark)

A railway maintenance team noticed metal bolts on a bridge structure had changed colour and some snapped during replacement. What is the most likely rust-related problem?  (1 mark)

During a class experiment, one student noticed that a rusted gate hinge made a loud squeaky sound when moved. What effect of rusting does this show?

During a class experiment, one student noticed that a rusted gate hinge made a loud squeaky sound when moved. What effect of rusting does this show?  (1 mark)

During a class experiment, one student noticed that a rusted gate hinge made a loud squeaky sound when moved. What effect of rusting does this show?  (1 mark)

Study the diagram showing two water tanks exposed to different environments. Which tank is likely affected by rust and why? TankLocationObservations AArid regionShiny, no surface damage BNear coastlineBrown patches, leaks observed

Study the table below showing two water tanks exposed to different environments. Which tank is likely affected by rust and why?  (1 mark) Tank Location Observations A Arid region Shiny, no surface damage B Near coastline Brown patches, leaks observed

Study the table below showing two water tanks exposed to different environments. Which tank is likely affected by rust and why?  (1 mark) Tank Location Observations A Arid region Shiny, no surface damage B Near coastline Brown patches, leaks observed

The table below compares maintenance costs and safety ratings of two buildings. What conclusion can be drawn about rust’s impact? BuildingRust PresenceAnnual Maintenance Cost (KES)Safety Rating (/10) XYes1,200,0005 YNo400,0009

The table below compares maintenance costs and safety ratings of two buildings. What conclusion can be drawn about rust’s impact?  (1 mark) Building Rust Presence Annual Maintenance Cost (KES) Safety Rating (/10) X Yes 1,200,000 5 Y No 400,000 9

The table below compares maintenance costs and safety ratings of two buildings. What conclusion can be drawn about rust’s impact?  (1 mark) Building Rust Presence Annual Maintenance Cost (KES) Safety Rating (/10) X Yes 1,200,000 5 Y No 400,000 9

The table below shows observations of two iron bars left outside for 3 months. Which bar shows clear signs of rusting effects? Iron BarAppearanceStrength Test Result Bar AShiny, no colour changeStrong – supports 50 kg Bar BBrown patches, flaky surfaceWeak – cracks at 20 kg

The table below shows observations of two iron bars left outside for 3 months. Which bar shows clear signs of rusting effects?   (1 mark) Iron Bar Appearance Strength Test Result Bar A Shiny, no colour change Strong – supports 50 kg Bar B Brown patches, flaky surface Weak – cracks at 20 kg

The table below shows observations of two iron bars left outside for 3 months. Which bar shows clear signs of rusting effects?   (1 mark) Iron Bar Appearance Strength Test Result Bar A Shiny, no colour change Strong – supports 50 kg Bar B Brown patches, flaky surface Weak – cracks at 20 kg