30 Questions
What property indicates a metal's hardness?
Temper
Which type of steel does not accept heat treatment?
Low-carbon steel
What is the main application of high-carbon steels?
Springs and cutting tools
How does silicon affect the properties of steel when alloyed?
Acts as a hardener
What is a unique characteristic of Mangalloy (manganese steel)?
Extreme anti-wear properties
Which type of steel is especially adaptable for machining or forging?
Medium-carbon steel
What does compressive strength measure in a metal?
Ability to withstand being pressed or squeezed
Which type of strength relates to a metal's ability to resist shock?
Impact strength
What does torsional strength measure in a metal?
Ability to resist rotational shear
Which property of metals is related to their ability to resist cutting, penetration, or abrasion?
Hardness
What does fatigue strength measure in metals?
Ability to resist repeated loading
Which type of loading force assesses a metal's bending strength?
Bending strength
What is the purpose of adding manganese to steel in the refining process?
To counteract the effects of sulphur and prevent brittleness
How does phosphorus affect low-carbon steel?
It raises the yield strength and enhances resistance to corrosion
What is the role of nickel in steel when heat-treated?
Adds strength, hardness, and increases depth of hardening
How does the presence of sulphur affect steel during rolling or forging?
Causes brittleness and requires the addition of manganese
What is the impact of alloying additions of sulphur in small amounts to steel?
Increases yield strength and hardness
How does manganese improve a metal's forging characteristics?
By reducing brittleness and counteracting sulphur effects
What is the purpose of normalising in aircraft work?
To relieve internal stresses in welded parts
What is the difference between the particles formed in normalising and those in annealing?
Those formed in annealing are larger
How can steel be hardened most effectively?
By quenching it rapidly in water, oil, or brine
What could lead to failure in steel after processes like forging, welding, and machining?
Leaving stresses within the material
In what way does cooling steel in still air after heating help in normalising?
It relieves internal stresses present in the material
Why is it important for the alloy to be cooled rapidly after carbon disperses uniformly?
To achieve maximum hardness
What is the main reason for alloying steel with tungsten?
To elevate the melting point
Which type of steel is suitable for high-temperature applications like firewalls?
Stainless steel
What characteristic of titanium steel makes it preferred for use in extreme temperature conditions?
Lightweight
Why is pure iron not suitable for use as a structural material?
Weakness and softness
Which component in a magneto is likely to be made of tungsten steel?
Breaker contacts
What property of stainless steel makes it well-suited for exhaust system components?
Strength and resistance to corrosion
Test your knowledge on stress, strain, yield strength, ultimate strength, and other mechanical properties of materials. Explore concepts like strain hardening, necking, and fracturing based on stress vs strain curves. This quiz is designed for students studying materials science or engineering.
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