Worksheets6.1 T3 Ferrous Metal and Its Alloys Quiz
Total questions: 34
Worksheet time: 17mins
Austenitic stainless steels are.
Magnetic.
Non-magnetic.
Hardened by heat treatment.
The formation of steel depends upon.
The formation of pearlite into austenite.
The formation of austenite into pearlite.
The presence of pearlite in the structure.
The hardness of steel depends upon.
Formation of pearlite into austenite.
Formation of cementite.
The iron austenite grain structure.
Austenitic steel is produced when the material is heated to.
Above the Upper Critical Point.
Above the Lower Critical Point.
Below the Upper Critical Point.
Steel begins to appear dull red at about 1 000 °F, and as the temperature increases, the color changes gradually through various shades of.
Red to yellow, to orange and finally white
Red to white, to yellow and finally orange
Red to orange, to yellow and finally white
The ability of mild steel to accept more load after the yield point is reached is due to.
Necking.
Strain hardening.
Plasticisation.
The purpose of heat treatment is.
Change the mechanical property of steel (remark physical properties)
To change the internal structure of steel
To change the appearance of the component
What is the main purpose of annealing?
To improve machinability
To improve magnetism
To increase hardness
Case Hardening is a method of producing hard skin on the surface of.
High-carbon steel parts
Cast iron (heavy parts)
Low-carbon steel parts
The process of increasing carbon percentage on the surface of Low-carbon steel is known as.
Hardening
Nitriding
Carburizing
Mark the correct statement(MTCS).
Steel is tempered than hardened
Steel is annealed than tempered
Steel is hardened than tempered
Case hardening can be carried out on.
Titanium.
Any ferrous metal.
Duralumin.
Which statement is correct with respect to Nonferrous metals.
Can be tempered
Can be normalized
Cannot be tempered or normalized
Quenching is not necessary when hardening is done by.
case hardening
flame hardening
nitriding
Steel is tempered.
After hardening.
Before hardening.
To increase hardening.
A low carbon steel would normally be case hardened using.
The nitriding process.
Flame or induction hardening.
Pack or gas carburising.
After a product has been manufactured and all heat-treatment has been carried out the stress remaining if any is termed as.
Applied stress
Residual stress
Working stress
Material after cold working are subjected to the following process of relieve stress.
Tempering
Annealing
Normalizing
The annealing process on steel is required sometimes as it.
Provides a corrosion resistant layer that prevents oxidation.
Allows the material a greater stress per unit area.
Relieves internal stress suffered after engineering processes.
What do you understand by 'Tempering'.
Heating under the UCP and slow cooling.
Heating over the UCP and fast cooling.
Heating over the UCP and slow cooling.
The difference between annealing and normalizing is.
Both are heated above the UCT, cool slowly to anneal, cool in air to normalize.
Both are heated below the UCT, cool in air to anneal, cool slowly to normalize.
Both are heated above the UCT, cool in air to anneal, cool slowly to normalize.
Normalizing of steel is done to.
Remove residual stress of the manufacturing process.
Make steel softer.
Restore the fatigue life of steel.
When normalising, the material is.
Quenched immediately.
Left to cool in room temperature.
Cooled slowly.
Mark the incorrect statement.
There are three commonly used quenching liquids- brine, water, and oil.
Generally, an oil quench is used for carbon steels.
Generally, brine or water for carbon steels.
Which of the following are not the form of case hardening.
Tempering, annealing
Carburizing, cyaniding
Nitriding, cyaniding
Mark the correct statement.
Nitriding is just like other case hardening processes
Parts are not hardened and tempered before nitriding
Nitriding is unlike other case hardening processes
What temperature would steel be tempered at?
At the annealing temperature.
Above the annealing temperature.
Below the annealing temperature.
Tempering steel gives.
Greater brittleness.
Greater hardness.
Relief of internal stress after hardening.
The purpose of case hardening is to.
Produce a hard case over a tough core.
Reduce the carbon in the steel.
Introduce carbon into the steel.
At normal temperatures High carbon steel is harder because.
It has more austenite.
of the % of carbon in the granules.
It has less austenite.
Nitriding is.
Tempering.
Anodising.
Case hardening.
What is the effect of Annealing process on steel Materials.
Toughens the metal.
Makes the metal malleable.
Makes the metal brittle.
Tempering of hardened steel is carried out to.
Retain surface hardness, but soften the core.
Retain core hardness, but soften the surface.
Significantly reduce the brittleness without suffering a major drop in its strength.
A given component cracked after heat treatment. What can be the possible reason?
It was heated for long time
It was not properly cleaned before heating
It was suddenly cooled in brine
