Interview Questions.

Question 1. Differentiate Between Carbon Steel And Alloy Steel ?

Answer :

Carbon steel is the combination of iron and carbon. It is without difficulty rusted and malleable. It may be effortlessly machined and magnetic. Alloy metallic is the mixture of iron, carbon and different alloying factors. It is rust evidence and more difficult and tougher. It is hard for machining and non magnetic.

Question 2. Why Is The Soldering Iron Bit Made Of Copper And Not Of Steel ?

Answer :

Because copper is ideal conductor of warmth and fast transfer its heat to the metallic on the joint than the metal.

Production Planning and Control Interview Questions
Question three. Which Type Of Grains Formed After Hardening The Steel ?

Answer :

Hardened steel have incorporates great grains.

Question four. What Are The Commonly Found Iron Ores ?

Answer :

Hematite, Magnetite, Limonite, Siderite and Iron pyrite are the main iron ores.

Question five. How Will You Identify Cast Iron, Mild Steel And High Carbon Steel ?

Answer :

By spark: When a metallic is held towards grinding wheel it offers sparks. Cast iron offers thick and brief sparks. Mild metallic gives medium and dense sparks and High carbon steel gives lengthy and dense sparks. By hammering : When a blow of hammer is given with those metals there will be a deep spot on slight metal, much less deep spot on high carbon metal and forged iron can also spoil.

Production Interview Questions
Question 6. Why Is The Most Of Cutting Tools Made Out In H.S.S ?

Answer :

Because it face up to the warmth on the reducing fringe of device and it easily paintings in high pace.

Question 7. What Is Heat Treatment ?

Answer :

Heat remedy is an operation involving heating and cooling of metals to change its homes.

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Question 8. Why Is It Not Possible To Harden Unalloyed Tool Steel Part Right Through Its Full Thickness ?

Answer :

Because it requires very excessive cooling rate which is simplest feasible for its outer floor.

Question nine. Define Normalising ?

Answer :

Normalising is a procedure to make the metallic element to its everyday degree.

The foremost functions are

To lessen grain size of metal.
To attain favored mechanical homes.
To dispose of inner stresses due to operating.
Production Engineer Interview Questions
Question 10. Describe The Annealing Process?

Answer :

The process for softening the metallic component is called Annealing. Generally it's miles done for the subsequent functions,

To melt the metallic for machining.
To refine the grain length in the metal.
To increase ductility in the metal.
To relieve inner stresses.
To change electrical and mechanical homes.
Question 11. What Is Case Hardening ?

Answer :

It is a technique of creating outer surfaces more difficult of the metal part. Generally it is completed for the subsequent functions,

To make outer floor harder.
To deliver the cost cheaper
To utilize low carbon steel.
Steam Turbine Interview Questions
Question 12. What Are The Common Heat Treatment Processes Used In Industries ?

Answer :

The following warmness remedy processes are commonly utilized in production :

Hardening
Tempering
Annealing
Normalising
Case hardening
Production Planning and Control Interview Questions
Question thirteen. What Is Meant By Lower And Higher Critical Points ?

Answer :

While heating a metallic component, the temperature raises and it changes the structure of metallic part .The temperature point at which the exchange starts is called decrease important factor and the temperature at which the change ends is known as higher essential point.

Question 14. Why Heat Treatment Of Steel Is Necessary?

Answer :

To improve machinability.
To achieve desired properties.
To increase resistance of corrosion.
To alternate electrical and magnetic houses.
To relieve the stresses after bloodless or warm operating.
To refine the grain size.
Question 15. What Are The Differences Between Brass And Bronze ?

Answer :

Brass is an alloy of copper and zinc. Generally brass consists of 60% copper and 40% zinc. These are used for making bearings, pump fittings, trees and utensils.

Bronze incorporates copper and tin. It is comparatively difficult, surface put on is less, can be remolded into any shape like wires, sheets, rods and so on.

Boiler Operator Interview Questions
Question 16. What Are The Chemical Composition Of Gun Metal, German Silver And Duralumin ?

Answer :

Gun steel is an alloy of 88% copper, 10% tin and a couple of% zinc. It is generally used for casting boiler fittings, bearings ,trees and many others.

German silver is an alloy of copper, nickel, tin and led. It is used for making utensils and resistances in electrical paintings.

Duralumin is the aluminium alloy includes 3.5­4.5% copper,0.Four­zero.7% magnesium,0.Four­zero.7% manganese and remaining aluminium .Mainly used for making bars, tubes, rivets, sheets ,forgings and stampings.

Question 17. What Do You Mean By Stainless Steel ?

Answer :

It is an alloy metallic which includes specially eight% Nickel and 18% Chromium. Stainless steel foremost packages in measuring and surgical devices.

Steam Boilers Interview Questions
Question 18. How Is Steel Classified ?

Answer :

According to carbon percentage

Low carbon steel : Less than zero.25% carbon
Medium carbon steel: 0.25%­zero.7% carbon
High carbon metallic: zero.7%­1.Five% carbon
According to percentage of alloying elements

Low alloy metal: Alloying element much less than 8%
High alloy metallic: Alloying detail more than eight%
Production Interview Questions
Question 19. Why Are Machine Beds Made Of Cast Iron?

Answer :

Because it has extra compressive strength and negligible shrinkage. It can easily forged into any essential form, wear resisting and can absorb vibrations.

Question 20. How Does Carbon Affects The Properties Of Steel ?

Answer :

If carbon content material is higher the diploma of hardness is greater and the melting factor is decrease, If carbon percentage is lower it is easy to forging and forge welding.

Steel Structures Design Interview Questions
Question 21. Define Hardness Of The Metal ?

Answer :

It is the belongings of the steel which makes a metal succesful to resist surface penetration via different metals .Hard metals are High carbon steel and High speed metallic.

Question 22. What Is The Toughness Of Metal ?

Answer :

Toughness is the assets of metallic due to which with out fracture a steel is able to face up to bending or torsion. Mild steel and wrought iron are hard metals.

Question 23. Define The Following Properties Of Metal : (a) Fusibility (b) Stiffness (c) Ductility

Answer :

Fusibility: It is the belongings of metal because of which a metal will become fluid whilst it's miles heated.

Stiffness: It is the assets of metal because of which a metallic is able to resisting deflection because of an externally implemented load.

Ductility: It is the assets of metallic because of which a steel may be drawn into the shape of wires without rupture.

Metallurgy Interview Questions
Question 24. Why Are Cast Iron Seasoned Before Machining ?

Answer :

For smooth machining and saving the slicing edge of the device.

Boilermaker Interview Questions