Numero Uno Clothing Interview Questions and Answers

Alloying elements are used in steel making to improve properties like strength, hardness, corrosion resistance, and machinability.

• Alloying elements are added to steel to enhance specific properties such as strength, hardness, toughness, and corrosion resistance.

• Common alloying elements include chromium, nickel, manganese, molybdenum, and vanadium.

• Chromium is added to improve corrosion resistance, nickel for toughness, manganese for hardenability, molybdenum for strength, and ...read more

Ceramic is a non-metallic material made from clay, while steel is a metallic material primarily made from iron and carbon.

• Ceramic is non-metallic, while steel is metallic

• Ceramic is made from clay, while steel is primarily made from iron and carbon

• Ceramic is typically more brittle than steel

• Steel is stronger and more durable than ceramic

• Ceramic is often used for decorative purposes or in high-temperature applications, while steel is commonly used in construction and manufactur...read more

Fatigue is the weakening of a material due to repeated loading, while creep is the gradual deformation of a material under constant stress.

• Fatigue is the process of progressive and localized structural damage that occurs when a material is subjected to cyclic loading.

• Creep is the time-dependent deformation of a material under constant load or stress.

• Fatigue failure is often characterized by crack initiation and propagation, leading to eventual fracture.

• Creep is commonly obser...read more

Different types of steel making include basic oxygen furnace, electric arc furnace, and open hearth furnace.

• Basic Oxygen Furnace (BOF) - uses oxygen to reduce the carbon content in the steel

• Electric Arc Furnace (EAF) - uses electricity to melt scrap steel and produce new steel

• Open Hearth Furnace - uses a fuel-air mixture to heat the steel and remove impurities

• Other methods include Bessemer process, direct reduced iron, and secondary steelmaking processes

TTT diagram is a Time-Temperature-Transformation diagram used in materials science to understand the transformation of phases in a material.

• TTT diagram shows the relationship between temperature, time, and phases in a material during cooling or heating.

• It helps in predicting the microstructure and properties of a material based on its cooling rate.

• TTT diagrams are commonly used in heat treatment processes for metals like steel to control the final properties of the material.

• T...read more

Pig iron is an intermediate product of the iron industry, made by smelting iron ore in a blast furnace.

• Pig iron is typically around 92-94% iron, with varying amounts of carbon, silicon, manganese, sulfur, and phosphorus.

• It is brittle and not suitable for use in its raw form, but can be further processed into wrought iron or steel.

• The carbon content of pig iron gives it a high carbon equivalent, making it ideal for casting purposes.

• Common grades of pig iron include grey pig ir...read more

SN curve is a graphical representation of the relationship between stress and fatigue life of a material.

• SN curve shows the number of cycles to failure (N) against the applied stress (S).

• It helps in determining the fatigue life of a material under different stress levels.

• Materials with higher fatigue strength have a steeper slope on the SN curve.

• SN curves are commonly used in engineering to predict the durability of materials in various applications.