Rashmi Metaliks Trainee Interview Questions and Answers

Q1. What are the mode of heat transfer ?
Ans. 
Modes of heat transfer include conduction, convection, and radiation.
• Conduction: Heat transfer through direct contact between particles. Example: Touching a hot pan.

• Convection: Heat transfer through the movement of fluids (liquids or gases). Example: Boiling water.

• Radiation: Heat transfer through electromagnetic waves. Example: Feeling the warmth of the sun.
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Q2. What is addendum Circle?
Ans. 
An addendum circle is a circle that is tangent to two other circles and intersects them at their points of tangency.
• Addendum circle is commonly used in gear design to determine the correct size of gears.

• It is tangent to two other circles, known as the base circles, and intersects them at their points of tangency.

• The addendum circle is larger in diameter than the base circles, allowing for the teeth of the gears to mesh
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Q3. Explain Rankin cycle
Ans. 
Rankine cycle is a thermodynamic cycle used in steam power plants to generate electricity.
• Rankine cycle involves four processes: compression, heating, expansion, and cooling.

• Steam is compressed in a pump, heated in a boiler to high temperature and pressure, expanded in a turbine, and then cooled in a condenser.

• The cycle is used in steam power plants to convert thermal energy into mechanical work, which is then used to
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Aptitude test was held by an online platform.

Q1. What is the second law of thermodynamics?
Ans. 
The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.
• Entropy in a closed system tends to increase over time

• Heat energy naturally flows from hot to cold objects

• Efficiency of energy conversion processes is limited by the second law of thermodynamics
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Q2. What is the difference between creep and fatigue?
Ans. 
Creep is the slow, time-dependent deformation of a material under constant load, while fatigue is the weakening of a material due to repeated loading and unloading.
• Creep is a time-dependent phenomenon, while fatigue is a cyclic phenomenon.

• Creep occurs at high temperatures and constant stress, while fatigue occurs at lower temperatures and varying stress levels.

• Creep leads to permanent deformation, while fatigue can lea...read more
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Q3. What is thermocouple?
Ans. 
A thermocouple is a temperature sensor that consists of two different metals joined together at one end, which produces a voltage proportional to the temperature difference between the junction and the other end.
• Consists of two different metals joined together at one end

• Produces a voltage proportional to the temperature difference

• Commonly used in industrial applications for temperature measurement
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Q4. What is t-t-t diagram?
Ans. 
T-t-t diagram is a time-temperature-transformation diagram used in materials science to understand the transformation of phases in a material.
• T-t-t diagram shows the relationship between time, temperature, and the transformation of phases in a material.

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

• T-t-t diagrams are commonly used in metallurgy to understand the phase
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Q5. What is annealing?
Ans. 
Annealing is a heat treatment process used to soften metals and increase their ductility.
• Annealing involves heating a metal to a specific temperature and then slowly cooling it to room temperature.

• This process helps to relieve internal stresses, improve machinability, and enhance electrical conductivity.

• Examples of metals that are commonly annealed include steel, copper, and aluminum.
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Q6. What is the critical temperature of steel?
Ans. 
The critical temperature of steel is the temperature at which it loses its magnetic properties.
• The critical temperature of steel is around 770°C (1420°F).

• Above this temperature, steel becomes non-magnetic and undergoes a phase change.

• The critical temperature varies depending on the type of steel and its composition.
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Q7. Types of steel?how we can differentiate them?
Ans. 
Types of steel include carbon steel, alloy steel, stainless steel, and tool steel. They can be differentiated based on their composition, properties, and applications.
• Carbon steel contains primarily carbon and iron, with low amounts of other elements. It is commonly used in construction and manufacturing.

• Alloy steel contains additional elements such as manganese, silicon, and copper to enhance its properties. It is use...read more
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Q1. Tell about the difference between Normalizing and Quenching
Ans. 
Normalizing and quenching are heat treatment processes used to alter the properties of metals.
• Normalizing involves heating the metal to a temperature above its critical point and then cooling it in still air. This process improves the uniformity of the metal's grain structure and reduces internal stresses.

• Quenching involves heating the metal to a high temperature and then rapidly cooling it in a liquid, usually water o...read more
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Q2. What are ferrous metals and and formulas
Ans. 
Ferrous metals are those that contain iron as their main constituent.
• Ferrous metals are magnetic and have high tensile strength.

• They are used in construction, manufacturing, and transportation industries.

• Examples include steel, cast iron, and wrought iron.

• The formula for steel is Fe+C, for cast iron is Fe+C+Si, and for wrought iron is Fe+C+Si+Mn.
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Q1. What are the mode of heat transfer?
Ans. 
The modes of heat transfer are conduction, convection, and radiation.
• Conduction: Heat transfer through direct contact between particles. Example: Touching a hot stove.

• Convection: Heat transfer through the movement of fluids (liquids or gases). Example: Boiling water.

• Radiation: Heat transfer through electromagnetic waves. Example: Feeling the warmth of the sun.
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Q2. What is addendum circle ?
Ans. 
An addendum circle is a circle that is tangent to two other circles and intersects a third circle.
• An addendum circle is used in gear design to create a smooth transition between gears.

• It is also used in mechanical engineering for designing mechanisms with gears.

• The addendum circle is tangent to the base circle of the gear and intersects the pitch circle.
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Q1. How blast furnace works ?
Ans. 
Blast furnace is a smelting furnace used to extract iron from iron ore.
• Iron ore, coke, and limestone are added to the top of the furnace.

• Hot air is blown into the bottom of the furnace to create a high temperature.

• The coke reacts with the hot air to produce carbon monoxide, which reduces the iron ore to iron.

• The limestone reacts with impurities in the iron ore to form slag, which is removed from the bottom of the furna...read more
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Q2. What is sinter? And how to make sinter in sinter plant and
Ans. 
Sinter is a high-quality raw material used in blast furnaces. It is made by heating iron ore fines and other materials.
• Sintering is a process of compacting and forming a solid mass of material by heat or pressure without melting it.

• In a sinter plant, iron ore fines, coke breeze, limestone, and other additives are mixed and granulated.

• The granulated mixture is then fed onto a sinter machine, where it is heated to form a...read more
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Q3. What is the different sizes of sinter?
Ans. 
Sinter is a porous material formed by heating a mixture of iron ore fines, limestone, and coke breeze. The size of sinter varies depending on its intended use.
• Sinter is used in the production of iron and steel.

• The size of sinter can range from small pellets to large blocks.

• The size of sinter is determined by the size of the sintering machine used.

• Sinter can be classified into different sizes such as fine, coarse, and l...read more
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Q4. Which iron forms in blast furnace?
Ans. 
The iron formed in blast furnace is pig iron.
• Pig iron is the product of smelting iron ore with coke and limestone in a blast furnace.

• It is a brittle material with high carbon content and contains impurities like sulfur, phosphorus, and silicon.

• Pig iron is further processed to produce steel or cast iron.

• The composition of pig iron varies depending on the quality of the iron ore and the process used in the blast furnace.
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Test includes of 4 segments,
Personality, English, Aptitude(Reasoning and mathematics), Technical (Field related).

Q1. Basic Technical questions
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Q2. Questions related to companies interest
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