L&T Technology Services Piping Engineer Interview Questions and Answers

In aptitude test there were 2 sections
1. Technical test which contains basic of mechanical discipline since this was College placement and in mechanical engineering there is no subject like piping engineering so there were no questions from piping engineering.
2. Aptitude test was different from other companies. In aptitude test we were asked to attempt as many as questions in stipulated time period for example tick on correct spelling, in this round we got 2 mins in which we have to attempt as many as questions as we can.

Q1. Stress strain curve, velocity and acceleration
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Q2. Effect of alloying elements on steel
Ans. 
Alloying elements can improve steel's strength, hardness, corrosion resistance, and other properties.
• Alloying elements can change the crystal structure of steel, affecting its properties.

• Chromium improves corrosion resistance and hardness, and is used in stainless steel.

• Manganese improves strength and toughness.

• Nickel improves toughness and corrosion resistance.

• Carbon increases hardness and strength, but reduces ductil...read more
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Q1. Project specific questions.
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Q2. Elements of Iron carbide diagram.
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Iron carbide diagram shows the relationship between temperature, carbon content, and phases of iron and iron carbide.
• Also known as the Fe-C diagram

• Displays the transformation of iron and iron carbide at different temperatures and carbon concentrations

• Consists of three regions: austenite, ferrite, and cementite

• Used to determine the microstructure of steel and cast iron

• Helps in predicting the properties of steel and cast
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Q3. What is Compressible and incompressible fluids and example..
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Compressible fluids can be compressed while incompressible fluids cannot be compressed.
• Compressible fluids have a variable density and volume, while incompressible fluids have a constant density and volume.

• Examples of compressible fluids include gases like air and steam, while examples of incompressible fluids include liquids like water and oil.

• Compressible fluids follow the gas laws, while incompressible fluids follow...read more
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Q1. Tell me something about youself
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Q2. What do you know about our company?
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