L&T Technology Services Piping Design Engineer Interview Questions and Answers

Q1. What is header clearance?
Ans. 
Header clearance refers to the space required for the installation and maintenance of piping headers.
• Header clearance is the distance between the top of the header and the ceiling or any obstruction above it.

• It is important to ensure sufficient clearance for proper installation, maintenance, and operation of the piping system.

• Examples of obstructions that may require clearance include beams, ductwork, and other piping
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Q2. 2200 _2500mm above ffl
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Q3. What information we provide to civil department ?
Ans. 
We provide civil department with information on piping layout, support requirements, material specifications, and coordination details.
• Piping layout drawings

• Support requirements for the piping system

• Material specifications for the piping components

• Coordination details with civil structures and equipment

• Updates on any changes or modifications to the piping design
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Related to piping and SOM

Q1. Properties of material
Ans. 
Properties of material refer to characteristics such as strength, hardness, ductility, and conductivity.
• Strength: ability to withstand applied stress without failure (e.g. tensile strength)

• Hardness: resistance to deformation or scratching (e.g. Rockwell hardness)

• Ductility: ability to deform without breaking (e.g. elongation at break)

• Conductivity: ability to conduct heat or electricity (e.g. thermal conductivity)
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Q2. 3rd angle 1st angle
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Q1. IC engine working
Ans. 
IC engine works by converting chemical energy into mechanical energy through combustion of fuel inside the engine cylinders.
• IC engine intake air and fuel mixture into the cylinder

• Compression of the air-fuel mixture increases its temperature and pressure

• Ignition of the compressed mixture by spark plug causes combustion

• Expansion of the gases pushes the piston down, creating mechanical energy

• Exhaust gases are expelled thr
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General Apti test which includes quants, logic, english

Q1. Enthalpy/ entropy
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Q2. Types of boilers and components
Ans. 
Boilers are used to generate steam or hot water for heating or power generation. Components include burners, tubes, drums, and controls.
• Types of boilers include fire tube, water tube, and electric boilers

• Components of a boiler include burners, tubes, drums, economizers, superheaters, and controls

• Examples of boilers: Fire tube - Scotch marine boiler, Water tube - Babcock and Wilcox boiler, Electric - Electrode boiler
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Q1. Resume base question
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Q2. What is 1 st law of thermodynamic
Ans. 
The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted.
• Energy can be transferred between systems or converted from one form to another.

• The total energy in a closed system remains constant.

• Mathematically expressed as: ΔU = Q - W, where ΔU is the change in internal energy, Q is heat added to the system, and W is work done by the system.

• Example: When a gas is compr...read more
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