L&T Technology Services Interview Questions, Process, and Tips

Q1. Medical device classification
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Q2. Class A, B and C
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Q1. What is bcc and fcc
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BCC and FCC are crystal structures in materials science. BCC has atoms at the corners and center of the cube, while FCC has atoms at the corners and face centers.
• BCC stands for Body-Centered Cubic, with atoms at the corners and one in the center of the cube.

• FCC stands for Face-Centered Cubic, with atoms at the corners and one on each face of the cube.

• BCC has a coordination number of 8, while FCC has a coordination numb...read more
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Q2. What is psi how do you calculate
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Psi stands for pounds per square inch and is a unit of pressure. It is calculated by dividing the force applied by the area over which the force is distributed.
• Psi is a unit of pressure used in various industries such as engineering, automotive, and manufacturing.

• To calculate psi, you divide the force (in pounds) by the area (in square inches) over which the force is distributed.

• For example, if a force of 100 pounds is...read more
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Question on strings, networking and oops

Q1. Types of Plastic?
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There are various types of plastics, each with unique properties and uses.
• Common types include PET, PVC, HDPE, LDPE, PP, PS, and ABS

• Plastics can be categorized as thermosetting or thermoplastic

• Each type of plastic has different characteristics such as flexibility, durability, and heat resistance
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Q2. Plastic categories?
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Q3. Diff b/w hot runner & cold runner?
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Q4. Selection of material?
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Selection of material is based on factors like mechanical properties, cost, availability, and environmental impact.
• Consider mechanical properties such as strength, stiffness, and toughness

• Evaluate cost and availability of materials

• Assess environmental impact and sustainability

• Examples: steel for high strength applications, aluminum for lightweight designs, and plastics for cost-effective solutions
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Q1. Describe Injection molding
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Injection molding is a manufacturing process for producing parts by injecting material into a mold.
• Material is heated and injected into a mold cavity

• The material cools and solidifies, taking the shape of the mold

• Commonly used for producing plastic parts in mass production

• Used in various industries such as automotive, electronics, and consumer goods
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Q2. Molding method?
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Various molding methods are used in design engineering to create products with different materials and shapes.
• Injection molding: commonly used for mass production of plastic parts

• Blow molding: used for hollow objects like bottles

• Compression molding: suitable for materials like rubber and thermosetting plastics

• Rotational molding: used for large, hollow products like tanks and playground equipment
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