Cummins Design Engineer Interview Questions and Answers

Q1. Refrigeration related questions
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Q2. Stress and strain
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Q3. Free body diagram of beam
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A free body diagram of a beam shows all external forces acting on the beam.
• Identify all external forces acting on the beam such as gravity, applied loads, and reactions at supports.

• Draw a simple sketch of the beam with arrows representing the direction and magnitude of each force.

• Label each force with appropriate symbols or letters for clarity.

• Ensure that the forces are correctly positioned and oriented relative to the
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Q1. What is positive displacement and negative dispalcement pump?
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Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge pipe. Negative displacement pumps move fluid by creating a vacuum to draw in and push out the fluid.
• Positive displacement pumps trap a fixed amount of fluid and force it through the discharge pipe

• Examples include gear pumps, piston pumps, and diaphragm pumps

• Negative displacement pumps create a vacuum to draw in and pu...read more
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Q2. What material is used for casing?why?
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The material used for casing is typically chosen based on factors such as durability, weight, cost, and aesthetics.
• Common materials for casing include plastic, aluminum, steel, and carbon fiber.

• Plastic is often used for its lightweight properties and cost-effectiveness.

• Aluminum is chosen for its strength-to-weight ratio and corrosion resistance.

• Steel is preferred for its durability and impact resistance.

• Carbon fiber is...read more
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Q1. Role responsibility,
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Q1. Tool test, on NX
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60 marks
30 marks aptitude
30 marks mechanical mainly kinematics

Topic related to life without mobile

Q1. Related to our curriculum project , welding and casting.
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Q1. Tell me about yourself Family background Hobbies
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Questions on logical and quants

Q1. What is Bernoulli principle?
Ans. 
Bernoulli principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.
• States that as the speed of a fluid increases, its pressure decreases

• Used to explain lift in airplane wings

• Applies to various fluid dynamics situations such as flow through pipes
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Q2. What is stress and how it can be measured?
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Stress is a force acting on a material that causes deformation. It can be measured using techniques like strain gauges and load cells.
• Stress is a measure of the internal forces within a material resisting deformation.

• It is typically measured in units of force per unit area, such as Pascals or pounds per square inch.

• Common methods of measuring stress include strain gauges, load cells, and extensometers.

• Stress can be cat...read more
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