John Crane Sealing Systems India Mechanical Engg. Design Interview Questions and Answers for Experienced

Q1. What is mean by kinetic energy
Ans. 
Kinetic energy is the energy possessed by an object due to its motion.
• Kinetic energy is directly proportional to the mass of an object and the square of its velocity.

• The formula for kinetic energy is KE = 0.5 * m * v^2, where m is the mass of the object and v is its velocity.

• Examples of kinetic energy include a moving car, a swinging pendulum, or a flying bird.
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Q1. They asked irrelevant questions only
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Q1. Explain about your previous experience.
Ans. 
I have 5 years of experience working as a Design Engineer in the automotive industry.
• Designed components for new vehicle models

• Collaborated with cross-functional teams to ensure design feasibility

• Utilized CAD software to create detailed drawings

• Performed testing and analysis to validate designs

• Implemented cost-effective solutions to improve product performance
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Q1. Explain the Projects that you handled in previous organisation.
Ans. 
I have handled various projects in my previous organisation including designing new products, improving existing designs, and collaborating with cross-functional teams.
• Designed new products from concept to production stage

• Improved existing designs to enhance performance and reduce costs

• Collaborated with cross-functional teams including manufacturing, marketing, and quality control

• Managed project timelines and budgets e...read more
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Q1. What is Best efficiency of pump
Ans. 
Best efficiency of a pump is the point where it operates at maximum output with minimum energy consumption.
• Best efficiency is the point on the pump curve where the highest flow rate is achieved with the lowest power consumption.

• It is important to operate the pump at or near its best efficiency point to reduce energy consumption and increase the lifespan of the pump.

• Factors that affect the best efficiency point include ...read more
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Q2. What is the slip angle in Impeller
Ans. 
Slip angle in impeller refers to the angle between the direction of fluid flow and the blade angle.
• Slip angle is an important parameter in impeller design as it affects the performance of the pump.

• It is generally kept small to minimize energy losses due to fluid slip.

• Slip angle can be calculated using computational fluid dynamics (CFD) simulations.

• For example, a slip angle of 5-10 degrees is common in centrifugal pumps
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Q1. What is the function of Valve? what is the generic material used for valve ? Relation between temperature and pressure ?
Ans. 
Valves are mechanical devices used to control the flow of fluids or gases in a system. They are typically made of materials like stainless steel, brass, or PVC.
• Valves control the flow of fluids or gases in a system

• Common materials used for valves include stainless steel, brass, and PVC

• Temperature and pressure are related in that as temperature increases, pressure also tends to increase
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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?
Ans. 
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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Q1. Forging process , bearing loads, type of bearing
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Q2. Gd&t , DFMEA, heat treatment,
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Q1. Technical support
Ans. Trouble shooting and resolving power Customers satisfaction
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Q2. Hydraulic Maintenance
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