Burckhardt Compression Design Engineer Interview Questions and Answers for Experienced

Q1. Gd&t, Surface roughnesss
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Q1. Everything regarding your experience
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Q1. Everything regarding experience
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Q1. Problems you faced in job and your decision making capabilities
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Q1. Regarding your job change decision
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Q1. Different units of pressure
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Units of pressure include pascal, bar, atmosphere, and psi.
• Pascal (Pa) is the SI unit of pressure

• Bar is commonly used in meteorology and scuba diving

• Atmosphere (atm) is the average pressure at sea level on Earth

• Pounds per square inch (psi) is used in engineering and automotive industries
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Q2. Failure stress for spring
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Failure stress for spring is the maximum stress a spring can withstand before permanent deformation or breakage.
• Failure stress is determined by the material properties of the spring.

• Factors affecting failure stress include material type, manufacturing process, and design considerations.

• Examples of failure stress for springs include tensile strength, yield strength, and ultimate strength.
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Q3. Sub-type or specific failure stress for springs
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Sub-type or specific failure stress for springs can include yield stress, ultimate tensile stress, fatigue stress, etc.
• Different types of springs may have different failure stresses

• Yield stress is the point at which a material begins to deform plastically

• Ultimate tensile stress is the maximum stress a material can withstand before failure

• Fatigue stress is the stress level at which a material fails after repeated loadin
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Q4. Synchronous speed defination and formula
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Synchronous speed is the speed at which the magnetic field rotates in a synchronous motor.
• Synchronous speed is determined by the frequency of the power supply and the number of poles in the motor.

• Formula for synchronous speed: Ns = 120f / P, where Ns is synchronous speed in RPM, f is frequency in Hz, and P is number of poles.

• For example, a 4-pole motor connected to a 60 Hz power supply would have a synchronous speed of
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Q5. Types of stresses and examples of each
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Types of stresses include tensile, compressive, shear, bending, and torsional.
• Tensile stress: pulling force that stretches material apart (e.g. stretching a rubber band)

• Compressive stress: pushing force that squeezes material together (e.g. pressing on a spring)

• Shear stress: force that causes layers of material to slide past each other (e.g. cutting paper with scissors)

• Bending stress: combination of tensile and compres...read more
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Q6. Difference between stress and pressure
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Stress is internal resistance to deformation, while pressure is force applied over an area.
• Stress is a measure of the internal resistance of a material to deformation under an applied force.

• Pressure is the force applied perpendicular to the surface of an object per unit area.

• Stress is a tensor quantity, while pressure is a scalar quantity.

• Examples: A rubber band under tension experiences stress, while a balloon filled
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Topic was a random one

Q1. Wheatstone bridge
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Q1. Tell me about your self
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Q2. Compressor working
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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.
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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
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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
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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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