MAHLE Behr India Diploma Trainee Engineer Interview Questions and Answers

Q1. Basic ectronic related questions Family background Current transformer Potential transformer
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Q2. Basic fundamentals Working principle of Induction motor
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Induction motor works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.
• Induction motor has a stator and a rotor

• Stator has a set of coils that are supplied with AC current

• This creates a rotating magnetic field which induces current in the rotor

• The rotor then starts rotating due to interaction with the magnetic field

• Induction motor is widely used in industries for various
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Q1. Depends on experience
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Q2. Related to systematic approach
Ans. Problem solving tools, OEE, FPY, Root cause analysis. 14Q, 5S
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Casting should be thorough

Aluminium die Casting

Q1. Write and explain GD&T symbols?
Ans. 
GD&T symbols are used to specify the geometric requirements of a part or assembly.
• GD&T stands for Geometric Dimensioning and Tolerancing

• Symbols include: flatness, circularity, perpendicularity, concentricity, position, and more

• Each symbol has a specific meaning and is used to communicate precise engineering requirements

• GD&T is used in industries such as aerospace, automotive, and manufacturing

• Example: A position symbol...read more
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Q2. Explain Cp, Cpk & Pp, Ppk?
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Cp, Cpk, Pp, and Ppk are statistical process control indices used to measure process capability and performance.
• Cp and Cpk measure how well a process meets its specifications, with Cpk being more accurate for non-centered processes.

• Pp and Ppk measure how well a process performs relative to its natural variation, with Ppk being more accurate for non-centered processes.

• All four indices are calculated using the process me...read more
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Q1. Related to GD&T, CNC programming knowledge, SPC, Fixture design and development, Tool design and development.
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Total number of marks is 20 , required passing marks is 16,

Q1. Tell us about ohm's law
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given constant resistance.
• Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

• It is named after German physicist Georg Simon Ohm.

• It is commonly used in electrical engineering to calculate the relationship between voltage, current, and resistance.

• Ohm's law is ...read more
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Q2. How many types of transformer
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There are mainly two types of transformers: Step-up transformers and Step-down transformers.
• Step-up transformers increase the voltage from primary to secondary winding.

• Step-down transformers decrease the voltage from primary to secondary winding.

• Examples include power transformers, distribution transformers, and instrument transformers.
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