Minda Silca Engineering Design Engineer Interview Questions and Answers

Q1. HOW TO CALCULATE CT CURRENT
Ans. 
CT current can be calculated by dividing the primary current by the turns ratio of the current transformer.
• CT current = Primary current / Turns ratio

• Primary current is the current flowing through the primary conductor

• Turns ratio is the ratio of the number of turns in the primary winding to the number of turns in the secondary winding
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Q2. WHAT IS LOCKOUT REALY
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Lockout is a safety procedure used to ensure that machinery or equipment is properly shut off and cannot be restarted until maintenance or servicing is completed.
• Lockout involves isolating energy sources to prevent accidental startup.

• Lockout devices like padlocks and tags are used to physically lock equipment.

• Lockout procedures must be followed to prevent accidents and injuries.

• Examples of lockout include locking out e...read more
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Q3. WHAT IS IP65 FOR PANEL
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IP65 for panel refers to the level of protection against dust and water ingress.
• IP65 rating means the panel is dust tight and protected against water jets from any direction.

• The first digit '6' indicates the level of protection against solid objects like dust.

• The second digit '5' indicates the level of protection against water ingress.

• Commonly used in outdoor or industrial applications where the panel may be exposed to...read more
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Q4. What is TCS AND MASTER TRIP REALY
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TCS and Master Trip Relay are protective devices used in electrical systems to prevent damage during faults.
• TCS stands for Time Current Characteristic Relay, which operates based on the relationship between time and current to trip the circuit breaker during faults.

• Master Trip Relay is a relay that receives signals from various protective relays and initiates a trip signal to disconnect the circuit in case of a fault.

• B...read more
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Q5. WHAT IS LSC 2A AND LSC 2B
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LSC 2A and LSC 2B are standards for lighting in commercial and industrial buildings.
• LSC 2A and LSC 2B are part of the Lighting Power Density (LPD) requirements in building codes.

• LSC 2A is for commercial buildings while LSC 2B is for industrial buildings.

• They specify the maximum allowable power consumption for lighting per unit area in a building.

• For example, LSC 2A may require a maximum LPD of 0.9 watts per square foot
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Q6. What REF PROTECTION and HIgh impedance and low impedance
Ans. 
REF protection is used to prevent damage to equipment from electrical faults. High impedance protection is used for sensitive equipment, while low impedance protection is used for power systems.
• REF protection is used to detect ground faults and prevent damage to equipment.

• High impedance protection is used for sensitive equipment that requires high accuracy and low fault currents.

• Low impedance protection is used for pow...read more
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Q7. ANSI CODE FOR VERIOUS PROTECTION
Ans. 
ANSI codes are used to identify various types of protection devices in electrical systems.
• ANSI code 50/51 is for instantaneous overcurrent protection

• ANSI code 67 is for directional power protection

• ANSI code 87 is for differential protection

• ANSI code 59 is for overvoltage protection
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Q1. Motor selection for rotary table
Ans. 
Motor selection for rotary table involves considering torque requirements, speed, size constraints, and control system compatibility.
• Consider torque requirements for the rotary table based on load and acceleration/deceleration needs

• Select a motor with appropriate speed capabilities to meet the desired rotation speed

• Ensure the motor size fits within the constraints of the rotary table design

• Check compatibility with the ...read more
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Q2. Pneumatic cylinder selection
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Qualitative and quantitative questions

Q1. Based on Experience and technical knowledge.
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Q2. Any project that has been done by you. What was your role in that project.
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Q3. Manufacturing process and guidelines
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Manufacturing process and guidelines are essential for ensuring quality and efficiency in production.
• Understanding the specific requirements of the product being manufactured

• Selecting the appropriate materials and tools for the manufacturing process

• Following established guidelines and standards to ensure consistency and quality

• Regularly monitoring and evaluating the manufacturing process for improvements

• Training and ed...read more
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Q1. Basic questions. Reason for leaving previous job.
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Q1. After shortlisting of resume, there was a technical interview -1 followed by an interview with manager for technical analysis Next was hr round.
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Q2. Design related questions on som, mechanical designs and the application of these concepts in your previous experience
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Application of technical knowledge in your previous experience

Q1. As per work experience in previous company
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Q2. Technical knowledge
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Q1. Need theoretical knowledge.
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Q2. Need knowledge about work of your previous organisation
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Q1. Manufacturing knowledge read from the drawing
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Q2. Design and engineering knowledge
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Q3. Sheet metal work experience
Ans. 
I have 3 years of experience in sheet metal work, including designing and fabricating components for various projects.
• Experience in designing sheet metal components using CAD software

• Knowledge of different types of sheet metal materials and their properties

• Hands-on experience in fabricating sheet metal parts using various tools and techniques

• Ability to interpret engineering drawings and specifications accurately

• Experie...read more
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Q1. Previous employment details
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Q2. Salary discussion
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Q3. Company benefits
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Q1. Details of current work Technical
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Q1. Mainly GD&T, technical
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