Quanta Process Solutions Structural 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. Basics of induction motor
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Q2. Any applicable standards
Ans. 
Design engineers must adhere to applicable standards to ensure quality and safety of products.
• Design engineers should be familiar with industry-specific standards such as ISO 9001, ASME Y14.5, and ASTM.

• Adherence to standards ensures product quality, safety, and compliance with regulations.

• Standards may vary depending on the industry and type of product being designed.

• Regular updates and training on new standards are es
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Q1. What is transformer differential protection, and how is current transformer (CT) sizing determined?
Ans. 
Transformer differential protection is a method to protect transformers from internal faults. CT sizing is determined based on the transformer's primary current rating.
• Transformer differential protection compares the currents entering and leaving the transformer to detect internal faults.

• Current transformers (CTs) are sized based on the transformer's primary current rating and the desired accuracy of the protection sch...read more
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Q2. What is unbalanced protection in electrical systems?
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Unbalanced protection in electrical systems is a type of protection that detects and responds to imbalances in current or voltage levels.
• Unbalanced protection is used to detect faults such as phase-to-phase or phase-to-ground faults in electrical systems.

• It helps prevent damage to equipment and ensures the safety of personnel by quickly isolating the faulty section of the system.

• Examples of unbalanced protection device...read more
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Q3. Is the use of a smartphone camera flasher permitted while assessing old switchgears for modernization?
Ans. 
Yes, the use of a smartphone camera flasher is permitted while assessing old switchgears for modernization.
• Using a smartphone camera flasher can help illuminate dark areas and improve visibility while assessing old switchgears.

• It can assist in capturing clear and detailed images for documentation and analysis.

• Ensure that the flash does not interfere with any sensitive equipment or cause any safety hazards.

• Consider usin...read more
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Q4. What is your current CTC, and what are your salary expectations?
Ans. 
I am currently earning X amount and my salary expectations are Y amount.
• Mention your current CTC (Cost to Company)

• Clearly state your salary expectations

• Consider factors like experience, industry standards, and job responsibilities when stating salary expectations
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Q5. What are your reasons for wanting to leave your current company?
Ans. 
Seeking new challenges and opportunities for growth.
• Desire for new challenges and learning opportunities

• Limited growth potential in current role

• Seeking a more innovative and dynamic work environment
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Q6. What inputs do you collect during a site visit for the assessment of existing switchgear when considering the retrofit of circuit breakers?
Ans. 
During a site visit for assessing existing switchgear for retrofitting circuit breakers, inputs collected include equipment specifications, condition, age, and load requirements.
• Collect equipment specifications such as voltage rating, current rating, and interrupting capacity.

• Assess the condition of the existing switchgear to determine if it can accommodate the new circuit breakers.

• Consider the age of the switchgear to...read more
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Q1. Tell me about yourself.
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Q2. What are your reasons for wanting to leave your current company?
Ans. 
Seeking new challenges and opportunities for growth.
• Desire for new challenges and learning opportunities

• Limited growth potential in current role

• Seeking a more innovative and dynamic work environment
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Q3. What are your reasons for wanting to change your career?
Ans. 
Seeking new challenges and opportunities for growth in a field that aligns more closely with my interests and skills.
• Desire for new challenges and opportunities

• Interest in pursuing a career that aligns better with skills and passions

• Seeking professional growth and development

• Exploring a field with more potential for advancement

• Wanting to broaden knowledge and experience in a different industry
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Q4. What is your current Cost to Company (CTC), and what is your expected CTC?
Ans. 
My current CTC is $80,000 per year, and my expected CTC is $90,000 per year.
• Current CTC: $80,000 per year

• Expected CTC: $90,000 per year

• Reasons for expecting increase in CTC (if applicable)
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Q5. Are you open to relocation?
Ans. 
Yes, I am open to relocation for the right opportunity.
• I am willing to relocate for the right job opportunity that aligns with my career goals.

• I am open to exploring new locations and experiencing different cultures.

• I understand that relocation may be necessary for career advancement and growth.
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Q1. Detail on the projects I have worked
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Q1. Tell me about yourself. Why do you want to work at this company?
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Q2. Walk me through your resume. How did you hear about this position?
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About power system control system

Present trends and tgey willgive 10 min to think and note down

Q1. About resume get good knowledge of what you have put in resume
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Q2. And basic electricals
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Q1. Power factor correction
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Q2. Working of circuit breaker
Ans. 
Circuit breakers are electrical switches designed to protect electrical circuits from damage caused by overload or short circuit.
• Circuit breakers automatically trip when they detect an overload or short circuit in the electrical system.

• They interrupt the flow of electricity to prevent damage to the circuit or electrical devices.

• Circuit breakers can be reset manually after tripping to restore power to the circuit.

• There ...read more
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Q1. Tell me about yourself
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Q2. Tell me about your role in previous company
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