Sigma Electric Manufacturing Corporation Interview Questions and Answers

Q1. Dol starter control wiring and Power wiring
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Q2. Plc and vfd .conver sestam
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Q1. About your self
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Q2. Quality related
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Q3. What is the 7qc tools
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The 7QC tools are a set of quality control tools used for process improvement and problem-solving in manufacturing and other industries.
• Check sheet: Used to collect and organize data for analysis.

• Pareto chart: Helps identify the most significant factors contributing to a problem.

• Cause and effect diagram (Fishbone diagram): Used to identify and analyze potential causes of a problem.

• Histogram: Represents data distributio...read more
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Q4. What is the 8d usses
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8D is a problem-solving method used to identify, correct, and prevent recurring problems.
• 8D stands for 8 disciplines, each representing a step in the problem-solving process

• It involves identifying the problem, implementing short-term containment actions, root cause analysis, corrective actions, and preventive measures

• Examples of tools used in 8D include fishbone diagrams, 5 Whys, and control plans
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Q5. Quality related questions
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Q1. Type of circuit breakers
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Circuit breakers protect electrical circuits by interrupting current flow during faults, ensuring safety and preventing damage.
• 1. Miniature Circuit Breaker (MCB): Protects against overloads and short circuits. Example: MCBs rated for 6A, 10A, etc.

• 2. Molded Case Circuit Breaker (MCCB): Used for medium voltage applications, protects against overloads and short circuits. Example: MCCB rated for 100A.

• 3. Earth Leakage Circu...read more
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Q2. Type of fault
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Electrical faults are malfunctions in circuits, leading to failures or hazards like short circuits or overloads.
• Short Circuit: Occurs when current flows through an unintended path, e.g., damaged insulation.

• Open Circuit: A break in the circuit preventing current flow, e.g., a blown fuse.

• Ground Fault: A fault where current leaks to the ground, often due to insulation failure.

• Overload: Excess current flow due to too many ...read more
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Q3. Safety kit use in electrician
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A safety kit for electricians includes essential gear to protect against electrical hazards and ensure safe working conditions.
• Personal Protective Equipment (PPE) such as insulated gloves to prevent electric shock.

• Safety goggles to protect eyes from sparks and debris.

• Hard hats to shield the head from falling objects.

• Insulated tools to reduce the risk of accidental electrical contact.

• First aid kit for immediate response...read more
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Q4. Type of motor
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Electric motors convert electrical energy into mechanical energy, widely used in various applications.
• Types include AC motors (e.g., induction motors) and DC motors (e.g., brushed and brushless motors).

• Induction motors are commonly used in industrial applications due to their robustness.

• DC motors are often found in applications requiring variable speed control, like electric vehicles.

• Stepper motors are used in precisio...read more
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