Vaaman Engineers Shift Engineer Interview Questions and Answers

Normal introduction and interview

Q1. Type of electrical motor
Ans. 
There are various types of electrical motors including AC motors, DC motors, synchronous motors, and induction motors.
• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in applications where speed control is important, such as in electric vehicles

• Synchronous motors: used in applications where precise speed control is required, such as in clocks and timers

• Induction motors: widely...read more
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Q2. 3 phase induction motor starter
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Q3. Protection of transformer
Ans. 
Protection of transformer involves measures to prevent damage from overcurrent, overvoltage, and overheating.
• Use overcurrent protection devices such as fuses and circuit breakers to prevent damage from excessive current flow.

• Install overvoltage protection devices like surge arresters to safeguard against voltage spikes.

• Implement temperature monitoring systems to prevent overheating, such as thermal sensors and cooling ...read more
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Q4. ACB VCB maintenance
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Q5. Star delta connection
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Q1. What is Full form DOL starter
Ans. 
DOL starter stands for Direct-On-Line starter, used to start motors by directly connecting them to the power supply.
• DOL starter is the simplest and most common type of motor starter.

• It directly connects the motor to the power supply without any intermediate starting method.

• It provides full voltage to the motor during starting, which can cause high inrush current.

• DOL starters are suitable for small to medium-sized motor...read more
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Q2. What is APFC PANEL
Ans. 
APFC PANEL stands for Automatic Power Factor Correction Panel, used to maintain power factor in electrical systems.
• APFC PANEL automatically monitors and corrects the power factor of electrical systems.

• It helps in reducing electricity bills by maintaining a high power factor.

• APFC PANELs are commonly used in industries and commercial buildings.

• They consist of capacitors that are switched on and off based on the load requ...read more
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Q3. Star dalta conection
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Q1. As per company policy requirement condition
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Q1. As per company policy requirement
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Q1. What is ATS, transformer maintenance procedure, protection of transformer, maintenance procedure of motor, protection of motor, knowledge about SAP
Ans. 
ATS stands for Automatic Transfer Switch. It is used to transfer power supply between two sources. Transformer and motor maintenance procedures and protection methods are essential for their efficient operation. SAP is a software used for enterprise resource planning.
• ATS is used to automatically switch power supply between two sources, ensuring uninterrupted power supply.

• Transformer maintenance involves regular inspect...read more
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Q2. Knowledge about DG set, and spare material
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Q3. Rating of HT motor and FLC of HT motor
Ans. 
HT motor rating is the maximum power it can handle and FLC is the current it draws at full load.
• HT motor rating is expressed in kilowatts (kW) or megawatts (MW).

• FLC of HT motor is the full load current it draws at rated voltage and frequency.

• FLC is expressed in amperes (A) and varies depending on the motor's power rating and efficiency.

• For example, a 1 MW HT motor may have a FLC of 1000 A at 11 kV.

• The rating and FLC of...read more
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Q4. Plant EHT system and single line diagram of plants.
Ans. 
Plant EHT system and single line diagram of plants.
• EHT system refers to Extra High Tension system used in power plants

• Single line diagram shows the electrical connections between different components

• It is important to have a clear and accurate diagram for safety and maintenance purposes
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Q5. Knowledge about HT and LT breaker.
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Q1. What are the major parts in power transformer?
Ans. 
The major parts in a power transformer include the core, windings, insulation, cooling system, and tap changer.
• Core: Provides a path for magnetic flux and is usually made of laminated steel sheets.

• Windings: Consist of primary and secondary coils that transfer electrical energy.

• Insulation: Prevents electrical leakage and ensures safety.

• Cooling System: Keeps the transformer within operating temperature limits, commonly u...read more
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Q1. What do you want to switch ?
Ans. 
I want to switch electrical circuits and devices.
• Switching electrical circuits to control the flow of electricity.

• Switching electrical devices on or off.

• Switching between different power sources.

• Switching between different modes or settings of electrical equipment.

• Switching between different electrical connections or configurations.
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Just work with R.S. Aggarwal book

Q1. Just read and practice basics strong and practice previous GATE QUESTIONS
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Q2. Intro abt ur self and family back ground Tell about your interest
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Q3. How much u know about our concern
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Q1. Just be genuine and clear
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