Bechtel Enka Electrical Technician Interview Questions and Answers

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Q1. What is speed difference between stator's rotating magnetic field and rotor's rmf?
Ans. 
The speed difference between stator's rotating magnetic field and rotor's rmf is called slip.
• The slip is necessary for inducing current in the rotor and producing torque.

• The slip is typically around 1-3% in most induction motors.

• Higher slip values can indicate issues with the motor such as overload or mechanical problems.
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Q2. What is induction motor
Ans. 
An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
• Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.

• They do not require brushes to transfer power to the rotor, making them more reliable and maintenance-free compared to brushed DC motors.

• The speed of an induction motor is determined by the frequen...read more
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Q3. What is synchronisation
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Synchronisation is the process of coordinating multiple systems or devices to work together in harmony.
• Synchronisation ensures that different components or processes are aligned in time.

• It is commonly used in electrical systems to ensure that multiple generators are running in phase with each other.

• In data communication, synchronisation is important for ensuring that data is transmitted and received at the correct timi...read more
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Q4. What is the speed of a rotor with respect to the stator magnetic field in an induction motor?
Ans. 
The speed of a rotor with respect to the stator magnetic field in an induction motor is known as slip speed.
• The slip speed is the difference between the synchronous speed of the rotating magnetic field in the stator and the actual speed of the rotor.

• It is necessary for the rotor to operate at a speed slightly slower than the synchronous speed in order to induce current and generate torque.

• The slip speed allows the roto...read more
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Q5. What is slip? Per unit slip?
Ans. 
Slip is the difference between synchronous speed and actual rotor speed in an induction motor. Per unit slip is the slip expressed as a fraction of synchronous speed.
• Slip is the difference between synchronous speed (speed of the rotating magnetic field) and the actual rotor speed in an induction motor.

• Per unit slip is the slip expressed as a fraction of synchronous speed, typically denoted as a percentage.

• For example, ...read more
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Q1. Right hand rool .
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Q1. The Electrical technician job description entails participating in independent maintenance related training activities organized by the field operations teams and coordinating shutdowns to ensure that ...read more
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Q2. Commercial and Industrial Electrical Maintenance is the process of regularly inspecting, testing, cleaning, and repairing electrical systems and components to ensure they are safe and functioning Prope...read more
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Q3. The technician’s role also includes participating in planning, ensuring effective spare parts management, and supervising continuous project improvement.
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Q4. Electrical technicians perform various functions, depending on the particular operations of the company or organization they work with. However, their role is majorly to ensure effective repairs and mainte...read more
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12 th & Electricale Engineer Diploma

Q1. Working with the safety of all the colleagues working with you and your own safety.
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Q2. Be it any machinery or any part-time job, keep it safe.
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Q3. Doing the work as instructed by your senior.
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Conduct Theoretical Test.

Practical Test and group dissertation with electrical

Q1. What is the current and voltage difference?
Ans. 
Current is the flow of electric charge, measured in Amperes, while voltage is the force that drives the current, measured in Volts.
• Current is the rate of flow of electric charge in a circuit

• Voltage is the electrical potential difference that drives the current

• Current is measured in Amperes (A)

• Voltage is measured in Volts (V)

• Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance
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Q2. Types of motor ?
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Types of motors include AC motors, DC motors, synchronous motors, asynchronous motors, stepper motors, and servo motors.
• AC motors: Alternating current motors commonly used in household appliances and industrial applications.

• DC motors: Direct current motors used in applications where speed control is important.

• Synchronous motors: Maintain a constant speed and are used in applications like clocks and timers.

• Asynchronous ...read more
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Q3. AC or DC different?
Ans. 
AC and DC are two types of electrical current with different characteristics and applications.
• AC stands for alternating current, which periodically changes direction and magnitude.

• DC stands for direct current, which flows in one direction at a constant voltage.

• AC is commonly used in household appliances and power distribution systems.

• DC is often used in electronics, such as batteries and computer power supplies.
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Q1. What is the three-phase voltage?
Ans. 
Three-phase voltage is a type of electrical power transmission that utilizes three alternating currents.
• Three-phase voltage consists of three alternating currents that are 120 degrees out of phase with each other.

• It is commonly used in industrial and commercial applications for its efficiency and power distribution capabilities.

• The voltage levels for three-phase systems can vary depending on the application, with commo...read more
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Q2. What is the process for entering single-phase voltage?
Ans. 
The process for entering single-phase voltage involves connecting the voltage source to the load through a single conductor.
• Connect the single-phase voltage source to the load through a single conductor

• Ensure proper insulation and grounding for safety

• Check the voltage level using a multimeter before connecting the load

• Make sure the load is compatible with the voltage rating
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Q1. What is slip ring
Ans. 
A slip ring is an electrical component used to transfer power and electrical signals from a stationary to a rotating structure.
• Allows for continuous rotation without tangling wires

• Commonly used in electromechanical systems like motors, generators, and wind turbines

• Consists of stationary brushes and rotating conductive rings

• Helps in transmitting power, data, and signals across rotating interfaces
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Q2. What is oer unit slip
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Unit slip is the difference between synchronous speed and rotor speed in an induction motor.
• Unit slip is expressed as a fraction or percentage.

• It is used to calculate the rotor speed of an induction motor.

• Unit slip is necessary for determining the torque and efficiency of the motor.

• For example, if the synchronous speed of a motor is 1800 RPM and the rotor speed is 1750 RPM, the unit slip would be 0.0278 or 2.78%.
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Q1. Tell me about yourself
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Q2. What is your family background
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