Tata Hitachi Construction Machinery Senior Mechanical Technician Interview Questions and Answers

Q1. Family background
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Q2. Tell me about yourself
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Q3. What's your salary expectation
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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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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?
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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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Solar field presentation

Q1. Right hand rool .
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Q2. Left hand rool
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Electrical department all Technical questions and General averness questions in MCQ type

Q1. Electrical all Technical questions
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Q2. 1.Types of Transformer 2.Types of Electrical Drives 3. What is the frequence of India 4. What is your goal
Ans. 
Types of transformers include power transformers, distribution transformers, instrument transformers. Types of electrical drives include AC drives, DC drives, servo drives.
• Power transformers are used in high voltage transmission and distribution systems.

• Distribution transformers are used to step down voltage for use in homes and businesses.

• Instrument transformers are used for measuring voltage and current in power syst...read more
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Q1. 1. Tell me about yourself 2. What is your greatest strength 3. Why do you want to work here 4. Why should we choose you
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Q1. Department for job experience and introduction, Technical question??
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Q1. Hr interview? So many work station and plant question???
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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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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?
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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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