Rashmi Group Diploma Engineer Trainee - DET Interview Questions and Answers

Q1. Avery thing in you subject
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Q2. All subjects in your branch topic
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Basic math and reasoning questions

Q1. About CAD what is type of drawing and command use off machine design
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Q2. About your self and family
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Q3. About your education and quality
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Q1. Tell me about yourself.
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Q1. What are your salary expectations?
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Q1. What is your family background?
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Q1. Junior engineering mechanical JE
Ans. The standard of the questions in Engineering subjects will be approximately of the level of Diploma in Engineering (Civil/ Electrical/ Mechanical/Electronics) from a recognized Institute, Board or University recognized by All India Board of Technical Education. All the questions will be set in SI units. The details of the syllabus are given below: Paper-I (i) General Intelligence & Reasoning: The Syllabus for Gener...read more
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Q2. Assistant manager
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Q3. Incharge assistant
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Q4. Mechanical Engineering suparvisor
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Q1. What is turbine
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A turbine is a machine that converts the energy from a fluid flow into mechanical energy.
• Turbines are commonly used in power plants to generate electricity from steam or water flow.

• There are different types of turbines such as steam turbines, gas turbines, and water turbines.

• Turbines have blades that are rotated by the fluid flow, causing a shaft to spin and generate power.

• The mechanical energy produced by turbines can
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Q2. What is blast furnace
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A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.
• Used for smelting iron ores to produce iron

• Consists of a furnace chamber with a stack and tuyeres

• Operates at high temperatures using coke as fuel

• Produces molten iron and slag as byproducts
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Q3. What is transformer
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A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two coils of wire, known as primary and secondary coils

• Primary coil is connected to a power source, while secondary coil is connected to the load

• Works on the principle of electromagnetic induction to change voltage levels

• Used to step up or step down voltage levels in electrical systems

• Ex...read more
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Q4. Types of transformer
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Types of transformers include step-up, step-down, isolation, autotransformer, and distribution transformers.
• Step-up transformer increases voltage levels

• Step-down transformer decreases voltage levels

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps for different voltage levels

• Distribution transformer is used to supply power t
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Q5. Working principle of Transformers
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Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers have two coils of wire, known as primary and secondary coils, which are wound around a core made of ferromagnetic material.

• When an alternating current flows through the primary coil, it creates a changing magnetic field around the coil.

• This changing magnetic field induces a voltage in ...read more
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Q6. What is resistance
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Resistance is the opposition to the flow of electric current in a material.
• Resistance is measured in ohms (Ω).

• It is caused by collisions between electrons and atoms in a material.

• Materials with high resistance are insulators, while materials with low resistance are conductors.

• Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.
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Q7. What is diode types of diode
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Diodes are electronic components that allow current to flow in one direction only. Common types include PN junction diodes, Zener diodes, Schottky diodes, and light-emitting diodes (LEDs).
• PN junction diodes: Basic diodes that allow current to flow in one direction only.

• Zener diodes: Diodes that operate in the reverse breakdown region and are used for voltage regulation.

• Schottky diodes: Diodes with a lower forward volta...read more
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Q8. What is power factor
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Power factor is a measure of how effectively electrical power is being used in a circuit.
• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit.

• It indicates how efficiently power is being converted into useful work.

• A power factor of 1 (or 100%) means all the power is being used effectively, while a power factor of 0 means none of the power is being used efficiently.

• Power factor ca...read more
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Q9. What is DC motor
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A DC motor is a type of electric motor that runs on direct current electricity, converting electrical energy into mechanical energy.
• DC motors have a rotating armature and a stationary field magnet

• They operate based on the principle of Lorentz force

• Common types include brushed and brushless DC motors

• DC motors are widely used in various applications such as robotics, electric vehicles, and industrial machinery
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Q10. Difference between AC and DC motor
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AC motors use alternating current and are more commonly used for industrial applications, while DC motors use direct current and are often used in household appliances.
• AC motors use alternating current, while DC motors use direct current

• AC motors are more commonly used in industrial applications, while DC motors are often used in household appliances

• AC motors are generally more efficient and require less maintenance co...read more
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Q11. What is electromagnetic field
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An electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.
• Consists of electric and magnetic components

• Generated by electric charges and currents

• Can be static or dynamic

• Used in various applications such as wireless communication and MRI machines
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Q12. Types of motor and working principles
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Types of motors include DC motors, AC motors, synchronous motors, and induction motors. Each type operates based on different principles.
• DC motors operate using direct current and have a commutator to switch the current direction, examples include brushed and brushless DC motors.

• AC motors operate using alternating current and include types like synchronous motors and induction motors.

• Synchronous motors rotate at a cons...read more
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Q13. What is V F D
Ans. 
VFD stands for Variable Frequency Drive, a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.
• VFDs are used to control the speed and torque of AC motors in various applications.

• They are commonly used in HVAC systems, industrial pumps, fans, and conveyor systems.

• VFDs can improve energy efficiency by matching the motor speed to the actual load requirements.

• Th...read more
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Q14. What is earthing
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Earthing is the process of connecting electrical equipment to the earth to prevent electric shocks and ensure safety.
• Earthing provides a path for fault currents to flow safely into the ground.

• It helps in protecting equipment and individuals from electrical faults.

• Earthing reduces the risk of fire hazards in electrical systems.

• Types of earthing include plate earthing, pipe earthing, and rod earthing.

• Proper earthing is e...read more
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Q15. Types of motor and working principle
Ans. 
Types of motors include DC motors, AC motors (induction, synchronous), stepper motors, and servo motors. Each type operates based on different principles.
• DC motors operate on the principle of Lorentz force, where a current-carrying conductor experiences a force in a magnetic field.

• AC induction motors work on the principle of electromagnetic induction, where a rotating magnetic field induces current in the rotor.

• AC sync...read more
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Q16. What is contactor
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A contactor is an electrical device used to switch an electrical circuit on or off.
• Contactor is typically used in applications where high current needs to be controlled, such as in industrial machinery.

• It consists of a coil which when energized creates a magnetic field that pulls in a set of contacts to make or break the circuit.

• Contactor can be controlled manually or automatically through a control system.

• Common examp...read more
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Q17. What is cooking and crawling
Ans. 
Cooking and crawling are terms used in electrical engineering to describe the movement of a circuit breaker's contacts.
• Cooking refers to the slow separation of the contacts when the circuit breaker is opened under load.

• Crawling refers to the movement of the contacts due to the presence of small currents even when the circuit breaker is in the closed position.
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Q1. AC current kya hai
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Q2. DC current kya hai
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Q3. DC current direct current hai
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Q4. DC direct current hai
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Q5. AC alternator current hai
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Apptitude test is in medium class it is normally passed normally bya average students .

Q1. Iinterview is all about good if you know about your branch subject average knowladge than you got the chance of selection . It also ask you about your training period question that you have learnt in train...read more
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Q2. About 2 or 4 stroke engine
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Q3. All the laws of thermodynamics and haet transfer in thermal engineering .
Ans. 
Thermodynamics and heat transfer are fundamental principles in thermal engineering, governing energy transfer and conversion.
• First law of thermodynamics: Conservation of energy, stating that energy cannot be created or destroyed, only transferred or converted.

• Second law of thermodynamics: Entropy always increases in a closed system, leading to the direction of heat flow.

• Third law of thermodynamics: As temperature appro...read more
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Q4. All the mechanical properties in som .
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Mechanical properties in materials refer to characteristics related to their behavior under applied forces.
• Mechanical properties include strength, hardness, toughness, ductility, and elasticity.

• Strength is the ability of a material to withstand an applied force without failure.

• Hardness is the resistance of a material to deformation or scratching.

• Toughness is the ability of a material to absorb energy and plastically de...read more
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Q5. All the process in RAC .
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RAC stands for Refrigeration and Air Conditioning. It involves various processes like compression, condensation, expansion, and evaporation.
• Compression: The refrigerant gas is compressed to increase its temperature and pressure.

• Condensation: The high-pressure gas releases heat and condenses into a liquid.

• Expansion: The liquid refrigerant passes through an expansion valve, reducing its pressure and temperature.

• Evaporati...read more
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Q1. What is the heat treatment
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Heat treatment is a process used to alter the physical and sometimes chemical properties of a material through controlled heating and cooling.
• Heat treatment involves heating a material to a specific temperature, holding it at that temperature for a certain amount of time, and then cooling it at a controlled rate.

• The purpose of heat treatment is to improve the material's hardness, strength, toughness, ductility, and oth...read more
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Q1. What is the magnetic particle test procedure
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Magnetic particle test is a non-destructive testing method used to detect surface and near-surface flaws in ferromagnetic materials.
• The test involves magnetizing the component, applying magnetic particles to the surface, and inspecting for indications of defects.

• Defects such as cracks, laps, seams, and inclusions can be detected using this method.

• The test can be performed using either dry magnetic powder or wet fluores...read more
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