JBM Group Graduate Engineer Trainee (Get) Interview Questions and Answers

Q1. What is stress and strain?
Ans. 
Stress is the force applied to a material, while strain is the resulting deformation or change in shape.
• Stress is the external force acting on an object, measured in units like Newtons per square meter (N/m^2) or Pascals (Pa).

• Strain is the measure of deformation or change in shape of a material due to stress, expressed as a ratio or percentage.

• Example: When you stretch a rubber band (apply stress), it elongates (strain...read more
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Basic quantitative aptitude, English, and reasoning skills are essential; quick solving abilities are necessary due to the limited time available, making both speed and accuracy important factors.

Q1. What's your favourite subject in engineering?
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Q2. What is heat treatment processes? Explain in brief.
Ans. 
Heat treatment processes involve heating and cooling metals to alter their properties.
• Heat treatment processes involve heating metals to specific temperatures and then cooling them at controlled rates.

• Common heat treatment processes include annealing, tempering, quenching, and normalizing.

• These processes can change the hardness, strength, toughness, and other properties of metals.

• For example, quenching involves rapid c...read more
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Q3. Tell me about surface tension ?
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Surface tension is the property of a liquid that allows it to resist an external force due to the cohesive nature of its molecules.
• Surface tension is caused by the attraction between the molecules of a liquid, which creates a 'skin' on the surface of the liquid.

• It is responsible for phenomena like capillary action, where liquids rise in narrow tubes against the force of gravity.

• Surface tension can be observed in everyd...read more
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Q4. Difference between mass and weight?
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Mass is the amount of matter in an object, while weight is the force of gravity acting on an object.
• Mass is a scalar quantity and is measured in kilograms or grams.

• Weight is a vector quantity and is measured in newtons.

• Mass remains constant regardless of location, while weight changes depending on the gravitational pull.

• For example, a person with a mass of 70 kg will have a weight of approximately 686 newtons on Earth,...read more
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Q5. Modes of heat transfer ?
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Modes of heat transfer include conduction, convection, and radiation.
• Conduction: Heat transfer through direct contact between particles. Example: Touching a hot stove.

• Convection: Heat transfer through the movement of fluids (liquids or gases). Example: Boiling water.

• Radiation: Heat transfer through electromagnetic waves. Example: Feeling the warmth of the sun.
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Q1. Tell me something about yourself ?
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Q2. What were your roles and responsibilities as a member of the PD Club in your institute?
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Q3. What motivates you to join our organization?
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Q4. What is your understanding of our organization?
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In the aptitude round only 30 minutes provided by company to solve 80 questions.
Maths - 30 questions
Reasoning - 30 question
English -20 questions
There is no negative marking.

Q1. I have done b.tech mechanical engineering so interviewer asked technical questions related to - Welding, iron carbon diagram,mohar circle, stress - strain curvee, ic engine process , Carnot cycle , swept v...read more
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Q1. Project related questions in deeply.
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Q1. General questions like strength, relocate, shifts timings, accommodations.....
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Q1. Self your introduction
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Q2. Electrical vehicles, what is chassis
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Q3. What is automobile, what is otto ,dual,diesels cycle difference
Ans. 
The question is about the basics of automobile engines and the differences between Otto, Dual, and Diesel cycles.
• Automobile is a vehicle powered by an engine that converts fuel into mechanical energy.

• Otto cycle is a four-stroke combustion cycle used in gasoline engines.

• Dual cycle is a modified version of the Otto cycle that includes a constant volume heat addition process.

• Diesel cycle is a four-stroke combustion cycle ...read more
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Q4. What is coefficient of performance input/output
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Coefficient of performance (COP) is the ratio of output heat to input work or energy.
• COP is used to measure the efficiency of a heat pump or refrigeration system.

• It is calculated by dividing the output heat by the input work or energy.

• A higher COP indicates a more efficient system.

• For example, a heat pump with a COP of 3 can produce three units of heat for every unit of energy input.

• COP can also be expressed in terms o...read more
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Q5. How the otto cycle constants volume this process,
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The Otto cycle is a constant volume process used in internal combustion engines.
• The Otto cycle consists of four processes: intake, compression, combustion, and exhaust.

• During the intake process, the fuel-air mixture is drawn into the cylinder.

• During the compression process, the mixture is compressed to a smaller volume, increasing its temperature and pressure.

• During the combustion process, the mixture is ignited, causi...read more
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Q6. What is the Duel cycle principles -both constant volume, and pressure
Ans. 
Dual cycle principles involve both constant volume and pressure processes in an engine cycle.
• Dual cycle is a combination of Otto and Diesel cycles.

• It involves two constant volume and one constant pressure processes.

• The first constant volume process is isentropic compression.

• The constant pressure process is combustion.

• The second constant volume process is isentropic expansion.

• It is used in gas turbine engines and some i...read more
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Q7. Physical quantities length ,mass time
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Q8. Efficiency of carnot T1/T2-T1
Ans. 
Efficiency of Carnot cycle is given by T1/T2-T1
• Efficiency of Carnot cycle is the maximum possible efficiency of a heat engine

• It depends only on the temperatures of the hot and cold reservoirs

• Efficiency = 1 - (T1/T2)

• T1 is the temperature of the cold reservoir and T2 is the temperature of the hot reservoir
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