Joyson Safety Systems Trainee Operating Engineer Interview Questions and Answers

Quants, logical reasoning, and verbal analogy require an understanding of basic concepts along with tips and tricks to effectively solve the questions.

Q1. What are bevel gears and what are their applications?
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Q2. Define 5 GD&T Symbols, What is difference between Parallism and Flateness
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Q3. How many microns are equivalent to 1 millimeter?
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Q4. What is FEA analysis, and what tools are available to perform it?
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Q1. Why do you want to work with us?
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Q2. What are your expectations regarding the position?
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Q3. How would you handle team members who have more experience than you if you are their team leader?
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Q1. What is the combustion chamber ,?
Ans. 
The combustion chamber is where fuel and air are mixed and burned in an internal combustion engine.
• It is a part of an internal combustion engine where the fuel-air mixture is ignited and burned.

• The combustion chamber is designed to contain and control the combustion process.

• It is typically located within the cylinder head of an engine.

• The shape and design of the combustion chamber can affect engine performance and effi
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Q2. Explain the refrigerant system?.
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Refrigerant system is a closed loop system that absorbs heat from a low-temperature area and releases it in a high-temperature area.
• Refrigerant circulates through the system to absorb and release heat

• Compressor increases the pressure of the refrigerant gas

• Condenser cools the refrigerant gas into a liquid

• Expansion valve reduces the pressure of the liquid refrigerant

• Evaporator absorbs heat from the surrounding area to co...read more
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General aptitude and technical questions from every engg field (mech,CS, Electrical,Electronics)
Need basic technical knowledge to crack

Group debate of 18-20 candidates with 9-10 in each team (in favour and against)

Topics related to Automobile industry or latest trends

18 candidates selected from 3 GDs

Q1. Family background
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Q2. Why Denso, what makes you eligible
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Q3. AC is an electrical appliance but sold in Electronics shop why so?
Ans. 
AC is sold in Electronics shops because it is an electrical appliance that utilizes electronic components for its operation.
• ACs use electronic components like capacitors, resistors, and microcontrollers for regulating temperature and controlling functions.

• Electronics shops specialize in selling a wide range of electronic devices, including appliances like ACs.

• ACs are considered as part of the electronics category due t...read more
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Q4. Any other recruitment filled ?
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Q1. How can you operate 4 different light bulbs under different trigger condition?
Ans. 
To operate 4 different light bulbs under different trigger conditions, use a combination of switches, timers, sensors, and programming.
• Use individual switches to control each light bulb independently.

• Set up timers to automatically turn on/off specific light bulbs at scheduled times.

• Utilize sensors such as motion sensors or light sensors to trigger certain light bulbs based on environmental conditions.

• Program a microcon...read more
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Q2. What is the process of cooling in AC
Ans. 
AC cooling process involves refrigerant absorbing heat from indoor air and releasing it outside.
• Refrigerant absorbs heat from indoor air through evaporator coils

• The warm refrigerant is then pumped to the condenser coils located outside

• Condenser coils release the heat absorbed from indoor air to the outside environment

• The refrigerant then goes back to the evaporator coils to repeat the cycle
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Q3. Basics of semiconductor devices (by japanese panelist)
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Q4. How can you make a transistor if semiconductor material is given to you (by japanese panelist)
Ans. 
To make a transistor, semiconductor material can be used to create a structure with three layers: emitter, base, and collector.
• Start by doping the semiconductor material with impurities to create the different layers.

• Use lithography and etching techniques to define the structure of the transistor.

• Add metal contacts to the different layers to allow for electrical connections.

• Test the transistor to ensure proper function...read more
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Q1. Self introduction
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Q2. As per experience questions
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Q1. Draw star-delta Diagram
Ans. 
Star-delta diagram is a method used to reduce starting current in induction motors.
• Star connection is used during starting to reduce current and then switches to delta connection for running.

• In star connection, each phase is connected to a common point called the neutral.

• In delta connection, each phase is connected in a loop.

• Example: L1, L2, L3 are connected to A, B, C respectively in star, then switched to form a delt
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4 sections of Mechanical, FM, Thermal, Manufacturing, Design

Q1. What is 5S? How will you apply?
Ans. 
5S is a workplace organization method that aims to improve efficiency and productivity by eliminating waste and optimizing workflow.
• Sort - separate necessary items from unnecessary ones

• Set in order - arrange necessary items in a logical and efficient manner

• Shine - clean and inspect the work area regularly

• Standardize - establish procedures and guidelines for maintaining the 5S system

• Sustain - ensure that the 5S system i...read more
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Q2. Which is more denser lead or aluminium?
Ans. 
Lead is more denser than aluminium.
• Density of lead is 11.34 g/cm³ while that of aluminium is 2.70 g/cm³

• Lead is commonly used in radiation shielding due to its high density

• Aluminium is commonly used in aircraft due to its low density
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