Jyoti CNC Automation Production Interview Questions and Answers

Q1. What do you know about bearing?
Ans. 
Bearings are mechanical components that reduce friction between moving parts.
• Bearings are used in various applications such as automobiles, industrial machinery, and household appliances.

• They come in different types such as ball bearings, roller bearings, and plain bearings.

• Proper lubrication is essential for the longevity and performance of bearings.

• Common bearing failures include overheating, contamination, and fatig...read more
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Q2. What is grinding process?
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Grinding process is a material removal process that uses an abrasive wheel to remove material from a workpiece.
• Grinding is used to achieve high dimensional accuracy and surface finish.

• It is commonly used in manufacturing processes for finishing and sharpening tools, as well as for shaping and smoothing metal or other materials.

• There are various types of grinding processes, including surface grinding, cylindrical grindi...read more
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Q3. What is abrasive and how it helps in grinding process
Ans. 
Abrasive is a material used for grinding, polishing, or cutting a workpiece.
• Abrasive particles remove material from the workpiece surface

• Common abrasives include diamond, aluminum oxide, and silicon carbide

• Abrasive grains are bonded to a wheel or belt for use in grinding machines

• Abrasive size and shape affect the grinding process and surface finish

• Coolants are often used to prevent overheating and improve surface quali
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Q4. What is the difference between single point and multipoint cutting tools
Ans. 
Single point cutting tools have only one cutting edge while multipoint cutting tools have multiple cutting edges.
• Single point tools are used for turning, boring, and shaping operations.

• Multipoint tools are used for milling, drilling, and grinding operations.

• Single point tools are easier to sharpen and maintain.

• Multipoint tools are more efficient for removing material quickly.

• Single point tools are typically made of hig...read more
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Q1. Hydraulic How Work
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Q2. Principle of Hydraulic
Ans. 
The principle of hydraulic is based on Pascal's law.
• Hydraulic systems use incompressible fluids to transmit force.

• According to Pascal's law, pressure applied to a fluid in a confined space is transmitted equally in all directions.

• Hydraulic systems are used in various applications such as car brakes, heavy machinery, and aircraft landing gear.

• The principle allows for the multiplication of force, as a small force applied...read more
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Q3. Hydraulics circuit diagram
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A hydraulic circuit diagram is a schematic representation of the flow of hydraulic fluid in a system.
• It shows the various components of the hydraulic system, such as pumps, valves, cylinders, and reservoirs.

• The diagram illustrates the direction of fluid flow, pressure levels, and the connections between different components.

• It helps in understanding the overall functioning of the hydraulic system and troubleshooting an...read more
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Q4. What is the torque definition
Ans. 
Torque is a measure of the force that can cause an object to rotate around an axis.
• Torque is the product of force and the distance from the axis of rotation.

• It is measured in units of force multiplied by distance, such as Newton-meters (Nm) or foot-pounds (ft-lb).

• Torque is responsible for rotational motion and can be increased by applying more force or increasing the distance from the axis of rotation.

• For example, when...read more
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Contains MCQ of 30 technical question and 30 aptitude

General topic

Q1. Questions from resume especially from Area of interest
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Q1. Tell me about yourself.
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Q1. Strength and weakness About company
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Q1. What is standard drill angle
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Simple Aptitude test

Around 10 people per group

Q1. Mostly Technical and from Resume
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Q1. More of "Fit for company" questions
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Q1. 7 types of qc tools
Ans. 
7 QC tools are used for quality control in manufacturing. They are simple and effective tools to identify and solve problems.
• Check sheets - used to collect data and analyze it

• Pareto charts - used to identify the most frequent problems

• Histograms - used to show the distribution of data

• Cause-and-effect diagrams - used to identify the root cause of a problem

• Flowcharts - used to show the steps in a process

• Control charts - u...read more
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Q2. What is FMEA,what are the 5s,cp vs cps different
Ans. 
FMEA is a risk assessment tool used to identify and mitigate potential failures. 5S is a workplace organization method. CP and CPS are statistical process control measures.
• FMEA stands for Failure Mode and Effects Analysis. It is a systematic approach to identifying and mitigating potential failures in a process or product.

• 5S is a workplace organization method that involves sorting, simplifying, sweeping, standardizing,...read more
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Q3. What is the ctq and ctc
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CTQ stands for Critical to Quality and CTC stands for Critical to Customer.
• CTQ is a measurable characteristic of a product or process that is important to the customer.

• CTC is a measurable characteristic of a product or process that directly impacts customer satisfaction.

• Identifying CTQs and CTCs helps in improving the quality of the product or process.

• Examples of CTQs and CTCs include product reliability, on-time deliv...read more
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Q4. What are the different gauges
Ans. 
Gauges are instruments used to measure various physical quantities. There are different types of gauges for different purposes.
• Pressure gauges measure pressure of fluids or gases

• Temperature gauges measure temperature of substances

• Thickness gauges measure thickness of materials

• Wire gauges measure diameter of wires

• Bore gauges measure diameter of holes

• Thread gauges measure pitch and diameter of screws

• Fuel gauges measure f
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Q5. What are the instrument handling
Ans. 
Instrument handling refers to the proper use, care, and maintenance of tools and equipment used in a particular field.
• Properly clean and sterilize instruments before and after use

• Handle instruments with care to prevent damage or contamination

• Store instruments in a safe and organized manner

• Regularly inspect instruments for wear and tear

• Follow manufacturer's instructions for use and maintenance

• Examples: surgical instrume
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Q6. Do you know the GD&T symbols
Ans. 
Yes, I am familiar with GD&T symbols.
• GD&T stands for Geometric Dimensioning and Tolerancing

• It is a system of symbols used to specify the dimensions and tolerances of a part

• Examples of symbols include concentricity, perpendicularity, and flatness
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Basic aptitude test that covers most aptitude topics.

GD round with general topics.

Q1. Technical round that covers basics of control valves.
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Q1. HR round consists of basic managerial questions.
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Q1. What is difference between RTD and thermocouple used
Ans. 
RTD measures temperature using resistance change, while thermocouple uses voltage change.
• RTD stands for Resistance Temperature Detector, while thermocouple generates voltage based on temperature difference.

• RTDs are more accurate and stable compared to thermocouples.

• RTDs have higher initial cost but lower long-term maintenance cost.

• Thermocouples are more rugged and can withstand higher temperatures than RTDs.

• Example: RT...read more
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Q2. What is the PLC and DCS system
Ans. 
PLC and DCS systems are control systems used in industrial automation to monitor and control processes.
• PLC stands for Programmable Logic Controller, used for controlling machinery and processes in manufacturing.

• DCS stands for Distributed Control System, used for controlling complex processes across multiple locations.

• PLCs are typically used for discrete control applications, while DCS systems are used for continuous co...read more
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Q3. What is the AC And DC drive
Ans. 
AC and DC drives are types of electrical drives used to control the speed and torque of electric motors.
• AC drive controls the speed of an AC motor by varying the frequency of the electrical supply.

• DC drive controls the speed of a DC motor by varying the voltage supplied to the motor.

• AC drives are more commonly used in industrial applications due to their efficiency and flexibility.

• DC drives are often used in applicatio...read more
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Q4. What do you understand by 4 wire and 2 wire
Ans. 
4 wire and 2 wire are configurations used in electrical circuits for measuring resistance.
• 4 wire configuration is used for accurate resistance measurements by eliminating lead resistance

• 2 wire configuration is simpler but less accurate due to lead resistance affecting measurements

• Examples: 4 wire used in precision instruments like multimeters, 2 wire used in basic circuit testing
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