Council of Scientific and Industrial Research Interview Questions and Answers

Q1. Tell me yourself
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PROFIT AND LOSS, AND OTHER SIMILAR CHAPTERS

Q1. NORMAL AND SIMPLE QUES
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Written Multiple choice questions from my own subject plus reasoning questions.

Q1. Small self Introductory session
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Q2. Botanical names of various plants and fruits, specially about regional ones.
Ans. 
Botanical names of plants and fruits are important for identification and classification purposes.
• Botanical name for apple is Malus domestica

• Botanical name for banana is Musa acuminata

• Botanical name for mango is Mangifera indica

• Botanical name for rose is Rosa

• Botanical name for tulsi is Ocimum tenuiflorum
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Q1. Tell me about yourself
Ans. Myself SUMIT HALDER, I LEAVE IN DURGAPUR, WEST BENGAL. I PASSED DIPLOMA IN MECHANICAL ENGINEERING AT 2017, NEXT I PASSED B.TECH IN MECHANICAL ENGINEERING AT 2022. I KNOW AUTOCAD MECHANICAL, BASIC COMPUTER, CATIA. I HAVE 08 MONTH EXPERIENCE AT CSIR-CMERI IN PROJECT ASSISTANT LEVEL 1.
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Q2. Why did you choose to study mechanical engineering?
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Q3. Without any reason I chose the mechanical engineering. Only when I enter the class I came to know that mechanical engineering have only boys. I am shocked. And I accept it. And recently they said that mos...read more
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Q4. What is 3D? Explain that.
Ans. 
3D refers to three-dimensional, which is a representation of objects or environments that have height, width, and depth.
• 3D is a term used to describe objects or environments that appear to have depth and dimension.

• It is a visual representation that adds depth to a flat surface, creating a more realistic and immersive experience.

• 3D can be achieved through various techniques such as stereoscopy, computer graphics, or hol...read more
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Q5. What are the different types of brakes?
Ans. 
There are several types of brakes including disc brakes, drum brakes, regenerative brakes, and hydraulic brakes.
• Disc brakes use calipers to squeeze brake pads against a disc rotor to slow down or stop the vehicle.

• Drum brakes use brake shoes that press against the inside of a drum to create friction and slow down or stop the vehicle.

• Regenerative brakes convert the kinetic energy of the vehicle into electrical energy, wh...read more
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Q6. What is called engineering drawing?
Ans. 
Engineering drawing is a visual representation of an object or structure, created using technical drawing techniques.
• Engineering drawing is used to communicate design and manufacturing information.

• It includes details such as dimensions, materials, and assembly instructions.

• Common types of engineering drawings include mechanical, electrical, and architectural drawings.

• Engineering drawings are typically created using CAD...read more
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Q7. What are the different types of gate valves?
Ans. 
Gate valves are used to control the flow of fluids by opening or closing a gate. There are several types of gate valves.
• Rising stem gate valve

• Non-rising stem gate valve

• Wedge gate valve

• Parallel gate valve

• Knife gate valve

• Slab gate valve
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Q8. What are the two types of cooling towers?
Ans. 
The two types of cooling towers are natural draft cooling towers and mechanical draft cooling towers.
• Natural draft cooling towers use natural air circulation to cool the water, with no mechanical fans.

• Mechanical draft cooling towers use mechanical fans to circulate air and cool the water.

• Examples of natural draft cooling towers include hyperbolic cooling towers, while examples of mechanical draft cooling towers include...read more
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Q9. What are the vital conditions of a perfect gas?
Ans. 
A perfect gas is an idealized model of a gas that meets certain conditions.
• The gas consists of a large number of tiny particles that are in constant random motion.

• The particles are assumed to have no volume.

• The particles do not interact with each other except through perfectly elastic collisions.

• The gas is assumed to be in a closed container.

• The temperature, pressure, and volume of the gas are related by the ideal gas ...read more
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Q10. The vital conditions of a perfect gas are: It needs to satisfy the state equation. The specific heat should remain constant.
Ans. 
The vital conditions of a perfect gas are state equation and constant specific heat.
• Perfect gas must satisfy state equation

• Specific heat should remain constant

• Examples: Ideal gas, real gas at low pressure and high temperature
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Q11. What do you mean by torque?
Ans. 
Torque is a measure of the twisting force that causes rotation.
• Torque is a vector quantity, meaning it has both magnitude and direction.

• It is calculated by multiplying the force applied by the distance from the axis of rotation.

• Units of torque are typically expressed in Newton-meters (Nm) or pound-feet (lb-ft).

• Examples of torque include the force applied by a wrench to tighten a bolt or the rotational force of an engin...read more
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Q12. Torque is the measure of force needed to rotate an object.
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Q13. Why is Nitrogen used in welding? Which gases can be used in welding instead of nitrogen?
Ans. 
Nitrogen is used in welding to prevent oxidation and improve weld quality.
• Nitrogen is an inert gas that does not react with the metal being welded, preventing oxidation and contamination.

• It creates a protective atmosphere around the weld, reducing the risk of defects and improving the overall quality.

• Nitrogen can be used in various welding processes such as TIG (tungsten inert gas) and laser welding.

• Other gases that ca...read more
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Q14. What is the mechanical advantage of a double pulley?
Ans. 
The mechanical advantage of a double pulley is the ratio of the output force to the input force.
• A double pulley has two grooved wheels, allowing a rope or cable to pass through.

• The mechanical advantage is determined by the number of supporting ropes or cables.

• With a double pulley, the mechanical advantage is equal to the number of supporting ropes or cables.

• For example, if there are two supporting ropes, the mechanical...read more
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Q15. What is a universal coupling?
Ans. 
A universal coupling is a mechanical device that connects two rotating shafts allowing them to move in any direction.
• It is also known as a universal joint or U-joint.

• It is commonly used in automobiles to connect the drive shaft to the transmission.

• It allows for the transmission of power between two shafts that are not in a straight line.

• It consists of a cross-shaped component with four bearings that allow for movement ...read more
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Q16. A universal coupling is a pair of hinges connected by a cross shaft. The shaft is used to connect two shafts with axes inclined to each other.
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Q17. What is a disadvantage of supercritical boilers?
Ans. 
One disadvantage of supercritical boilers is their high cost.
• Supercritical boilers are expensive to manufacture and install.

• They require high-quality materials to withstand high pressures and temperatures.

• Maintenance and repair costs for supercritical boilers are also high.

• Supercritical boilers may have limited flexibility in terms of load changes.

• They require a longer startup time compared to subcritical boilers.
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Q18. What type of computer programs does a mechanical engineer use?
Ans. 
Mechanical engineers use various computer programs for design, simulation, and analysis.
• CAD software for designing and modeling mechanical components and systems

• Finite element analysis (FEA) software for simulating and analyzing stresses and deformations in mechanical structures

• Computational fluid dynamics (CFD) software for analyzing fluid flow and heat transfer in mechanical systems

• Programming languages such as MATLA...read more
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Q19. A mechanical engineer uses software like SolidWorks, Autodesk AutoCAD, and CATIA
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Q1. Which of the following is not an adhesion protien?
Ans. Laminin was not, out of other options given
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Q2. Which of the following is an endgred spicies of Russian Far East
Ans. 
The endgred species of Russian Far East is the Amur leopard.
• The Amur leopard is a critically endangered species found in the Russian Far East.

• It is one of the rarest big cats in the world, with a population of less than 100 individuals.

• The Amur leopard is known for its beautiful coat, which features rosette-shaped spots.

• Its habitat is primarily in the temperate forests of eastern Russia, near the border with China and ...read more
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Basic aptitude tests

Q1. What drew you to this role?
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