Exova Interview Questions and Answers

Q1. 1) overhauling of maintenance. 2) what is the function of cooling tower.
Ans. 
A cooling tower is a device used to remove heat from a building or industrial process.
• The function of a cooling tower is to cool down water or other fluids by extracting heat from them.

• Cooling towers are commonly used in HVAC systems, power plants, and industrial processes.

• They work by evaporating a small portion of the water, which removes heat and cools down the remaining water.

• The cooled water is then circulated bac...read more
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Q2. How to dismental of boiler feed pump
Ans. 
To dismantle a boiler feed pump, follow these steps
• Isolate the pump from the power source and drain the water from the system

• Remove the coupling and motor from the pump

• Disconnect the suction and discharge piping from the pump

• Remove the bolts and nuts that hold the pump casing together

• Lift the casing off the pump and remove the impeller and shaft

• Inspect and clean all parts before reassembling or replacing
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Q1. Pellet plant maintenance work
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Q2. Pellet plant working procedure
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Pellet plant is a facility that transforms raw materials into pellets through a series of processes like grinding, drying, and compressing.
• Raw materials such as wood chips or sawdust are fed into the plant

• The raw materials are ground into a fine powder

• The powder is then dried to remove moisture

• The dried powder is compressed into pellets using a pellet press

• The pellets are cooled and screened to ensure quality

• The final ...read more
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Q3. Cooler car plate replacement work
Ans. 
Replacing cooler car plates involves removing old plates, cleaning the area, and installing new plates securely.
• Remove old cooler car plates carefully to avoid damaging surrounding components

• Clean the area thoroughly before installing new plates to ensure proper adhesion

• Securely install new cooler car plates to prevent any leaks or malfunctions
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Q4. Kil girth gear reverse process
Ans. 
The reverse process of kiln girth gear involves disassembling, inspecting, repairing, and reassembling the gear to ensure proper functioning.
• Disassemble the girth gear carefully to inspect for any damage or wear

• Repair or replace any worn or damaged components

• Reassemble the gear ensuring proper alignment and torque specifications

• Perform testing to ensure the gear functions correctly after reassembly
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Q1. Generic Questions
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Q2. About company and various other questions
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Q1. What is your family background?
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Q2. What are your salary expectations?
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Q3. Share details of your previous job.
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Q4. Why are you looking for a change?
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Q1. All questions related to foundry
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Q2. And machine shop and patterns making
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It consists of verbal and mathematical problems, with a duration of one and a half hours, which can be easily solved.

The moderate level of programming consists of multiple-choice questions (MCQs) and includes two programs focused on string and number operations.

1st round of interview was Aptitude test for 1 hr and topics were mostly logical analysis and quants

Topic was development of technology in India how it is going to affect

Q1. Define what is hooks law
Ans. 
Hook's law states that the force needed to extend or compress a spring by a certain distance is proportional to that distance.
• Force needed to extend or compress a spring is directly proportional to the displacement

• The formula for Hook's law is F = kx, where F is the force, k is the spring constant, and x is the displacement

• It is used to calculate the behavior of springs, elastic materials, and other systems under stres
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Q2. What is pearlite material
Ans. 
Pearlite is a two-phased lamellar structure composed of alternating layers of ferrite and cementite in carbon steel.
• Pearlite forms when austenite transforms during the cooling process of steel

• It is a common microstructure in carbon steels

• Pearlite provides strength and hardness to the steel

• It is often used in engineering applications for its desirable properties
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Q3. What is the composition of steel
Ans. 
Steel is primarily composed of iron and carbon, with small amounts of other elements like manganese, phosphorus, sulfur, and silicon.
• Steel is mainly made up of iron and carbon

• Carbon content typically ranges from 0.2% to 2.1%

• Other elements like manganese, phosphorus, sulfur, and silicon are also present in small amounts

• Alloying elements like nickel, chromium, and molybdenum can be added to enhance specific properties
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Q4. Tell me about yourself
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Q5. Which subject do you like most
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Physics,chem,math,quantitative apti.. etc

Q1. Can you work with team
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Q2. What is elctrolysis,what do you know how we can prepare aluminium
Ans. 
Electrolysis is a process of breaking down a compound using electricity. Aluminium can be prepared by electrolysis of alumina.
• Electrolysis involves passing an electric current through a compound to break it down into its constituent elements.

• Aluminium is prepared by electrolysis of alumina (Al2O3) dissolved in molten cryolite (Na3AlF6).

• The process involves the use of carbon electrodes, which react with the oxygen relea...read more
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Q3. Can you work at a temp 50 degree
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Basic Maths, Science & Gk

Indian economy - 10 min

Q1. Difference between vs Refrigeration
Ans. 
Air conditioning is the process of altering the properties of air to make it more comfortable, while refrigeration is the process of removing heat from a space or substance.
• Air conditioning is used to cool and dehumidify indoor air for comfort.

• Refrigeration is used to preserve food, medicine, and other perishable items.

• Air conditioning uses a refrigerant to absorb heat from indoor air and release it outside.

• Refrigerati...read more
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Q2. Thermodynamics cycle.
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Q3. Material properties and usage in the real world
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Material properties and usage are crucial in determining the performance and durability of products in the real world.
• Material properties such as strength, durability, and conductivity are important considerations in product design and development.

• Different materials have different properties and are suited for different applications. For example, steel is strong and durable, making it ideal for construction and manufa...read more
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Q4. Heat conduction vs Raidation
Ans. 
Heat conduction is the transfer of heat through a material, while radiation is the transfer of heat through electromagnetic waves.
• Heat conduction occurs in solids and liquids, while radiation can occur in vacuum or through transparent media.

• Heat conduction is slower than radiation.

• Examples of heat conduction include touching a hot stove or holding a warm cup of coffee, while examples of radiation include feeling the wa...read more
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Q1. Are you willing to relocate
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Q2. What is ur Expected CTC
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My expected CTC is in line with industry standards and commensurate with my experience and skills.
• My expected CTC is based on my current salary, industry standards, and the responsibilities of the role.

• I have researched the market and have a realistic expectation for my salary.

• I am open to negotiation based on the overall compensation package.

• I am looking for a fair and competitive salary that reflects my experience an...read more
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