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APL Apollo Tubes Mechanical Maintenance Engineer Interview Questions and Answers
8 Interview questions
Pickling process is a metal surface treatment method to remove impurities and improve corrosion resistance.
Pickling is a chemical process used to remove impurities like stains, rust, and scale from metal surfaces.
It involves immersing the metal in an acidic solution, such as hydrochloric acid or sulfuric acid.
The process helps to improve the metal's corrosion resistance and prepare it for further treatments like p...
Types of loading on bearings include radial load, axial load, and moment load.
Radial load: Load acting perpendicular to the axis of rotation.
Axial load: Load acting parallel to the axis of rotation.
Moment load: Load causing bending or twisting of the bearing.
Combination loading: Bearings may experience a combination of radial, axial, and moment loads.
Examples: Radial load on a wheel bearing, axial load on a thrust...
Centrifugal pumps work by converting mechanical energy from a motor into kinetic energy to move fluid through the pump.
Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.
The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.
Centrifugal pumps are commo...
In cold rolling mill process, the structure of steel is altered through compression and deformation.
Cold rolling reduces the thickness of steel by compressing it between rollers
This process increases the strength and hardness of the steel
Grain structure of the steel becomes elongated and aligned in the direction of rolling
Cold rolling can also improve the surface finish and dimensional accuracy of the steel
Example...
Various types of cranes are used in mechanical maintenance, including overhead cranes, gantry cranes, jib cranes, and mobile cranes.
Overhead cranes are commonly used in industrial settings for lifting and moving heavy loads.
Gantry cranes are used in shipyards and construction sites for lifting and moving large objects.
Jib cranes are often used in workshops and warehouses for precise lifting and positioning of mate...
The tube mill shaft should undergo heat treatment to improve its strength and durability.
The most common heat treatment for tube mill shafts is quenching and tempering.
Quenching involves heating the shaft to a high temperature and then rapidly cooling it in water or oil to increase its hardness.
Tempering is done after quenching to reduce the brittleness caused by the rapid cooling process.
Other heat treatment meth...
Gear box ratio determines the relationship between input and output speeds, while output power is the amount of work done per unit of time.
Gear box ratio is the ratio of the number of teeth on the input gear to the number of teeth on the output gear.
Output power is the product of the force applied and the distance over which the force is applied per unit of time.
For example, if a gear box has a ratio of 2:1 and th...
Tube mill rolls are typically made of high-quality alloy steel or tool steel, with varying root diameters depending on the specific application.
Tube mill rolls are commonly made of materials such as high-quality alloy steel or tool steel for durability and wear resistance.
The root diameter of tube mill rolls can vary depending on the specific requirements of the milling process.
Examples of tube mill roll materials...
APL Apollo Tubes Mechanical Maintenance Engineer Interview Experiences
1 interview found
(8 Questions)
- Q1. What are type of crane used
- Ans.
Various types of cranes are used in mechanical maintenance, including overhead cranes, gantry cranes, jib cranes, and mobile cranes.
Overhead cranes are commonly used in industrial settings for lifting and moving heavy loads.
Gantry cranes are used in shipyards and construction sites for lifting and moving large objects.
Jib cranes are often used in workshops and warehouses for precise lifting and positioning of materials...
- Q2. What are type of loading on bearing
- Ans.
Types of loading on bearings include radial load, axial load, and moment load.
Radial load: Load acting perpendicular to the axis of rotation.
Axial load: Load acting parallel to the axis of rotation.
Moment load: Load causing bending or twisting of the bearing.
Combination loading: Bearings may experience a combination of radial, axial, and moment loads.
Examples: Radial load on a wheel bearing, axial load on a thrust bear...
- Q3. What type of heat treatment to be done on tube mill shaft
- Ans.
The tube mill shaft should undergo heat treatment to improve its strength and durability.
The most common heat treatment for tube mill shafts is quenching and tempering.
Quenching involves heating the shaft to a high temperature and then rapidly cooling it in water or oil to increase its hardness.
Tempering is done after quenching to reduce the brittleness caused by the rapid cooling process.
Other heat treatment methods l...
- Q4. What do you understand by Pickling process
- Ans.
Pickling process is a metal surface treatment method to remove impurities and improve corrosion resistance.
Pickling is a chemical process used to remove impurities like stains, rust, and scale from metal surfaces.
It involves immersing the metal in an acidic solution, such as hydrochloric acid or sulfuric acid.
The process helps to improve the metal's corrosion resistance and prepare it for further treatments like painti...
- Q5. What happen in cold rolling mill process to structure of steel
- Ans.
In cold rolling mill process, the structure of steel is altered through compression and deformation.
Cold rolling reduces the thickness of steel by compressing it between rollers
This process increases the strength and hardness of the steel
Grain structure of the steel becomes elongated and aligned in the direction of rolling
Cold rolling can also improve the surface finish and dimensional accuracy of the steel
Examples: Co...
- Q6. How Centrifugal pump work
- Ans.
Centrifugal pumps work by converting mechanical energy from a motor into kinetic energy to move fluid through the pump.
Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.
The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.
Centrifugal pumps are commonly u...
- Q7. Tube mill roll materail and their root dia
- Ans.
Tube mill rolls are typically made of high-quality alloy steel or tool steel, with varying root diameters depending on the specific application.
Tube mill rolls are commonly made of materials such as high-quality alloy steel or tool steel for durability and wear resistance.
The root diameter of tube mill rolls can vary depending on the specific requirements of the milling process.
Examples of tube mill roll materials incl...
- Q8. Gear box ratio and output power
- Ans.
Gear box ratio determines the relationship between input and output speeds, while output power is the amount of work done per unit of time.
Gear box ratio is the ratio of the number of teeth on the input gear to the number of teeth on the output gear.
Output power is the product of the force applied and the distance over which the force is applied per unit of time.
For example, if a gear box has a ratio of 2:1 and the inp...
Skills evaluated in this interview
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Interview questions from similar companies
Selected
I applied via Referral and was interviewed before Feb 2022. There were 3 interview rounds.
General questions from graduation subjects & questions from Quantitative aptitude. Overall paper difficulty was at medium level.
(6 Questions)
- Q1. Introduce yourself. Different types of measuring instruments & their applications, least count.
- Q2. Project details done in graduation last semester.
- Q3. Applications of measuring instruments.
- Ans.
Measuring instruments are used in various applications to accurately measure physical quantities.
Quality control in manufacturing processes
Monitoring and controlling environmental conditions
Testing and calibration of equipment
Research and development
Process optimization and efficiency improvement
Data collection and analysis
Safety and hazard detection
Medical diagnostics and patient monitoring
- Q4. Different types of castings & their uses.
- Ans.
Different types of castings & their uses
Sand casting: used for large and complex shapes like engine blocks
Investment casting: used for intricate and detailed parts like jewelry
Die casting: used for high-volume production of small to medium-sized parts like car components
Centrifugal casting: used for cylindrical shapes like pipes and tubes
Continuous casting: used for producing long and continuous shapes like steel bille...
- Q5. Manufacturing processes & their applications.
- Ans.
Manufacturing processes are techniques used to transform raw materials into finished products.
Casting: pouring molten metal into a mold to create a solid object (e.g. automotive engine blocks)
Machining: removing material from a workpiece using cutting tools (e.g. CNC milling)
Forming: shaping materials through deformation (e.g. sheet metal bending)
Joining: combining multiple parts into a single entity (e.g. welding)
Addi...
- Q6. Difference between first and third angle projection in mechanical drawings.
- Ans.
First angle projection and third angle projection are two different methods used in mechanical drawings to represent a 3D object on a 2D plane.
First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.
In first angle projection, the object is placed in the first quadrant and the views are projected onto the planes surrounding the object.
In third angle proj...
Interview Preparation Tips
- Manufacturing processes
Production Engineer Interview Questions & Answers
Steel Authority Of India
Haresh k panchal
posted on 4 Jul 2023
Selected
I applied via Company Website and was interviewed in Nov 2022. There were 2 interview rounds.
(5 Questions)
- Q1. Shaft daimeter 40 mm wy bearings no
- Q2. Ferro silicon melting point wy
- Ans.
Ferro silicon has a melting point around 1200-1300°C, influenced by its silicon content and alloying elements.
Ferro silicon is an alloy of iron and silicon, primarily used in steelmaking.
The melting point varies based on silicon content; higher silicon leads to lower melting points.
Typical applications include deoxidizing agents in steel production.
For example, ferro silicon with 75% silicon has a melting point around ...
- Q3. Which composition is a ci casting
- Ans.
CI casting refers to cast iron casting, which is made from a composition of iron, carbon, and silicon.
CI casting stands for cast iron casting.
It is made from a composition of iron, carbon, and silicon.
The carbon content in CI casting is typically between 2.1% and 4%.
The silicon content in CI casting is typically between 1% and 3%.
CI casting is known for its excellent castability, good machinability, and high wear resis...
- Q4. High crome metal pouring temperature
- Ans.
The pouring temperature of high chrome metal is typically between 1,600 to 1,800 degrees Celsius.
High chrome metal is commonly used in applications that require high temperature resistance and corrosion resistance.
The pouring temperature is crucial to ensure proper flow and solidification of the metal.
The specific pouring temperature may vary depending on the exact composition of the high chrome metal and the desired p...
- Q5. Maild steel campotion
Production Engineer Interview Questions & Answers
Jai Balaji Group
Sumit Chakraborty
posted on 5 Apr 2025
Selected
I appeared for an interview before Apr 2024, where I was asked the following questions.
- Q1. About project in college
- Q2. Industrial training
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Jul 2022. There was 1 interview round.
(2 Questions)
- Q1. Kazan in the deppt. And Regular work maximum out put
- Q2. Hard working. Falxable processing
Interview Preparation Tips
Production Engineer Interview Questions & Answers
Jindal Stainless
SWARUP DUTTA
posted on 23 Apr 2025
Selected
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Job responsibilities
- Q2. You are interested
- Q3. What is your job role
I applied via Campus Placement and was interviewed before Jul 2023. There were 3 interview rounds.
Logical reasoning and general knowledge
Current affairs and general affairs
(2 Questions)
- Q1. Related to the core subject
- Q2. Related to matarials
Interview Preparation Tips
Selected
I applied via Recruitment Consulltant and was interviewed in Sep 2024. There were 2 interview rounds.
(2 Questions)
- Q1. What is stainless steel ?
- Ans.
Stainless steel is a corrosion-resistant alloy made of iron, chromium, nickel, and other elements.
Stainless steel is known for its resistance to corrosion, rust, and staining.
It is commonly used in various industries such as construction, automotive, and food processing.
There are different grades of stainless steel, each with varying levels of corrosion resistance and strength.
Examples of stainless steel applications i...
- Q2. Why annealing we needed?
- Ans.
Annealing is needed to relieve internal stresses, improve ductility, and soften the material for further processing.
Annealing helps to remove internal stresses in the material, making it more ductile and less prone to cracking.
It also helps to soften the material, making it easier to shape or machine.
Annealing can improve the microstructure of the material, leading to better mechanical properties.
Examples of materials ...
Discussed on my jobs profile
Interview Preparation Tips
- Steel making and production plan
Skills evaluated in this interview
Selected
I applied via Campus Placement
Test contains reasoning , maths and few questions related to mechanical engineering
(2 Questions)
- Q1. This is a technical round in which we had interact with the senior officer of related department
- Q2. Iron carbon diagram, material properties, college project, forging process
(2 Questions)
- Q1. Name and biodata
- Ans.
My name is John Doe, a Production Engineer with 5 years of experience in manufacturing industry.
Name: John Doe
Experience: 5 years in manufacturing industry
Role: Production Engineer
- Q2. Technical and experience
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