Roto Pumps Senior Engineer Mechanical Interview Questions and Answers

Q1. Asked related job profile
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Q1. Asked salary expectations
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Q1. Electrical Design Related
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Q1. Electrical power
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Q1. Market information , product specific
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Q2. Share Market details and competitor details, not about my present company
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Q1. What is jigs and fixtures, gcodes of cnc machines, drawing study, GD and T, Basic program for drilling and pcd calculations . hr is asked family background salary expectation job profile and duties and res...read more
Ans. 
Jigs and fixtures are tools used in manufacturing to hold and guide workpieces during machining processes.
• Jigs and fixtures are used to ensure accuracy and repeatability in machining operations.

• Gcodes are a standardized language used to control CNC machines.

• Drawing study involves analyzing technical drawings to understand dimensions, tolerances, and specifications.

• GD&T (Geometric Dimensioning and Tolerancing) is a syst...read more
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Q2. Different between jigs and fixtures
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Jigs are used to guide and control the cutting tool, while fixtures hold and locate the workpiece.
• Jigs are used for drilling, tapping, and reaming operations.

• Fixtures are used for milling, grinding, and turning operations.

• Jigs are often made of steel and are more complex than fixtures.

• Fixtures are often made of cast iron and are simpler than jigs.

• Jigs are used to ensure accuracy and repeatability in mass production.

• Fix...read more
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Q3. G code for drilling and tapping
Ans. 
G code for drilling and tapping is used in CNC machines to control the movement of the drill and tap.
• G81 is used for drilling

• G84 is used for tapping

• The code specifies the depth, speed, and position of the drill or tap

• The code is written in a specific format and must be entered correctly for the machine to execute the command
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Q4. Pcd calculations
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Q5. Pcd driiling program for fanuc control
Ans. 
PCD drilling program for Fanuc control is a computer program used for drilling operations.
• PCD drilling program is used for drilling operations on materials like aluminum, copper, and composite materials.

• It is designed to work with Fanuc control systems.

• The program uses PCD (polycrystalline diamond) tools for drilling.

• It can be customized to meet specific drilling requirements.

• The program can be used for both roughing a
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Q6. How to make counter holes, which cutter using for the operations
Ans. 
Counter holes can be made using a counterbore cutter or a countersink cutter depending on the application.
• Counterbore cutters are used to create a flat-bottomed hole with a larger diameter than the original hole.

• Countersink cutters are used to create a conical recess at the surface of the material.

• The choice of cutter depends on the size and depth of the hole required, as well as the material being worked on.

• It is impo...read more
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Technical objective questions for cnc machines and programming knowledge for drawing study

Plant manager interview

Q1. Salary discussion after you agree for your salary then go to medical.
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Q1. How will you set up a simulation for cavitation test in CFD?
Ans. 
Setting up a cavitation test simulation in CFD involves defining the fluid properties, boundary conditions, and meshing.
• Define the fluid properties such as density, viscosity, and vapor pressure.

• Set up appropriate boundary conditions to simulate the cavitation phenomenon.

• Generate a high-quality mesh to accurately capture the cavitation effects.

• Choose a suitable turbulence model to account for the turbulent flow behavio...read more
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Q2. What is the parameter that is monitored in a pumping station sump simulation?
Ans. 
The parameter monitored in a pumping station sump simulation is water level.
• Water level is monitored to ensure it stays within safe operating limits.

• Monitoring water level helps prevent overflow or equipment damage.

• Examples of monitoring methods include float switches, ultrasonic sensors, and pressure transducers.
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Q3. What turbulence model do you use for CFD of centrifugal pumps?
Ans. 
I typically use the k-epsilon turbulence model for CFD of centrifugal pumps.
• I prefer the k-epsilon turbulence model due to its accuracy in predicting turbulent flow behavior.

• This model is widely used in industrial applications and is well-suited for simulating flow in centrifugal pumps.

• The k-epsilon model calculates turbulent kinetic energy (k) and its dissipation rate (epsilon) to model turbulence effects.

• Other common...read more
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Q4. How will you setup aero-acoustic simulation?
Ans. 
To setup aero-acoustic simulation, one must first define the geometry, mesh the domain, set up boundary conditions, choose appropriate turbulence model, and select suitable solver settings.
• Define the geometry of the object or flow field being studied

• Mesh the domain to discretize the geometry into smaller elements

• Set up appropriate boundary conditions to mimic real-world scenarios

• Choose a suitable turbulence model to ca...read more
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Q5. What was the major difficulty faced by you during a centrifugal pump design? Walk us through your successful and unsuccessful pump design projects?
Ans. 
The major difficulty faced during a centrifugal pump design was achieving optimal efficiency and performance.
• One major difficulty was selecting the right impeller design to ensure proper flow and pressure.

• Another challenge was balancing the pump components to minimize vibration and noise.

• Successful project: Designed a centrifugal pump for a chemical processing plant that exceeded performance expectations.

• Unsuccessful p...read more
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Q1. What is real dom and virtual dom in react
Ans. 
Real DOM is the actual representation of the HTML structure, while Virtual DOM is a lightweight copy used for efficient updates.
• Real DOM is slower as it directly manipulates the HTML structure.

• Virtual DOM is faster as it updates the lightweight copy and then syncs with the real DOM.

• React uses the Virtual DOM to minimize unnecessary re-rendering of components.

• Virtual DOM allows for efficient batch updates, improving per...read more
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There were 6 questions to be solved. 3 average and 3 tough questions.

Q1. Concepts ask in interview Java Threads Exception Collections Spring boot annotations Git
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Q1. A general conversations, regarding my experience, project.
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Q1. Write unit testing for adding two nimbers
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Unit testing for adding two numbers
• Create a test case with two numbers and expected sum

• Call the function that adds two numbers

• Assert that the result matches the expected sum
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Q1. Explain challenge you faced in your last project
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Q1. Salary expectations
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