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Vacuum pumps are devices that remove gas molecules from a sealed volume to create a partial vacuum.
Positive displacement pumps (rotary vane, piston, diaphragm)
Momentum transfer pumps (turbomolecular, molecular drag)
Entrapment pumps (cryogenic, ion, getter)
Mechanical seals are of two types - balanced and unbalanced. The difference lies in the design and application.
Balanced mechanical seals have a secondary seal that balances the pressure on both sides of the seal faces, reducing the risk of leakage and wear.
Unbalanced mechanical seals do not have a secondary seal and rely on the pressure difference between the seal faces to maintain the seal.
Balanced seals are used in h...
Kalrez o-rings can withstand temperatures up to 327°C while PTFE o-rings can handle temperatures up to 260°C.
Kalrez o-rings have a higher temperature range than PTFE o-rings
Kalrez o-rings can handle temperatures up to 327°C
PTFE o-rings can handle temperatures up to 260°C
Installation of glass lined and hydrogenation reactors requires careful planning and execution.
Ensure proper site preparation and foundation design
Follow manufacturer's instructions for assembly and installation
Use appropriate lifting equipment and safety measures
Ensure proper sealing and insulation
Test for leaks and pressure before use
Checkpoints during installation of reactor mechanical seal
Alignment of seal faces
Proper installation of seal support system
Correct torque applied to bolts
Verification of seal flush system
Inspection of seal faces for damage or defects
Testing of seal for leakage
Documentation of installation process
Agitators are devices used to mix or stir liquids. There are various types of agitators used in different industries.
Types of agitators include paddle, turbine, anchor, propeller, and magnetic agitators
Paddle agitators are used for low viscosity fluids, while turbine agitators are used for high viscosity fluids
Anchor agitators are used for viscous materials that tend to stick to the walls of the container
Propeller agit...
Various types of oils are used in pumps depending on the application and operating conditions.
Mineral oil is commonly used for general purpose applications.
Synthetic oil is used for high temperature and high pressure applications.
Food grade oil is used in pumps that handle food products.
Fire-resistant oil is used in pumps that operate in high-risk areas.
Biodegradable oil is used in pumps that operate in environmentally...
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I appeared for an interview before Feb 2024.
I applied via Naukri.com and was interviewed in Sep 2021. There was 1 interview round.
I applied via Recruitment Consultant and was interviewed in Feb 2020. There was 1 interview round.
VCB stands for Vacuum Circuit Breaker, which is an electrical switch that uses vacuum as the dielectric medium.
VCB is used to protect electrical equipment from damage caused by overcurrents and short circuits.
It is commonly used in high voltage power systems.
VCBs are more reliable and require less maintenance compared to other types of circuit breakers.
They are also more environmentally friendly as they do not use any ...
DG stands for Diesel Generator, which is a backup power source used in case of power outages.
DG is a standalone power source that runs on diesel fuel.
It is commonly used as a backup power source in case of power outages.
DGs are often used in hospitals, data centers, and other critical facilities to ensure uninterrupted power supply.
They come in various sizes and capacities, depending on the power requirements of the fa...
DC motors convert electrical energy into mechanical energy through the interaction of magnetic fields.
DC motors have a stationary part called the stator and a rotating part called the rotor.
The stator contains the field windings that produce a magnetic field, while the rotor has the armature windings that carry the current.
The interaction of the magnetic fields causes the rotor to rotate, producing mechanical energy.
DC...
PLC stands for Programmable Logic Controller, a digital computer used for automation of electromechanical processes.
PLCs are used in industrial automation to control machinery and processes
They are programmed using ladder logic or other programming languages
PLCs can communicate with other devices and systems through various communication protocols
Examples of PLC applications include manufacturing, transportation, and b
I applied via Naukri.com and was interviewed in Sep 2022. There were 2 interview rounds.
I appeared for an interview before Nov 2023.
I applied via Walk-in and was interviewed before Jul 2022. There were 4 interview rounds.
Old experience and handling rescue situation.
I appeared for an interview in Feb 2025.
Reverse the array and basic coding q's
Identify the missing element in an array of consecutive integers.
Use the formula for the sum of the first n natural numbers: n(n + 1)/2.
Calculate the expected sum for the complete array.
Subtract the actual sum of the array from the expected sum to find the missing number.
Example: For array [1, 2, 4, 5], expected sum for 1 to 5 is 15, actual sum is 12, missing is 3.
I applied via Recruitment Consulltant and was interviewed before Jun 2022. There were 5 interview rounds.
Basic questions with respect to your role
Checkpoints during breakdown
Some of the top questions asked at the Iol Chemicals & Pharmaceuticals Mechanical Engineer interview -
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