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A mechanical seal is a device that prevents fluid leakage between rotating and stationary parts in machinery.
Function: Mechanical seals are used to prevent leakage of fluids in pumps, compressors, and other rotating equipment.
Components: Typically consist of a rotating face, a stationary face, and a spring mechanism to maintain contact between the faces.
Applications: Commonly found in industries such as oil and ga...
NPSH (Net Positive Suction Head) is a critical parameter in pump operation, indicating the pressure available to prevent cavitation.
Definition: NPSH is the difference between the pressure at the pump suction and the vapor pressure of the liquid being pumped.
Importance: A higher NPSH value ensures that the pump operates efficiently without cavitation, which can damage the pump.
Types: There are two types of NPSH - N...
A split casing pump is a type of centrifugal pump designed for easy maintenance and efficient fluid transfer in various applications.
Design: Split casing pumps have a two-part casing that can be easily separated, allowing for quick access to internal components for maintenance.
Efficiency: They are designed to handle large volumes of fluid with high efficiency, making them suitable for industrial applications.
Appli...
Pump heating is primarily caused by friction, fluid viscosity, and inadequate cooling, affecting efficiency and lifespan.
Friction Loss: As fluid moves through the pump, friction between the fluid and pump components generates heat, increasing the temperature.
Viscosity of Fluid: Higher viscosity fluids require more energy to pump, leading to increased heat generation; for example, pumping oil vs. water.
Inadequate C...
A multistage pump is a type of pump that uses multiple impellers to increase fluid pressure and flow rate efficiently.
Increased Pressure: Multistage pumps are designed to achieve higher pressures than single-stage pumps by using multiple impellers in series.
Applications: Commonly used in water supply systems, boiler feed applications, and industrial processes requiring high pressure.
Types: Can be centrifugal or po...
1 kg of pressure corresponds to a specific height of fluid, depending on the fluid's density and gravitational acceleration.
Hydraulic Head: The height of a fluid column that can exert a certain pressure, calculated using the formula: Head (m) = Pressure (Pa) / (Density (kg/m³) * g (m/s²)).
Example Calculation: For water (density = 1000 kg/m³, g = 9.81 m/s²), 1 kg pressure = 1,000 Pa, resulting in a head of approxim...
Pump spares are essential components that ensure the efficient operation and maintenance of pumps in various applications.
Seals: Prevent leakage of fluids; examples include mechanical seals and O-rings.
Bearings: Support rotating parts; examples include ball bearings and roller bearings.
Impellers: Increase fluid flow; examples include centrifugal and positive displacement impellers.
Gaskets: Provide sealing between ...
Improving power factor involves reducing reactive power consumption and increasing the efficiency of the system.
Install power factor correction capacitors to offset reactive power
Upgrade to more efficient equipment to reduce reactive power consumption
Implement power factor correction techniques such as phase-shifting transformers
Regularly monitor and maintain power factor levels to ensure efficiency
Educate staff o...
Different types of relays used in a substation include protective relays, auxiliary relays, and control relays.
Protective relays are used to detect abnormal conditions in the power system and initiate corrective actions.
Auxiliary relays are used for auxiliary functions such as interlocking, signaling, and indication.
Control relays are used to control the operation of various equipment in the substation.
Examples of...
Vendor registration procedure in Government organizations involves submitting required documents and completing registration forms.
Contact the procurement department of the specific government organization
Submit necessary documents such as proof of business registration, tax identification number, and financial statements
Complete vendor registration forms provided by the government organization
Attend any mandatory...
Experienced IT Manager with 10+ years of leading teams and implementing technology solutions.
Managed a team of 20+ IT professionals in a corporate setting
Implemented a new CRM system resulting in 20% increase in sales
Led a successful network infrastructure upgrade project
Over 10 years of experience in IT management, leading teams to successfully implement and maintain various technology solutions.
Led a team in the implementation of a new CRM system, resulting in improved customer relationship management.
Managed IT infrastructure upgrades, ensuring minimal downtime and maximum efficiency.
Developed and implemented IT security policies to protect company data from cyber threats.
Collaborat...
I appeared for an interview in Mar 2025, where I was asked the following questions.
I have 5 years of experience working as a surveyor in various construction projects.
5 years of experience in surveying
Worked on various construction projects
Familiar with using surveying equipment and software
I applied via Recruitment Consulltant and was interviewed before Aug 2023. There was 1 interview round.
Vendor registration procedure in Government organizations involves submitting required documents and completing registration forms.
Contact the procurement department of the specific government organization
Submit necessary documents such as proof of business registration, tax identification number, and financial statements
Complete vendor registration forms provided by the government organization
Attend any mandatory vend...
I applied via Recruitment Consulltant and was interviewed before Jul 2023. There was 1 interview round.
Pumps are devices used to move fluids by mechanical action. They work by creating a pressure difference to push the fluid through a system.
Pumps come in various types such as centrifugal pumps, positive displacement pumps, and diaphragm pumps.
Centrifugal pumps work by using a rotating impeller to create a centrifugal force that pushes the fluid outwards.
Positive displacement pumps trap a fixed amount of fluid and then ...
Npsha stands for Net Positive Suction Head Available and Npshr stands for Net Positive Suction Head Required.
Npsha is the total suction head in a pumping system, including atmospheric pressure, static head, and velocity head.
Npshr is the minimum suction head required to prevent cavitation in the pump.
Npsha must be greater than Npshr to ensure proper pump operation.
Calculating Npsha and Npshr is crucial in selecting the...
I applied via Company Website
Group discussion of Employees to set your goal , productivity of Organization. Decision maker and leadership.
I applied via Approached by Company and was interviewed in Apr 2023. There was 1 interview round.
The question is about soil testing, piling, foundation, concrete mix design, RCC foundation or raft, use of cover block, steel testing, and safety-related questions.
Soil testing is the process of analyzing soil samples to determine its properties and suitability for construction.
Piling is a technique used to strengthen the foundation of a building by driving piles into the ground.
Foundation is the base of a building th...
I appeared for an interview before Feb 2024.
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