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Larsen & Toubro Limited
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I applied via Walk-in and was interviewed in Sep 2023. There were 2 interview rounds.
P&ID of Pump System shows the piping, equipment, instrumentation, and control interlocks of the system.
Include pump symbol with arrows indicating flow direction
Label all equipment such as pumps, valves, tanks, etc.
Show instrumentation like pressure gauges, flow meters, etc.
Indicate control interlocks and safety features
Use standard symbols and colors as per industry guidelines
NPSH available stands for Net Positive Suction Head available, which is a measure of the absolute pressure at the suction port of a pump.
NPSH available is the total suction head in feet absolute at the suction nozzle of the pump.
It is important for ensuring that the pump does not cavitate, which can cause damage to the pump and decrease efficiency.
NPSH available is calculated by subtracting the vapor pressure of the li...
NPSH is calculated by subtracting the vapor pressure of the liquid from the total head of the pump.
NPSH = H - (Pv / rho * g)
H is the total head of the pump
Pv is the vapor pressure of the liquid
rho is the density of the liquid
g is the acceleration due to gravity
Ensure all units are consistent (e.g. meters, Pascal, kg/m^3, m/s^2)
A two-phase system P&ID shows the process flow of a system with two distinct phases.
Identify the two phases involved in the system (e.g. liquid-gas, solid-liquid).
Use different symbols to represent each phase on the P&ID.
Show the flow direction and connections between components in the system.
Include labels and legends to explain the components and their functions.
Ensure clarity and consistency in the representation of
I was interviewed in Jan 2024.
Types of PSV include conventional spring-loaded PSV, pilot-operated PSV, balanced bellows PSV, and rupture disc PSV.
Conventional spring-loaded PSV
Pilot-operated PSV
Balanced bellows PSV
Rupture disc PSV
Heat exchanger types include shell and tube, plate, finned tube, and double pipe.
Shell and tube heat exchanger
Plate heat exchanger
Finned tube heat exchanger
Double pipe heat exchanger
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I applied via Job Portal and was interviewed in Oct 2021. There were 2 interview rounds.
Larsen & Toubro Limited interview questions for designations
Different types of Pressure Safety Valves (PSVs) and factors to consider when selecting them
Types of PSVs include conventional, balanced bellows, pilot-operated, and rupture disc
Factors to consider when selecting a PSV include set pressure, relieving capacity, back pressure, and operating temperature
Conventional PSVs are commonly used for low to medium pressure applications, while pilot-operated PSVs are suitable for h...
I applied via Company Website and was interviewed in Aug 2023. There was 1 interview round.
posted on 17 Oct 2022
I applied via Approached by Company and was interviewed before Oct 2021. There were 3 interview rounds.
The paint RAL code and thickness applied on the fixture is recorded for quality control purposes.
The RAL code is a standardized color code system used in Europe.
The paint thickness is measured using a paint thickness gauge.
The recorded data is used to ensure consistency in the painting process and to meet customer specifications.
Example: RAL 9005 (Jet Black) with a paint thickness of 50 microns.
The clamps used on the fixture are made by various manufacturers.
The make of clamps used on the fixture may vary depending on the specific fixture and its requirements.
Some common manufacturers of clamps include Bessey, Irwin, and Jorgensen.
The type of clamp used may also vary, such as C-clamps, bar clamps, or spring clamps.
VSM graph is a tool used in Lean manufacturing to map out the current state of a process and identify areas for improvement.
VSM stands for Value Stream Mapping
It is used to visualize the flow of materials and information through a process
Helps identify waste and inefficiencies in the process
Can be used to plan and implement process improvements
Example: A VSM graph can be used to identify bottlenecks in a manufacturing ...
Heat duty is the amount of heat energy required or removed in a process.
Heat duty is a measure of the amount of heat energy needed to be added or removed in a process.
It is typically measured in units such as BTU/hr or kW.
Heat duty calculations are important in designing and optimizing heat exchangers, reactors, and other process equipment.
For example, in a distillation column, the heat duty would refer to the amount o...
Study well in simple aptitude problems and basic core subjects. Then you will clear this exam easily
posted on 23 Apr 2020
I applied via Naukri.com and was interviewed in Oct 2019. There were 4 interview rounds.
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