L&T Construction Process Engineer Interview Questions and Answers

Q1. Draw P&ID of Pump System
Ans. 
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
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Q2. What is npsh available
Ans. 
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...read more
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Q3. How to calculate NPSH
Ans. 
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)
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Q4. Draw two phase system p&ID
Ans. 
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
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Q1. What are types of psv
Ans. 
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
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Q2. What are heat exchanger types
Ans. 
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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Q1. Past experience question...
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Q1. Pumps, line and hydrualics
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Q1. Draw P&ID of Pump System
Ans. 
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
Answered by AI
Add your answer
Q2. What is npsh available
Ans. 
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...read more
Answered by AI
View 1 more answer
Q3. How to calculate NPSH
Ans. 
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)
Answered by AI
Add your answer
Q4. Draw two phase system p&ID
Ans. 
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
Answered by AI
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Normal level English grammer and General Maths

Q1. Normal and easy
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Q2. Tell me about yourself
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Q3. Strength and warkness
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Q4. About Insurance
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Q1. Tell me about Yourself
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Q1. What are types of psv
Ans. 
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
Answered by AI
Add your answer
Q2. What are heat exchanger types
Ans. 
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
Answered by AI
Add your answer

Q1. Past experience question...
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