Simplex Infrastructures Senior Engineer Interview Questions and Answers

Q1. Introduce yourself
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Q2. Job responsibilities of current organisation
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Q1. Introduce yourself
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Q2. Why you want to leave your current organisation
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Q1. What is project management?
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Q1. Execution of Elevated Viaduct (ROB) 6.2KM 1200 numbers pile (Friction & end Bearing Pile) Foundation ROB Pile Cap and Pier, PSC T-Type Pier Cap, Post Tensioning Girder,Bow string (ROB) structure box interc...read more
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The execution of an elevated viaduct involves various tasks such as pile foundation, pier construction, post-tensioning girders, and bridge structures.
• Tasks include pile foundation construction for the viaduct, pier construction for support, post-tensioning of girders for strength, and bridge structure assembly.

• Activities also involve conducting load tests, NDT tests, deflection tests, and steel reconciliation for qual...read more
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Q2. Preparation of the planning of site execution day by day as per available drawing. Planning & indenting daily requirement of Labour, Construction Machinery, and Materials &Formwork. Organizing various dail...read more
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Q1. What is test procedure for Cement and steel and coarse aggregate and sand?
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The test procedures for cement, steel, coarse aggregate, and sand involve various physical and chemical tests to ensure quality and suitability for construction purposes.
• Cement: Tests include fineness, setting time, compressive strength, soundness, and chemical composition.

• Steel: Tests involve tensile strength, yield strength, elongation, and chemical composition.

• Coarse Aggregate: Tests include sieve analysis, specific...read more
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Q2. What is the grade using of concrete?
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The grade of concrete refers to its strength and durability.
• Concrete is graded based on its compressive strength, measured in megapascals (MPa).

• Common grades of concrete include M10, M15, M20, M25, etc.

• The higher the grade, the stronger the concrete.

• Different grades of concrete are used for different applications, such as foundations, slabs, columns, etc.
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Q3. What is the 28 days cube strength and value?
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28 days cube strength is a measure of the compressive strength of concrete after 28 days of curing.
• 28 days cube strength refers to the compressive strength of concrete cubes after they have been cured for 28 days.

• It is an important parameter to assess the quality and durability of concrete.

• The value of 28 days cube strength is typically expressed in megapascals (MPa) or pounds per square inch (psi).

• It is determined by ...read more
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Q1. What is your previous experience
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Q1. What is Surging?
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Surging is a phenomenon in which a system experiences rapid and temporary increases in pressure or flow rate.
• Surging can occur in various systems such as pipelines, compressors, pumps, and turbines.

• It is often caused by sudden changes in demand, equipment malfunctions, or improper system design.

• Surging can lead to damage to equipment, reduced efficiency, and safety hazards.

• Examples include water hammer in pipelines and
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Q2. What is Froude No?
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Froude number is a dimensionless number used to quantify the influence of gravity on fluid flow.
• Froude number is defined as the ratio of inertia force to gravitational force in a fluid flow.

• It is used to determine the type of flow (subcritical, critical, or supercritical) in open channel flow.

• Froude number is calculated as Fr = V / sqrt(g * d), where V is velocity, g is acceleration due to gravity, and d is depth of fl
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Q3. What is Weeping?
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Weeping is the process of fluid leaking out of a solid material, often due to damage or excess moisture.
• Weeping can occur in materials such as wood, concrete, and metal.

• It is often a sign of structural damage or deterioration.

• Examples include water weeping from a crack in a wall or oil weeping from a car engine.

• Weeping can also refer to the shedding of tears in humans and animals.
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Q1. Draw basic PFD of a WTP plant including feed quality and all the sensors.
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A basic PFD of a WTP plant including feed quality and sensors.
• Include feed quality parameters such as turbidity, pH, temperature, and flow rate

• Include sensors for monitoring parameters like chlorine levels, pressure, and conductivity

• Show the flow of water through various treatment processes like coagulation, flocculation, sedimentation, filtration, and disinfection
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Q2. What are the process checks done in Line testing of a 6inch dia pigging line including the calculations involved?
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Process checks in line testing of a 6inch dia pigging line and associated calculations
• Pressure testing to ensure integrity of the line

• Flow testing to check for blockages or restrictions

• Calibration of pigging equipment for accurate results

• Calculations involve pressure drop, flow rate, and pigging efficiency

• Recording and analyzing data for future reference
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Q1. Why do u qant to leave ur previous company?
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Q2. How do u solve a matter of conflict during a Project meeting?
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Q1. What is the HDPE and Di pipe is code ??
Ans. 
HDPE and Di pipe IS codes are standards set by the Bureau of Indian Standards for high-density polyethylene and ductile iron pipes.
• IS 4984: High-density polyethylene (HDPE) pipes for potable water supplies

• IS 8329: Ductile iron (DI) pipes and fittings for pressure pipelines
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Q2. Types of Aerator.
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Aerators are devices used to add air into water or other liquids to increase oxygen levels.
• Surface aerators

• Submersible aerators

• Diffused aerators

• Mechanical aerators

• Aspirating aerators
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Q3. 3 Types of Aerator - 1) cascade 2) Tray tower 3) spray nozal
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Q1. About salary and experience
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Q1. Chiller trouble shooting
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Q2. Work of cchiller
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A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle.
• Chillers are commonly used in air conditioning systems to cool buildings or industrial processes.

• They work by transferring heat from the liquid being chilled to a separate fluid, which is then circulated through a heat exchanger to cool it down.

• Chillers can be water-cooled or air-cooled, depending on the app
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Q3. Alarm and solutions
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Q4. Controlling andetc
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Salary and job responsibilities