Hindustan Urvarak & Rasayan Engineer Interview Questions and Answers for Experienced

Q1. Work experience
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Q2. Salary expectation
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Q1. What is bumping clearance in Reciprocating compressor
Ans. 
Bumping clearance in a reciprocating compressor is the minimum distance between the piston and the cylinder head at the top dead center.
• Bumping clearance is crucial to prevent contact between the piston and the cylinder head during operation.

• It is necessary to allow for thermal expansion of the components and to avoid damage.

• Proper bumping clearance ensures efficient operation and prolongs the lifespan of the compresso...read more
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Q2. What is mechanical seal
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A mechanical seal is a device that helps prevent leakage between two moving or stationary parts in a machine.
• Used in pumps, compressors, and other rotating equipment

• Consists of two main parts: stationary seal face and rotating seal face

• Common types include cartridge seals, component seals, and split seals
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Q3. Why pressure vessels made in cylindrical shape or spherical shape
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Pressure vessels are made in cylindrical or spherical shapes for structural integrity, ease of fabrication, and efficient use of material.
• Cylindrical shape provides uniform stress distribution and is easier to fabricate compared to other shapes.

• Spherical shape can withstand higher internal pressure due to uniform stress distribution in all directions.

• Cylindrical shape is commonly used for horizontal pressure vessels li...read more
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Q4. What is basic difference between ASME codes and API codes
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ASME codes are primarily used for pressure vessels and piping systems, while API codes are focused on the oil and gas industry.
• ASME codes are more general and cover a wide range of industries, while API codes are specific to the oil and gas industry.

• ASME codes are developed by the American Society of Mechanical Engineers, while API codes are developed by the American Petroleum Institute.

• ASME codes focus on design, cons...read more
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Q5. What are the micro alloys elements added to alloy steel
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Micro alloy elements added to alloy steel improve strength, toughness, and hardenability.
• Common micro alloy elements include vanadium, niobium, titanium, and boron.

• These elements help refine the grain structure of the steel, resulting in improved mechanical properties.

• Micro alloying also allows for the use of lower carbon content, reducing the risk of cracking during heat treatment.
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Process questions. you have work equipment .

Q1. Normally you have the plant working culture and safety questions
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Q2. Use safety equipment
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Safety equipment should always be used to prevent accidents and injuries.
• Always wear a helmet when riding a bike or motorcycle

• Use safety goggles when working with power tools

• Wear a seatbelt when driving or riding in a vehicle
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Q1. Questions on transformers
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Q2. Working of relays and types of relats
Ans. 
Relays are electrically operated switches that control high power circuits with low power signals. Types include electromechanical, solid state, and reed relays.
• Relays work by using an electromagnet to mechanically switch contacts open or closed.

• Types of relays include electromechanical relays, solid state relays, and reed relays.

• Electromechanical relays use an electromagnet to operate mechanical contacts.

• Solid state r...read more
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Q3. Star and delta stators
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Q4. What is single line Diagram
Ans. 
A single line diagram is a simplified diagram that shows the electrical connections and components of a power system in a single line.
• It is used to represent the electrical system in a simplified manner.

• It shows the connections between various components like generators, transformers, circuit breakers, etc.

• It helps in understanding the overall layout of the system and how different components are interconnected.

• It is c...read more
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Q1. A short brief of my introduction
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Q1. What equipment are followed and what are the safety precautions taken for chemicals charging
Ans. 
Equipment and safety precautions are followed for chemicals charging.
• Equipment such as pumps, hoses, and tanks are used for charging chemicals.

• Safety precautions include wearing personal protective equipment (PPE) such as gloves, goggles, and respirators.

• Chemicals are stored and handled in accordance with Material Safety Data Sheets (MSDS).

• Proper ventilation is maintained to prevent exposure to hazardous fumes.

• Spill co...read more
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Q1. Chennai basics &
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Q2. Mass transfer & Heat transfer
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