HPCL Rajasthan Refinery Interview Questions, Process, and Tips

Q1. What is stress and strain and how can we measure these quantities?
Ans. 
Stress and strain are measures of the internal forces within a material. Stress is the force applied per unit area, while strain is the deformation of the material.
• Stress is the force applied per unit area on a material, measured in units like Pascals or pounds per square inch.

• Strain is the deformation or change in shape of a material due to stress, measured as a ratio of the change in length to the original length.

• Str...read more
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Q2. What is Fatigue failure?
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Fatigue failure is the weakening and eventual breaking of a material under repeated or fluctuating stress.
• Occurs due to repeated or fluctuating stress on a material

• Can lead to cracks, fractures, or complete failure

• Common in metal structures like bridges, aircraft, and machinery
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Q3. There are two type of loads present on the basis of variation of 3 load parameters, which are force magnitude, direction and point of application. If all these parameter don't change with time, then it wil...read more
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Static loads do not change with time, while dynamic loads involve at least one changing parameter. Fatigue failure occurs when a body is subjected to continuous dynamic loading.
• Static loads have constant force magnitude, direction, and point of application

• Dynamic loads involve changes in at least one of the load parameters over time

• Fatigue failure occurs when a body is subjected to continuous dynamic loading, leading t...read more
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Q4. What is NPSH of pump?
Ans. 
NPSH of a pump stands for Net Positive Suction Head, which is a measure of the pressure available at the suction port of the pump.
• NPSH is important for determining if a pump will operate properly without cavitation.

• It is calculated by subtracting the vapor pressure of the fluid from the total suction head of the pump.

• NPSH is typically provided by the pump manufacturer and must be greater than the required NPSH for the
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Q5. NPSH stands for Net positive suction head, which signifies pressure by the fluid on suction side of centrifugal pump. It must be greater than the atmospheric pressure because it this not happen then cavita...read more
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Q1. Chemical reaction engineering
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Q2. Heat Transfer operation, mass transfer operation, fluid mechanics
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Q1. Tell me about your self?
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Introduction & Experience Job Related

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Assignment is transfer of rights or property from one party to another.
Options Assignment occur when option buyers exercise their rights to a position in a security.
Other examples of assignments can be found in wages, mortgages and leases.

Q1. What is civil engineering short
Ans. 
Civil engineering is the design, construction, and maintenance of infrastructure and buildings.
• Civil engineers design and oversee the construction of roads, bridges, buildings, and other infrastructure.

• They ensure that structures are safe, functional, and meet environmental and regulatory standards.

• Civil engineers also maintain and repair existing infrastructure to ensure it remains safe and functional.

• Examples of civi...read more
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