OJT

OJT Interview Questions and Answers

Updated 19 Dec 2024

Q1. What is first law of Newton ? What is definition of Force?

Ans.

First law of Newton states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an external force. Force is a push or pull on an object that can cause it to accelerate or change direction.

  • First law of Newton is also known as the law of inertia

  • Force is measured in Newtons (N)

  • Examples of force include gravity, friction, and tension

  • Force can be represented by vectors, with magnitude and direction

  • Fo...read more

Q2. For chemical engineering Types of pumps& working Modes of heat transfer Heat transfer &mass transfer co efficient Some basic basic questions asking not dipper questions asking

Ans.

Types of pumps include centrifugal, reciprocating, and rotary pumps. Heat transfer modes include conduction, convection, and radiation.

  • Types of pumps: centrifugal, reciprocating, rotary

  • Heat transfer modes: conduction, convection, radiation

  • Heat transfer coefficient: measure of how well a material transfers heat

  • Mass transfer coefficient: measure of how well a material transfers mass

Q3. What is the process of steelmaking?

Ans.

Steelmaking is the process of producing steel from iron ore and/or scrap metal through various methods such as blast furnaces or electric arc furnaces.

  • Iron ore is first mined and then processed to remove impurities.

  • The purified iron ore is then combined with coal and limestone in a blast furnace to create molten iron.

  • The molten iron is further processed to remove impurities and adjust the carbon content to create steel.

  • Alternatively, scrap metal can be melted in an electric a...read more

Q4. Driving force of heat and mass transfer

Ans.

The driving force of heat and mass transfer is the difference in temperature or concentration between two points.

  • Temperature difference drives heat transfer - for example, hot coffee cooling down in a room

  • Concentration gradient drives mass transfer - for example, diffusion of perfume in a room

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Q5. Types of pumps & valve used industry

Ans.

Various types of pumps and valves are used in industries for different applications.

  • Types of pumps: centrifugal pumps, positive displacement pumps, diaphragm pumps, gear pumps

  • Types of valves: gate valves, globe valves, ball valves, butterfly valves

  • Pumps and valves are used in industries such as oil and gas, water treatment, chemical processing

  • Each type of pump and valve has specific characteristics and applications

Q6. Types of mod of heat transfer

Ans.

There are three main modes of heat transfer: conduction, convection, and radiation.

  • Conduction: Heat transfer through direct contact between particles. Example: Touching a hot stove.

  • Convection: Heat transfer through the movement of fluids (liquids or gases). Example: Boiling water.

  • Radiation: Heat transfer through electromagnetic waves. Example: Sunlight warming the Earth.

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Q7. Thermodynamics law's

Ans.

Thermodynamics laws govern energy transfer and transformation in physical systems.

  • First law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted.

  • Second law of thermodynamics states that the entropy of an isolated system always increases over time.

  • Third law of thermodynamics states that as temperature approaches absolute zero, the entropy of a system approaches a minimum value.

  • Examples: A car engine converting fuel into mechanical ...read more

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