10+ Vyapar Interview Questions and Answers

Cylinder blocks are made of cast iron or aluminum alloy, while pistons are made of aluminum alloy.

• Cylinder blocks can also be made of steel or magnesium alloy.

• Aluminum alloy is preferred for pistons due to its lightweight and good thermal conductivity.

• Cast iron is preferred for cylinder blocks in diesel engines due to its strength and durability.

• Steel is preferred for high-performance engines due to its strength and heat resistance.

• Magnesium alloy is used in some racing engin...read more

Supercharging and turbocharging are methods of increasing the power output of an engine by forcing more air into the combustion chamber.

• Supercharging uses a belt-driven compressor to force more air into the engine

• Turbocharging uses exhaust gases to spin a turbine which compresses air and forces it into the engine

• Both methods increase engine power and performance

• Superchargers provide instant boost while turbochargers have a slight delay before boost kicks in

• Examples of superch...read more

Cooling towers remove heat from water used in industrial processes, while chillers cool water for air conditioning systems.

• Cooling towers use evaporation to remove heat from water, while chillers use refrigeration to cool water.

• Cooling towers are used in industrial processes such as power plants, while chillers are used in air conditioning systems for buildings.

• Cooling towers are typically larger and more complex than chillers.

• Examples of cooling tower applications include co...read more

Calculating pressure vessel blank diameter for hemisphere type dishes

• Determine the required volume and pressure of the vessel

• Calculate the radius of the hemisphere using the formula r = d/2

• Calculate the surface area of the hemisphere using the formula SA = 2πr^2

• Calculate the required thickness of the vessel walls using the formula t = PR/(2SE - 0.2P)

• Calculate the blank diameter using the formula BD = 2r + 2t

Carbon credit is a permit that allows a company to emit a certain amount of carbon dioxide or other greenhouse gases.

• Carbon credits are traded on carbon markets.

• The value of a carbon credit in Euro varies depending on the market demand and supply.

• The European Union Emissions Trading System (EU ETS) is the largest carbon market in the world.

• In 2021, the price of a carbon credit in the EU ETS reached a record high of over 50 Euro per tonne of CO2.

• Carbon credits can be used by c...read more

Witness and review testing of electrical equipment to ensure compliance with standards and specifications.

• Review testing procedures and documentation

• Ensure equipment is tested in accordance with relevant standards and regulations

• Verify test results and report any discrepancies

• Provide recommendations for improvements if necessary

• Witness actual testing process to ensure accuracy and reliability

2 stroke engines have higher power output but lower fuel efficiency compared to 4 stroke engines.

• 2 stroke engines have a simpler design with fewer moving parts.

• 2 stroke engines produce power every revolution while 4 stroke engines produce power every other revolution.

• 2 stroke engines require a mixture of oil and fuel while 4 stroke engines have a separate oil system.

• 4 stroke engines have better fuel efficiency and produce less emissions than 2 stroke engines.

• Examples of 2 str...read more

Supportive instruments for piping include pipe hangers, clamps, supports, and anchors.

• Pipe hangers are used to support the weight of the pipe and its contents.

• Clamps are used to hold pipes in place and prevent movement.

• Supports are used to provide additional stability and prevent sagging or bending.

• Anchors are used to secure the pipe in place and prevent it from shifting.

• Examples include beam clamps, clevis hangers, riser clamps, and sway braces.

The iron-carbon equilibrium diagram shows the relationship between carbon content and temperature in steel.

• The diagram is also known as the 'iron-iron carbide diagram'

• It is used to determine the properties of steel at different temperatures and carbon contents

• The diagram shows the different phases of steel, including ferrite, austenite, and cementite

• The eutectoid point on the diagram represents the composition of steel that will transform entirely to pearlite upon cooling

• The ...read more

Boiler and turbine light up procedure

• Check fuel and water levels

• Purge air from the system

• Start the boiler and bring it to operating pressure

• Open the turbine inlet valve and gradually increase load

• Monitor and adjust parameters as necessary