Khopa Technologies Interview Questions and Answers

Pumps are classified based on their working principle and application.

• Pumps can be classified as centrifugal pumps or positive displacement pumps.

• Centrifugal pumps work on the principle of centrifugal force to move fluid, while positive displacement pumps trap a fixed amount of fluid and move it through the system.

• Examples of centrifugal pumps include water pumps used in homes, while examples of positive displacement pumps include gear pumps and piston pumps.

Absorption involves the penetration of one substance into another, while adsorption is the adhesion of molecules to a surface.

• Absorption is the process where one substance is taken in by another substance, such as a sponge absorbing water.

• Adsorption is the process where molecules adhere to the surface of a solid or liquid, like how a gas is adsorbed onto activated charcoal.

• Absorption typically involves the entire volume of the absorbing material, while adsorption only occurs ...read more

Mass transfer is the movement of mass from one place to another, often involving the separation of components in a mixture.

• Mass transfer involves the movement of one or more substances from one phase to another, such as from a liquid to a gas.

• It is commonly used in processes like distillation, absorption, and extraction to separate components in a mixture.

• Mass transfer can be driven by differences in concentration, temperature, or pressure between the phases.

• Examples include ...read more

A distillation column is a vertical tower used to separate and purify liquid mixtures based on differences in boiling points.

• Distillation columns consist of trays or packing material to increase surface area for vapor-liquid contact.

• Heat is applied at the bottom of the column to vaporize the liquid mixture.

• The vapor rises through the column, condenses at different heights based on boiling points, and is collected as separate products.

• Examples of distillation columns include t...read more

The range of a cooling tower typically refers to its cooling capacity, which can vary depending on factors like size, design, and materials used.

• The range of a cooling tower is usually measured in terms of cooling capacity, often expressed in tons of refrigeration or kilowatts.

• Factors that can affect the range of a cooling tower include the size of the tower, the design of its components (such as the fill media and fan), and the materials used in its construction.

• For example,...read more

Motor specification includes details such as power rating, voltage, current, speed, efficiency, and type of motor.

• Power rating: Indicates the amount of power the motor can handle, typically in watts or horsepower.

• Voltage: The electrical potential difference required to operate the motor, usually in volts.

• Current: The flow of electric charge in the motor, measured in amps.

• Speed: The rotational speed of the motor shaft, usually in revolutions per minute (RPM).

• Efficiency: The ra...read more