Groww Interview Questions and Answers

There are two main types of compressors: positive displacement and dynamic.

• Positive displacement compressors work by trapping a fixed amount of air and forcing it into a smaller space, while dynamic compressors use high-speed rotating impellers to accelerate and compress air.

• Examples of positive displacement compressors include reciprocating, rotary screw, and rotary vane compressors, while examples of dynamic compressors include centrifugal and axial compressors.

• The choice o...read more

CGD stands for City Gas Distribution. It is the process of distributing natural gas to households and industries in a city.

• CGD involves laying pipelines to transport natural gas

• It includes setting up of CNG stations for vehicles

• CGD companies are responsible for maintenance and safety of pipelines

• Examples of CGD companies in India are Indraprastha Gas Limited and Mahanagar Gas Limited

Aluminium forms a protective oxide layer on its surface, preventing further corrosion.

• Aluminium reacts with oxygen in the air to form a thin layer of aluminium oxide.

• This oxide layer acts as a barrier, preventing oxygen and moisture from reaching the underlying metal.

• The oxide layer is self-repairing, as any damage to it will react with oxygen to form a new layer.

• Aluminium's corrosion resistance is further enhanced by its ability to form complex oxide structures.

• Aluminium all...read more

The Iron carbon diagram shows the relationship between temperature, carbon content, and phases of iron-carbon alloys.

• The diagram is used to predict the microstructure and properties of steel.

• It consists of three regions: austenite, ferrite, and cementite.

• The eutectoid point represents the composition of steel that transforms to pearlite upon cooling.

• Alloying elements can shift the phases and change the properties of steel.

• The diagram is essential for understanding heat treatm...read more

NDT stands for Non-Destructive Testing. It is a method of testing materials without damaging them.

• NDT is used to detect flaws or defects in materials or structures.

• It is commonly used in industries such as aerospace, automotive, and construction.

• Examples of NDT methods include ultrasonic testing, radiography, and magnetic particle inspection.

• NDT helps ensure the safety and reliability of products and structures.

• It can also save time and money by identifying issues before they...read more

CGS stands for Centimeter-Gram-Second, a system of units used in physics and engineering.

• CGS is a metric system of units based on centimeters, grams, and seconds.

• It is commonly used in physics and engineering for measuring small quantities.

• For example, in CGS, force is measured in dynes, energy in ergs, and power in ergs per second.

• CGS is not commonly used in everyday life, as the SI system is more widely used.

• However, it is still used in some specialized fields, such as astr...read more

Natural gas is a fossil fuel composed mostly of methane, while LNG and PNG are forms of natural gas that have been processed for transportation and distribution.

• Natural gas is a non-renewable energy source that is primarily composed of methane.

• LNG (liquefied natural gas) is natural gas that has been cooled to -162°C, reducing its volume by 600 times and making it easier to transport.

• PNG (piped natural gas) is natural gas that is transported through pipelines to homes and busi...read more