Piramal Group Interview Questions, Process, and Tips

Sandmeyer reaction is a substitution reaction that converts an aryl diazonium salt into various functional groups.

• Sandmeyer reaction is named after the Swiss chemist Traugott Sandmeyer.

• It involves the conversion of an aryl diazonium salt into a new functional group.

• Common functional groups formed in Sandmeyer reactions include halides, cyanides, and hydroxyl groups.

• The reaction proceeds through the formation of a diazo...read more

Enthalpy is the sum of internal energy and the product of pressure and volume.

• Enthalpy is a thermodynamic property of a system.

• It is represented by the symbol 'H'.

• It is defined as the sum of internal energy and the product of pressure and volume.

• Enthalpy change is the heat absorbed or released during a chemical reaction.

• Enthalpy is used in various fields including chemistry, physics, and engineering.

Validation ensures that a process or system meets the intended requirements, while qualification ensures that the equipment or system is installed and operates correctly.

• Validation is focused on the process or system, while qualification is focused on the equipment or system.

• Validation ensures that the process or system meets the intended requirements, while qualification ensures that the equipment or system is install...read more

Pressure differential is the difference in air pressure between two points in an HVAC system.

• It is important for maintaining proper airflow and ventilation.

• It can be measured using a manometer.

• A high pressure differential can indicate a clogged filter or duct.

• A low pressure differential can indicate a malfunctioning fan or blower.

• It is often used in cleanroom environments to prevent contamination.

There are several types of pumps including centrifugal, positive displacement, and axial flow pumps.

• Centrifugal pumps use a rotating impeller to create a flow of fluid.

• Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge port.

• Axial flow pumps move fluid parallel to the pump shaft.

• Other types of pumps include reciprocating pumps, peristaltic pumps, and jet pumps.

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

• Positive displacement compressors work by trapping air in a chamber and reducing the volume of the chamber to compress the air. Examples include reciprocating, rotary screw, and rotary vane compressors.

• Dynamic compressors work by imparting velocity to the air and then converting that velocity into pressure. Examples include centrifugal and axial...read more

HVAC stands for Heating, Ventilation, and Air Conditioning.

• HVAC is a system used for regulating temperature, humidity, and air quality in buildings.

• It includes components such as furnaces, air conditioners, ductwork, and thermostats.

• HVAC systems can be found in residential, commercial, and industrial buildings.

• Proper maintenance of HVAC systems is important for energy efficiency and indoor air quality.

A typical water system diagram includes a water source, treatment plant, distribution network, and end-users.

• Water source can be a river, lake, or groundwater well

• Treatment plant removes impurities and disinfects water

• Distribution network includes pipes, pumps, and storage tanks

• End-users can be residential, commercial, or industrial

• Backflow prevention devices are installed to prevent contamination

Breakdowns in chillers can be caused by various factors such as electrical issues, refrigerant leaks, and mechanical failures.

• Electrical issues such as faulty wiring or blown fuses can cause breakdowns in chillers.

• Refrigerant leaks can occur due to corrosion or damage to the chiller's components.

• Mechanical failures such as worn out bearings or broken belts can also cause breakdowns in chillers.

• Dirty or clogged filters ...read more

Boiler efficiency is the ratio of energy output to energy input.

• Efficiency is important for reducing fuel consumption and costs.

• Factors affecting efficiency include combustion efficiency, thermal efficiency, and fuel-to-steam efficiency.

• Regular maintenance and cleaning can improve efficiency.

• For example, reducing excess air can improve combustion efficiency.

• Another example is using economizers to recover heat from flue...read more

There are various types of seals used in different industries and applications.

• Mechanical seals: used to prevent leakage between rotating and stationary parts, commonly used in pumps and compressors.

• Hydraulic seals: used to prevent fluid leakage in hydraulic systems, commonly used in cylinders and valves.

• O-ring seals: used to create a seal between two mating surfaces, commonly used in plumbing and automotive applicatio...read more

Porter's model is a framework for analyzing the competitive forces in an industry.

• Porter's model, also known as Porter's Five Forces, was developed by Michael Porter in 1979.

• It helps identify the attractiveness and profitability of an industry by analyzing five competitive forces: threat of new entrants, bargaining power of buyers, bargaining power of suppliers, threat of substitute products or services, and intensity ...read more

The divisibility rule of 3 states that a number is divisible by 3 if the sum of its digits is divisible by 3.

• To prove the divisibility rule of 3, we need to show that any number that satisfies the rule is indeed divisible by 3.

• The rule states that if the sum of the digits of a number is divisible by 3, then the number itself is divisible by 3.

• For example, let's take the number 123. The sum of its digits is 1 + 2 + 3 = ...read more

ROI can be calculated by dividing the net profit from the training program by the total cost of the program and multiplying by 100.

• Calculate the net profit by subtracting the total cost of the program from the revenue generated as a result of the training.

• Divide the net profit by the total cost of the program.

• Multiply the result by 100 to get the ROI percentage.

• For example, if the training program cost $10,000 and gene...read more

Porter's model can be applied to compare B-Schools based on factors like competitive rivalry, bargaining power of students, threat of new entrants, etc.

• Competitive rivalry: Analyze the intensity of competition among B-Schools in terms of rankings, faculty, curriculum, etc.

• Bargaining power of students: Evaluate the influence students have in terms of fees, scholarships, placement opportunities, etc.

• Threat of new entrant...read more