20+ Soham Commerce Classes Interview Questions and Answers

Boundary layer flow is a thin layer of fluid near a solid surface where velocity changes from zero to the free stream velocity.

• Boundary layer flow occurs near a solid surface, such as the surface of an aircraft wing or a pipe.

• In boundary layer flow, the velocity of the fluid changes from zero at the surface to the velocity of the free stream away from the surface.

• The boundary layer can be laminar or turbulent, depending on the Reynolds number.

• Laminar boundary layer flow is sm...read more

Decision-uncertainty analysis to determine expected profit of renting external factory or expanding own factory for whisky manufacturer.

• Conduct a cost-benefit analysis for both options

• Consider the risks and uncertainties associated with each option

• Evaluate the potential returns and profitability of each option

• Assess the impact on the company's long-term growth and sustainability

• Compare the financial and non-financial factors of each option

• Example: Renting an external factory ...read more

I used computational fluid dynamics (CFD) simulations to model the bubble dynamics.

• I employed the Eulerian-Eulerian approach to model the two-phase flow of gas and liquid.

• I used the volume of fluid (VOF) method to track the interface between the gas and liquid phases.

• I considered the effects of surface tension, gravity, and turbulence on the bubble dynamics.

• I validated the CFD simulations with experimental data to ensure accuracy.

Transmission power is in multiples of 11kv due to historical reasons and practical considerations.

• Historically, the standard voltage levels for transmission were established based on the capabilities of early power generation and transmission equipment.

• Using multiples of 11kv allows for efficient power transmission and reduces losses.

• It provides a balance between transmission efficiency and equipment cost.

• Higher voltage levels require more insulation and larger conductors, in...read more

I would assess the situation and take necessary steps to ensure work is not affected.

• Check if the worker has informed anyone about their absence

• Determine the urgency of the worker's tasks and delegate them to other workers if necessary

• Inform the supervisor or manager about the absence and discuss possible solutions

• Ensure that the absent worker's responsibilities are covered to avoid any delays or setbacks

A PID controller is recommended for a rotary tobacco drier.

• PID controllers are commonly used in industrial processes for their ability to maintain a setpoint temperature with minimal overshoot and steady-state error.

• The controller should be able to handle the high temperatures and humidity levels in the drier environment.

• Consider the size and power requirements of the controller based on the size of the drier and the amount of tobacco being processed.

• Examples of suitable PID ...read more

Capacitors can be used to improve power factor by storing and releasing reactive power.

• Connect capacitors in parallel with inductive loads to offset their reactive power consumption

• Choose the appropriate capacitance value based on the load's reactive power and voltage

• Use a power factor correction controller to automatically switch capacitors on and off as needed

• Capacitors can also be used in series with inductive loads to improve power factor

• Example: A factory with large moto...read more

The intake port is usually bigger in size for IC engines.

• The intake port is responsible for allowing air and fuel mixture into the engine.

• A larger intake port can allow for more air and fuel to enter the engine, increasing power output.

• However, a larger intake port can also decrease the velocity of the air and fuel mixture, reducing efficiency.

• The size of the intake port can vary depending on the specific engine design and intended use.

• For example, a high-performance racing e...read more

Parallel and counter heat exchangers have different temperature profiles.

• In a parallel heat exchanger, the hot and cold fluids flow in the same direction.

• In a counter heat exchanger, the hot and cold fluids flow in opposite directions.

• In a parallel heat exchanger, the temperature difference between the hot and cold fluids is constant.

• In a counter heat exchanger, the temperature difference between the hot and cold fluids varies along the length of the exchanger.

• Examples of par...read more

Yes, I am against smoking and the manufacturing of cigarettes.

• I believe smoking is harmful to both individuals and society as a whole.

• Smoking is a leading cause of preventable diseases such as lung cancer, heart disease, and respiratory problems.

• Manufacturing cigarettes contributes to environmental pollution and deforestation.

• There are various campaigns and initiatives aimed at reducing smoking rates and promoting a smoke-free environment.

• Many countries have implemented stric...read more

Motor safety measures include regular maintenance, proper training, and the use of protective equipment.

• Regular maintenance and inspection of motors to ensure they are in good working condition

• Proper training for operators to understand the safe operation of motors

• Use of protective equipment such as gloves, goggles, and ear protection when working with motors

• Ensuring proper grounding and electrical safety measures are in place

• Implementing lockout/tagout procedures to prevent ...read more

The inputs were chosen based on their relevance and availability of data.

• The selected inputs were deemed to have the most impact on the model's output.

• Other inputs may not have been relevant or may have lacked sufficient data.

• The model may have been designed to focus on a specific aspect or problem.

• For example, a model predicting stock prices may only consider financial data.

• NO

Kevin Planck and Clausius stated the second law of thermodynamics.

• The second law states that the total entropy of a closed system cannot decrease over time.

• Planck's statement: it is impossible to construct a device that operates in a cycle and produces no effect other than the transfer of heat from a cooler body to a hotter body.

• Clausius' statement: heat cannot spontaneously flow from a colder body to a hotter body without the input of work.

• The second law has many practical a...read more

Bernoulli equation is a simplified form of Navier Stokes equation that applies to inviscid flow while Navier Stokes equation is a more general equation that applies to viscous flow.

• Bernoulli equation assumes no viscosity and no external forces acting on the fluid while Navier Stokes equation takes into account the effects of viscosity and external forces.

• Bernoulli equation is used to analyze fluid flow in simple systems like pipes, while Navier Stokes equation is used to anal...read more

Ductile materials can be stretched without breaking, while brittle materials break easily. Various tests can identify them.

• Ductile materials include copper, aluminum, and steel. Brittle materials include glass and ceramics.

• A tensile test can determine if a material is ductile or brittle. A ductile material will stretch before breaking, while a brittle material will break without stretching.

• A Charpy impact test can also identify brittle materials. This test measures the amount...read more

PID Controller is a feedback control system that continuously calculates and adjusts the control signal to maintain a desired setpoint.

• PID stands for Proportional-Integral-Derivative.

• It is widely used in industrial control systems to regulate processes and maintain stability.

• Advantages of PID controller include simplicity, robustness, and adaptability to various systems.

• Disadvantages include difficulty in tuning, sensitivity to noise, and limited performance for complex syste...read more

A Nyquist plot is a graphical representation of a system's frequency response. It is used to analyze stability and performance of control systems.

• It plots the imaginary part of the system's transfer function against its real part.

• It is used to determine the stability of a control system by analyzing the plot's shape.

• It is also used to analyze the performance of a control system by examining the plot's frequency response.

• It is commonly used in electrical engineering and contro...read more

I used this pump because it has a higher flow rate and is more efficient for the task at hand.

• Higher flow rate

• More efficient for task

• Better suited for the job

Vapour compression refrigeration is a process used to cool a space or substance by removing heat through the use of a refrigerant.

• Vapour compression refrigeration uses a compressor, condenser, expansion valve, and evaporator to remove heat from a space or substance.

• The refrigerant is compressed, which increases its temperature and pressure, and then condensed, which releases heat.

• The refrigerant then passes through an expansion valve, which reduces its pressure and temperatur...read more

Tonnage rating of a room is calculated based on its size and cooling requirements.

• Calculate the square footage of the room

• Determine the cooling requirements in BTUs per hour

• Divide the BTUs by 12,000 to get the required tonnage

• For example, a 300 sq. ft. room with cooling requirements of 9,000 BTUs per hour would require 0.75 tonnage