Filter interviews by
Rate your
company
🤫 100% anonymous
How was your last interview experience?
Design principle refers to the fundamental concepts and guidelines that govern the process of designing structures or systems.
Design principle helps in ensuring functionality, efficiency, and safety of the structure or system.
It involves considering factors such as aesthetics, cost-effectiveness, and sustainability.
Examples include principles of structural integrity, material selection, and environmental impact assessm
Project Origens to any Observation profile Topics.
Industrial Project Observation to any requirement Case Study.
Industrial Project Order/ Contact or Regular Working environment assignment to sustain.
Project Origens to Observation expected
Question Coding Test.
Project Origens to Observation and expectations Profile forcast sustain
Aptitude Test Manual s.
BARC interview questions for popular designations
Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.
Mass is a scalar quantity and is measured in kilograms.
Weight is a vector quantity and is measured in newtons.
Mass remains constant regardless of the location, while weight varies depending on the gravitational pull.
Mass can be measured using a balance scale, while weight is measured using a spring scale.
For example...
I applied via Newspaper Ad and was interviewed before Apr 2023. There were 2 interview rounds.
It was a 100 question subject test
In an RLC circuit, the power quality across an inductor is reactive power.
The power quality across an inductor in an RLC circuit is reactive power, which means it does not result in actual work being done but rather stores and releases energy in the form of magnetic fields.
The reactive power in an inductor leads to a phase shift between voltage and current, with the current lagging behind the voltage in an inductive ci...
Yes, active power can be transferred using it.
Yes, active power can be transferred using electrical systems like transformers and transmission lines.
Active power transfer is essential for the functioning of electrical grids and power distribution networks.
Examples include transferring power from a power plant to homes and businesses.
Active power transfer is measured in watts (W) or kilowatts (kW).
Yes, a lagging zero power factor device can deliver active power.
A lagging zero power factor device can still deliver active power because it consumes both real and reactive power.
The power factor is a measure of how effectively electrical power is being converted into useful work output.
Even though the power factor may be lagging (less than 1), the device can still deliver active power to the load.
Examples of devices ...
The conductors will attract each other due to the magnetic field produced by the current flowing through them.
The conductors will experience a force of attraction between them
This is due to the magnetic field produced by the current flowing through the conductors
The direction of the current flow will determine the direction of the force
The basic electrical power equation is P = VI, where P is power, V is voltage, and I is current.
The basic electrical power equation is P = VI
Power (P) is measured in watts (W)
Voltage (V) is measured in volts (V)
Current (I) is measured in amperes (A)
The equation shows the relationship between power, voltage, and current
Higher voltage does not necessarily mean higher power, as power is determined by both voltage and current.
Power is calculated as the product of voltage and current (P = V * I)
Increasing voltage alone does not always increase power, as current may decrease
For example, a device operating at 10V and 1A has the same power as a device operating at 5V and 2A
Transmission voltage is kept high to reduce power loss over long distances.
Higher voltage reduces current, which in turn reduces power loss in transmission lines.
High voltage allows for efficient long-distance transmission without significant power loss.
Step-up transformers increase voltage for transmission, while step-down transformers decrease voltage for distribution.
Power loss is proportional to the square of the c...
The source impedance for maximum power transfer in AC circuits should be equal to the complex conjugate of the load impedance.
Source impedance should be equal to the complex conjugate of the load impedance for maximum power transfer.
This condition ensures that the maximum power is transferred from the source to the load.
In AC circuits, the source impedance should match the load impedance to achieve maximum power transf...
Complex conjugate is needed to maximize power transfer by ensuring the impedance matching between the source and load.
Complex conjugate helps in achieving impedance matching between source and load
Impedance matching minimizes reflections and maximizes power transfer
By taking the complex conjugate, the real part of the impedance is matched while the imaginary part cancels out
Common emitter is called an inverter because it produces an output that is the opposite of the input signal.
In a common emitter configuration, the output signal is 180 degrees out of phase with the input signal.
The common emitter amplifier produces a phase shift of 180 degrees, effectively inverting the input signal.
This inversion property is why the common emitter amplifier is also known as an inverter.
A transistor configuration with high input impedance and low output impedance is called a buffer.
Buffers are used to isolate two circuits with different impedance levels.
Common emitter or common collector configurations are often used as buffers.
Buffers help prevent loading effects and signal distortion in electronic circuits.
No, an opAmp cannot be used as a computer.
OpAmps are analog devices used for amplifying signals, not for digital computation.
OpAmps lack the necessary components such as memory, processing units, and input/output interfaces to function as a computer.
Computers require complex digital circuits and software to perform tasks, which opAmps are not designed for.
The two transistor model of a Silicon Controlled Rectifier consists of an NPN and PNP transistor connected in a feedback loop.
The NPN transistor is connected in series with the PNP transistor, forming a regenerative feedback loop.
When a gate pulse is applied, it triggers the NPN transistor to turn on, which in turn triggers the PNP transistor to turn on.
This regenerative process continues until the SCR is in forward co...
Single phase induction motors are not self-starting due to the absence of a rotating magnetic field.
Single phase induction motors lack a rotating magnetic field, which is necessary for self-starting.
The starting torque in single phase motors is zero, making it impossible for them to start on their own.
Additional starting mechanisms such as capacitors or shaded poles are required to create the necessary rotating magneti...
DC series motor is preferred for traction applications due to its high starting torque and speed control capabilities.
DC series motor provides high starting torque, making it suitable for traction applications where high torque is required to start moving heavy loads.
DC series motor offers good speed control capabilities, allowing for smooth acceleration and deceleration in traction applications.
DC series motor is simp...
KCL and KVL have limitations in complex circuits and non-linear components.
KCL assumes all currents entering a node must equal all currents leaving, which may not hold true in complex circuits.
KVL assumes the sum of voltage drops in a closed loop is zero, which may not be accurate in circuits with non-linear components.
Both laws are based on ideal conditions and may not be applicable in real-world scenarios.
KCL and KVL...
Barkhausen Criteria is used in determining the conditions for the onset of magnetic domain wall motion in ferromagnetic materials.
Used in understanding the behavior of magnetic domains in ferromagnetic materials
Helps in predicting the conditions for the initiation of magnetic domain wall motion
Important in the study of magnetic hysteresis and magnetic materials
25 KV is preferred for railway traction due to its higher efficiency, reduced power loss, and ability to support longer distances.
25 KV allows for higher speeds and heavier loads compared to lower voltages like 1.5 KV or 3 KV
It reduces power loss during transmission, leading to higher efficiency and cost savings
Higher voltage enables longer distances between substations, reducing infrastructure costs
25 KV is a standard...
I applied via Newspaper Ad and was interviewed before Oct 2022. There was 1 interview round.
Rotating magnetic field in an AC motor is a magnetic field that rotates within the motor, causing the rotor to turn and generate mechanical energy.
Rotating magnetic field is created by the interaction of stator windings with the alternating current flowing through them.
The rotating magnetic field induces currents in the rotor, which in turn creates a torque that causes the rotor to rotate.
This rotation of the rotor is ...
Nyquist plot is a graphical representation of a system's frequency response in the complex plane.
Nyquist plot shows how a system responds to sinusoidal inputs at different frequencies.
It is used to analyze stability and performance of control systems.
The plot typically consists of a plot of the real part of the transfer function against the imaginary part.
Nyquist plots are commonly used in control engineering and signa...
Removing a slice of the core in a transformer can lead to decreased efficiency and increased losses.
Removing a slice of the core can disrupt the magnetic flux path, leading to increased eddy current losses.
It can also result in increased hysteresis losses, as the magnetic field is no longer evenly distributed.
Overall, the performance of the transformer will be negatively impacted, with decreased efficiency and potentia...
An induction motor works on the principle of electromagnetic induction to generate rotating magnetic field.
Induction motor has a stator with a set of windings that are connected to an AC power supply.
When AC current flows through the stator windings, it produces a rotating magnetic field.
This rotating magnetic field induces current in the rotor windings, causing it to rotate.
The rotor never reaches the synchronous spee...
Removing a cross-sectional slice of the core in a transformer will decrease the voltage.
Removing a cross-sectional slice of the core reduces the magnetic flux in the transformer
This reduction in magnetic flux leads to a decrease in the induced voltage in the windings
As a result, the voltage output of the transformer decreases
This can impact the efficiency and performance of the transformer
I applied via Company Website and was interviewed before May 2023. There was 1 interview round.
Top trending discussions
Some of the top questions asked at the BARC interview -
based on 14 interviews
Interview experience
Anonymously discuss salaries, work culture, and many more
Get Ambitionbox App
Scientific Officer
65
salaries
| ₹8.8 L/yr - ₹30.5 L/yr |
Associate Manager
26
salaries
| ₹4.8 L/yr - ₹14.3 L/yr |
Senior Executive
20
salaries
| ₹4.8 L/yr - ₹11 L/yr |
Scientist
13
salaries
| ₹8.1 L/yr - ₹16.4 L/yr |
Research Associate
11
salaries
| ₹5.2 L/yr - ₹10.2 L/yr |
Defence Research & Development Organisation
Nielsen Holdings
Kantar
GfK MODE