Orion Electrical Maintenance Technician Interview Questions and Answers

Reasoning , mathematics

Q1. What is behaviour ?
Ans. 
Behaviour refers to the way in which a person or animal acts or conducts themselves in response to a particular situation or stimulus.
• Behaviour is influenced by genetics, environment, and past experiences.

• It can be observed and measured through actions, reactions, and responses.

• Behaviour can be categorized as either innate (instinctual) or learned.

• Examples of behaviour include aggression, shyness, curiosity, and friend
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Q2. What is the best method in power transfers?
Ans. 
The best method in power transfers is through high voltage transmission lines.
• High voltage transmission lines are more efficient in transferring power over long distances.

• Using transformers to step up the voltage before transmission and step down the voltage at the receiving end helps minimize power loss.

• HVDC (High Voltage Direct Current) transmission is another efficient method for long distance power transfers.

• Smart ...read more
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Q1. What is current
Ans. 
Current is the flow of electric charge through a conductor.
• Current is measured in Amperes (A)

• It is the rate of flow of electric charge

• Current can be either direct current (DC) or alternating current (AC)

• Examples: A light bulb connected to a power source has current flowing through it

• In a circuit, current flows from the positive terminal of the voltage source to the negative terminal
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Q2. What are the method to convert in inverter
Ans. 
Methods to convert inverter include pulse width modulation, sine wave modulation, and square wave modulation.
• Pulse width modulation (PWM) is a common method used to convert inverter signals by varying the width of the pulses.

• Sine wave modulation involves generating a sine wave signal to mimic the output of an inverter.

• Square wave modulation produces a square wave output by switching between high and low voltage levels.

• ...read more
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Q1. What is the transformer?
Ans. 
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are used to increase or decrease voltage levels in electrical circuits.

• They consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to the input voltage source, while the secondary coil is connected to the output load.

• Transformers...read more
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Q2. What is the UPS?
Ans. 
UPS stands for Uninterruptible Power Supply, a device that provides emergency power to a load when the input power source fails.
• UPS ensures continuous power supply during power outages or fluctuations

• It typically consists of a battery, inverter, and charger

• Commonly used in data centers, hospitals, and critical infrastructure

• Examples include APC, CyberPower, and Eaton UPS systems
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Q3. What is MCB ?
Ans. 
MCB stands for Miniature Circuit Breaker, a device designed to protect electrical circuits from overloads and short circuits.
• MCB is a type of circuit breaker that automatically switches off electrical circuits during abnormal conditions like overload or short circuit.

• It is commonly used in residential and commercial electrical installations to protect electrical equipment and prevent electrical fires.

• MCBs are available...read more
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Q4. Current and Voltage difference?
Ans. 
Current is the flow of electric charge, measured in Amperes, while voltage is the force that drives the current, measured in Volts.
• Current is the rate of flow of electric charge in a circuit.

• Voltage is the electrical potential difference that drives the current.

• Current is measured in Amperes (A) while Voltage is measured in Volts (V).

• Ohm's Law relates current, voltage, and resistance: V = I * R.
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Q5. What is the CT AND PT?
Ans. 
CT and PT are electrical devices used in power systems to measure current and voltage respectively.
• CT stands for Current Transformer and is used to measure high currents by stepping down the current to a lower value.

• PT stands for Potential Transformer and is used to measure high voltages by stepping down the voltage to a lower value.

• CTs and PTs are commonly used in power distribution systems to provide accurate measure
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Q6. What is the last rating MCB hou to the amps
Ans. 
The last rating MCB can go up to 125 amps.
• The last rating MCB can typically go up to 125 amps.

• MCBs are available in various ratings such as 6A, 10A, 16A, 32A, 63A, and 125A.

• The rating of an MCB determines the maximum current it can safely handle before tripping.

• For higher current requirements, larger MCBs or other protective devices like MCCBs may be used.
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Q1. Asking for bms system
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Q2. Previous year experience
Ans. 
I have 3 years of experience working as an Electrical Engineer in a power distribution company.
• Designed electrical systems for new construction projects

• Performed regular maintenance on electrical equipment

• Troubleshooted and repaired electrical issues in a timely manner
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Q1. Current (I) =voltage (V)/Resistance (R)
Ans. 
Ohm's Law states that current is equal to voltage divided by resistance.
• Ohm's Law is a fundamental principle in electrical engineering

• Current (I) is measured in Amperes (A)

• Voltage (V) is measured in Volts (V)

• Resistance (R) is measured in Ohms (Ω)

• The formula I = V/R can be used to calculate current in a circuit
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Q2. What it ohm's law
Ans. 
Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points.
• Ohm's law is represented by the equation V = IR, where V is voltage, I is current, and R is resistance.

• It is named after German physicist Georg Simon Ohm.

• Ohm's law is fundamental in the field of electrical engineering and is used to analyze and design electrical circuits.

• It help...read more
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Q3. SI unit of flux
Ans. 
Weber (Wb)
• The SI unit of flux is Weber (Wb)

• Flux is a measure of the flow of a physical quantity through a surface

• It is commonly used in electromagnetism and is defined as the amount of magnetic field passing through a surface
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Q4. Difference between AC and DC
Ans. 
AC stands for alternating current, which changes direction periodically, while DC stands for direct current, which flows in one direction.
• AC changes direction periodically, while DC flows in one direction constantly.

• AC is used in household appliances and power distribution, while DC is used in batteries and electronic devices.

• AC can be easily converted to different voltage levels using transformers, while DC requires m...read more
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Q5. How will you calculate current carrying in a conductor ?
Ans. 
Current carrying in a conductor can be calculated using Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R).
• Use Ohm's Law: I = V / R

• Determine the voltage across the conductor

• Find the resistance of the conductor

• Calculate the current flowing through the conductor using the formula
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Q1. If there Hazzard is occur so what should we do first
Ans. 
The first thing to do in case of a hazard is to ensure the safety of yourself and others.
• Assess the situation to determine the nature and extent of the hazard.

• Alert others in the vicinity about the hazard.

• Follow safety protocols and procedures to mitigate the hazard.

• Contact emergency services if necessary.

• Evacuate the area if instructed to do so.
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Q2. What should you do when their is no EV
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Q3. Also the DG suddenly stopped
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Q1. What should u do when dg fuel dosnot passess through a enjector
Ans. 
Check for clogs in the fuel line, inspect the injector for damage, clean or replace the injector if necessary.
• Inspect the fuel line for any clogs or blockages

• Check the injector for any damage or malfunction

• Clean the injector using appropriate tools and techniques

• If cleaning doesn't work, consider replacing the injector

• Ensure proper fuel flow and pressure to the injector
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Q2. How van we know earth leacage
Ans. 
Earth leakage can be detected using a residual current device (RCD) or ground fault circuit interrupter (GFCI).
• Earth leakage can be detected by measuring the difference in current between the live and neutral wires in a circuit.

• A residual current device (RCD) or ground fault circuit interrupter (GFCI) can be used to detect earth leakage and quickly disconnect the power supply to prevent electric shock.

• Regular testing o...read more
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Q1. Why are power transformer trip
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Q2. Test off transformer
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Q1. 3phase ac line voltage are not equal ?
Ans. 
Unequal 3-phase AC line voltage can cause various issues in electrical systems.
• Unequal voltage can cause unbalanced loads, leading to overheating and damage to equipment.

• It can also cause voltage drops and affect the performance of motors and other devices.

• Proper monitoring and maintenance can help prevent these issues.

• Possible causes of unequal voltage include faulty wiring, damaged transformers, and unbalanced loads.

• ...read more
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Q2. Stater on but motor not working ?
Ans. 
Possible causes could be faulty motor, broken belt, or tripped overload protection.
• Check if the motor is receiving power and if the starter is functioning properly.

• Inspect the motor for any signs of damage or wear and tear.

• Check the belt for any signs of damage or if it has come off the pulley.

• Check the overload protection to see if it has tripped and needs to be reset.

• If all else fails, consult a professional for furt
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Q1. I am Ajay Kumar ghadai, I am form bhatrak, I have complete my ITI industrial technique institute Bhadrak.2011 ,
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Q2. I am continue in Infosys limited company electrical supervisor post in 5 years experience joining date 2018 to continue Sobha development limited 5 years experience joining date 2013 to 2018
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