Oman National Engineering & Investment Company Electrical Technician Interview Questions and Answers

Electrical department all Technical questions and General averness questions in MCQ type

Q1. Electrical all Technical questions
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Q2. 1.Types of Transformer 2.Types of Electrical Drives 3. What is the frequence of India 4. What is your goal
Ans. 
Types of transformers include power transformers, distribution transformers, instrument transformers. Types of electrical drives include AC drives, DC drives, servo drives.
• Power transformers are used in high voltage transmission and distribution systems.

• Distribution transformers are used to step down voltage for use in homes and businesses.

• Instrument transformers are used for measuring voltage and current in power syst...read more
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Q1. 1. Tell me about yourself 2. What is your greatest strength 3. Why do you want to work here 4. Why should we choose you
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Q1. Acb vcb transformer
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Q1. What is slip ring
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A slip ring is an electrical component used to transfer power and electrical signals from a stationary to a rotating structure.
• Allows for continuous rotation without tangling wires

• Commonly used in electromechanical systems like motors, generators, and wind turbines

• Consists of stationary brushes and rotating conductive rings

• Helps in transmitting power, data, and signals across rotating interfaces
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Q2. What is oer unit slip
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Unit slip is the difference between synchronous speed and rotor speed in an induction motor.
• Unit slip is expressed as a fraction or percentage.

• It is used to calculate the rotor speed of an induction motor.

• Unit slip is necessary for determining the torque and efficiency of the motor.

• For example, if the synchronous speed of a motor is 1800 RPM and the rotor speed is 1750 RPM, the unit slip would be 0.0278 or 2.78%.
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Q1. Tell me about yourself
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Q2. What is your family background
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Conduct Theoretical Test.

Practical Test and group dissertation with electrical

Q1. What is the 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)

• Voltage is measured in Volts (V)

• Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance
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Q2. Types of motor ?
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Types of motors include AC motors, DC motors, synchronous motors, asynchronous motors, stepper motors, and servo motors.
• AC motors: Alternating current motors commonly used in household appliances and industrial applications.

• DC motors: Direct current motors used in applications where speed control is important.

• Synchronous motors: Maintain a constant speed and are used in applications like clocks and timers.

• Asynchronous ...read more
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Q3. AC or DC different?
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AC and DC are two types of electrical current with different characteristics and applications.
• AC stands for alternating current, which periodically changes direction and magnitude.

• DC stands for direct current, which flows in one direction at a constant voltage.

• AC is commonly used in household appliances and power distribution systems.

• DC is often used in electronics, such as batteries and computer power supplies.
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Q1. Electrical work nolej
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Q2. Electrical site nolej
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Q1. How many types of dg check And 4
Ans. 
There are four types of DG (Diesel Generator) checks: daily, weekly, monthly, and annual.
• Daily check involves inspecting fuel levels, oil levels, coolant levels, and battery condition.

• Weekly check includes checking for any leaks, testing the battery, and verifying the operation of safety features.

• Monthly check involves cleaning the air filter, checking the exhaust system, and testing the automatic transfer switch.

• Annua...read more
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Q2. How many types of sencer And 5
Ans. 
There are many types of sensors used in electrical systems, including temperature sensors, pressure sensors, proximity sensors, etc.
• Temperature sensors

• Pressure sensors

• Proximity sensors

• Motion sensors

• Light sensors
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Q1. What is the three-phase voltage?
Ans. 
Three-phase voltage is a type of electrical power transmission that utilizes three alternating currents.
• Three-phase voltage consists of three alternating currents that are 120 degrees out of phase with each other.

• It is commonly used in industrial and commercial applications for its efficiency and power distribution capabilities.

• The voltage levels for three-phase systems can vary depending on the application, with commo...read more
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Q2. What is the process for entering single-phase voltage?
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The process for entering single-phase voltage involves connecting the voltage source to the load through a single conductor.
• Connect the single-phase voltage source to the load through a single conductor

• Ensure proper insulation and grounding for safety

• Check the voltage level using a multimeter before connecting the load

• Make sure the load is compatible with the voltage rating
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