ASTRA Technician Interview Questions and Answers

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Q1. Transformer basic parts and explain.?
Ans. 
Transformer basic parts include primary winding, secondary winding, core, and insulation.
• Primary winding: where the input voltage is applied

• Secondary winding: where the output voltage is induced

• Core: provides a path for magnetic flux

• Insulation: prevents short circuits between windings

• Example: A step-up transformer has more turns in the secondary winding to increase voltage
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Q2. What is UPS and explain there parts and working.?
Ans. 
UPS stands for Uninterruptible Power Supply. It is a device that provides emergency power to a load when the input power source fails.
• UPS has three main parts: battery, inverter, and rectifier.

• The battery stores energy and provides power during outages.

• The rectifier converts AC power to DC power to charge the battery.

• The inverter converts DC power from the battery to AC power for the load.

• UPS ensures continuous power s...read more
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Q3. What are the safety Equpment's.?
Ans. 
Safety equipment includes personal protective gear such as gloves, goggles, helmets, and safety harnesses.
• Gloves

• Goggles

• Helmets

• Safety harnesses
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Q4. Maintenance of electrical panels ?
Ans. 
Maintenance of electrical panels involves regular inspection, cleaning, and testing to ensure proper functioning.
• Regularly inspecting panels for signs of wear or damage

• Cleaning panels to remove dust and debris that can cause overheating

• Testing panels to ensure all components are functioning correctly

• Replacing any faulty components or wiring as needed

• Following manufacturer's guidelines for maintenance schedules and proc
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Q5. What are the Types circuit breakers?
Ans. 
Types of circuit breakers include thermal, magnetic, and hybrid.
• Thermal circuit breakers operate based on temperature rise caused by excess current.

• Magnetic circuit breakers operate based on the strength of the magnetic field created by excess current.

• Hybrid circuit breakers combine features of both thermal and magnetic types.

• Other types include oil circuit breakers, air circuit breakers, and vacuum circuit breakers.
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Q6. Single line diagram OR block diagram of UPS
Ans. 
A single line diagram of a UPS shows the electrical connections and components in a simplified manner.
• Shows the main components of the UPS system in a single line format

• Includes the input power source, battery, inverter, and output load

• Helps in understanding the flow of electricity within the UPS system
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Q7. Difference between inverter and Ups.?
Ans. 
Inverter converts DC power to AC power, while UPS provides backup power during outages.
• Inverter converts DC power from a battery or solar panels to AC power for household appliances.

• UPS (Uninterruptible Power Supply) provides backup power during outages to keep devices running.

• Inverters are commonly used in solar power systems, while UPS systems are used in data centers and critical infrastructure.

• Inverters are typical...read more
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