Aarch Solutions Interview Questions and Answers

Answers to questions related to induction machine and power transmission

• Induction machine works on the principle of electromagnetic induction

• Flux is induced in the rotor of the induction machine due to the rotating magnetic field produced by the stator

• Infinite bus is a hypothetical bus with infinite power capacity and voltage

• If load is suddenly changed in infinite bus, the voltage and frequency will change

• High voltage is considered in transmission to reduce power losses due t...read more

The DT market in India and the technical aspects of DT procured by Indian Utilities.

• The DT market in India refers to the market for Distribution Transformers in the country.

• Indian Utilities procure Distribution Transformers (DT) for their power distribution networks.

• Technical aspects of DT include specifications such as power rating, voltage ratio, insulation class, cooling type, etc.

• DTs are designed to step down the voltage from the transmission level to the distribution lev...read more

The adoption of Chinese technology in the Indian market by bulk customers is a possibility.

• Chinese technology offers competitive pricing, which can attract bulk customers in the Indian market.

• Chinese technology companies have a wide range of products and solutions that cater to the needs of bulk customers.

• Chinese technology has been successful in other markets, indicating its potential for adoption in the Indian market.

• Bulk customers may prioritize cost-effectiveness over oth...read more

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers work on the principle of electromagnetic induction.

• They consist of two or more coils of wire, known as windings, which are wound around a common magnetic core.

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

• When an alternating current (AC) flows through the primary ...read more

Materials required for bracket fabrication include metal sheets, welding rods, grinding wheels, and polishing compounds.

• Metal sheets of appropriate thickness and size

• Welding rods for joining the brackets

• Grinding wheels for shaping and smoothing the brackets

• Polishing compounds for finishing the brackets

• Protective gear such as gloves and goggles

• Tools such as a welding machine, grinder, and polisher

Tests for Bay wise protection scheme include primary injection test, secondary injection test, and relay coordination test.

• Primary injection test to verify the correct operation of primary protection relays

• Secondary injection test to verify the correct operation of secondary protection relays

• Relay coordination test to ensure proper coordination between different relays in the scheme

Each department has its own specific procedures to ensure efficient production.

• The production department is responsible for creating and assembling the final product.

• The quality control department ensures that the product meets the required standards.

• The maintenance department is responsible for keeping the machinery and equipment in good working condition.

• The logistics department handles the transportation and delivery of the finished product.

• The research and development dep...read more