Bosch Rexroth India ITI Electrician Interview Questions and Answers

Q1. Types of mcb and functions
Ans. 
MCB stands for Miniature Circuit Breaker. Types include single pole, double pole, triple pole, and four pole. Functions include overcurrent protection and short circuit protection.
• Types of MCBs: single pole, double pole, triple pole, four pole

• Functions: overcurrent protection, short circuit protection

• Examples: Single pole MCB for individual circuits, four pole MCB for three-phase circuits
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Q1. Tell me about yourself
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Q1. Which insulation is necessary for proper function and basic protection?
Ans. 
Thermal insulation is necessary for proper function and basic protection.
• Thermal insulation helps regulate temperature and prevent heat loss or gain.

• Common types of insulation include fiberglass, foam, and cellulose.

• Insulation is used in buildings, vehicles, and various industrial applications.

• Examples of insulation materials include fiberglass batts, spray foam, and mineral wool.

• Proper insulation improves energy effic
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Q2. What is the expansion ECC?
Ans. 
ECC stands for Error Correction Code, which is a method used to detect and correct errors in data transmission.
• ECC is commonly used in computer memory and storage devices to ensure data integrity.

• It works by adding extra bits to the data being transmitted, which can be used to detect and correct errors.

• There are different types of ECC, such as Single Error Correction Double Error Detection (SECDED) and Triple Error Cor
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Q3. Which type MCBs suitable for halogen lamps?
Ans. 
Type B MCBs are suitable for halogen lamps.
• Type B MCBs have a characteristic curve that allows for a short-term surge in current, which is common in halogen lamps.

• Type C and D MCBs may trip too quickly and cause nuisance tripping.

• It is important to check the wattage and voltage of the halogen lamp to ensure the correct MCB is selected.

• Examples of Type B MCBs include Schneider Electric Acti 9 iK60N and ABB S 200 series.
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What is the square root of 0.017?

Q1. What is the megger reading in a dead short wiring installation?
Ans. 
A dead short wiring installation will have a megger reading of zero.
• A dead short is a complete circuit with no resistance.

• A megger is used to measure insulation resistance.

• In a dead short, there is no insulation resistance to measure.

• Therefore, the megger reading will be zero.
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Q1. What is the function of expenshon valve
Ans. 
The expansion valve regulates the flow of refrigerant into the evaporator, controlling the cooling effect of the air conditioning system.
• Regulates refrigerant flow into the evaporator

• Controls cooling effect of AC system

• Maintains proper pressure and temperature levels

• Helps to improve energy efficiency

• Examples: thermostatic expansion valve, electronic expansion valve
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