Larsen & Toubro Limited Electrician Interview Questions and Answers

Q1. Electrical mentenanc work experience
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Q2. ElCB full form and MCB full form
Ans. 
ELCB stands for Earth Leakage Circuit Breaker and MCB stands for Miniature Circuit Breaker.
• ELCB is a safety device used to protect against electrical shock caused by earth faults.

• MCB is a type of circuit breaker that automatically switches off electrical circuits during abnormal conditions.

• ELCB detects current leakage to earth and disconnects the circuit, while MCB protects against overloads and short circuits.
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Q3. Earth leakeg circuit breaker and menutur current breaker
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Q4. ElCB sefty protection
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Q5. MCB over load protection
Ans. 
MCB (Miniature Circuit Breaker) provides overload protection by automatically switching off the circuit when current exceeds the rated capacity.
• MCB trips when current exceeds its rated capacity to prevent overheating and potential fire hazards.

• Overload protection is essential to protect electrical appliances and wiring from damage.

• Examples of MCB overload protection include tripping when too many devices are connected ...read more
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Q6. ElCB earth leakage protection
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Q1. Cable glad & try working paping etc
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Q2. Cable poling panel alamet busbar
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Q1. Plc working and shefty
Ans. When the power goes off the machine switches off automatically.this requires you restart the machine, when the power is back
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Q2. Electrical VPR Settings
Ans. Electrical panel is provided with VPR for protection during under voltage and over voltage . This voltage protection relay is characterized by its trip interval of 0.2to 10 second.
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Q3. Electrical panel with braking system
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An electrical panel with a braking system is a safety feature that automatically stops the flow of electricity in case of an emergency or malfunction.
• The braking system in an electrical panel is designed to prevent electrical accidents and protect both people and equipment.

• It works by detecting abnormal conditions such as short circuits, overloads, or ground faults, and immediately cutting off the power supply.

• This hel...read more
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Q1. About swich yard
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Q2. About vfd panal and star delta motars
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Q3. About Earthing and electrod
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Q4. About Earthing Matt by G.I. flats
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Q5. About construction power
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Q6. About baching plant
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Glanding termination

Sefty test safety code