L&T Construction Electrical Site Engineer Interview Questions and Answers

Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics, and electromagnetism.

• Involves designing, developing, testing, and supervising the production of electrical equipment and systems

• Includes working with power generation, transmission, distribution, and utilization

• Incorporates knowledge of electronics, electromagnetism, and computer systems

• Applies princi...read more

The principle of motor involves converting electrical energy into mechanical energy to produce motion.

• Motors operate based on the principle of electromagnetic induction

• Electric current flowing through a wire in a magnetic field creates a force that causes the wire to move

• This movement is harnessed to produce mechanical energy and drive motion

• Examples include DC motors, AC motors, and stepper motors

An electric shock is a sudden discharge of electricity through a person's body, causing injury or even death.

• An electric shock occurs when a person comes into contact with a source of electricity.

• The severity of an electric shock depends on the voltage, current, and duration of exposure.

• Symptoms of an electric shock can range from mild tingling to muscle contractions and burns.

• Examples of sources of electric shock incl...read more

To protect oneself from an electric shock, one should follow safety precautions and use proper equipment.

• Always turn off the power source before working on electrical equipment

• Use insulated tools and wear rubber gloves when working with live wires

• Avoid working in wet conditions or with wet hands

• Install Ground Fault Circuit Interrupters (GFCIs) in areas where water is present

• Regularly inspect and maintain electrical equ...read more

Resistance connected to a source voltage in series will affect the current flowing through the circuit.

• Increases the total resistance in the circuit

• Decreases the total current flowing through the circuit

• Causes a voltage drop across the resistor

• Can be calculated using Ohm's Law: V = I * R

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is represented by the formula: V = I * R, where V is the voltage, I is the current, and R is the resistance.

• It helps in calculating the current, voltage, or resistance in a circuit when the other two values are known.

• Ohm's law is...read more