10+ Eicher Trucks and Buses Interview Questions and Answers

The question covers power factor of transformer, types of DC machine, working principle of AC alternator, and DC motors.

• Power factor of a transformer is the ratio of real power to apparent power.

• Types of DC machines include DC motors and DC generators.

• AC alternators work on the principle of electromagnetic induction to convert mechanical energy into electrical energy.

• DC motors convert electrical energy into mechanical energy through the interaction of magnetic fields.

Criteria for evaluating cable thickness and length in electrical engineering.

• Consider the current carrying capacity of the cable

• Evaluate the voltage drop over the length of the cable

• Take into account the environmental conditions where the cable will be installed

• Check the insulation material and its thickness

• Ensure the cable length is sufficient for the intended application

The number of workmen needed depends on the size and complexity of the traywork, cable vault, and piperack.

• The number of workmen needed for a 100km traywork in 20 days will vary based on factors such as terrain, weather conditions, and equipment availability.

• For a cable vault, the number of workmen required will depend on the size of the vault, the type of cables being installed, and any specific safety regulations that need to be followed.

• In the case of a piperack, the numbe...read more

CT sizing is done by considering the primary current, burden, and accuracy class of the CT.

• Determine the primary current of the system

• Calculate the burden of the CT

• Select the accuracy class of the CT

• Use the formula: CT rating = primary current x burden / (accuracy class x 100)

• Example: For a 400A primary current, 5VA burden, and 0.5 accuracy class, CT rating = 400 x 5 / (0.5 x 100) = 40A

Earthing procedures involve connecting electrical systems to the ground to prevent electric shock and ensure safety. Earthgrid is a network of interconnected grounding systems.

• Earthing procedures involve connecting electrical systems to the ground using conductors like copper rods or plates.

• The purpose of earthing is to prevent electric shock by providing a path for fault currents to flow safely into the ground.

• Earthgrid is a network of interconnected grounding systems that e...read more

My current payment is $80,000 annually before taxes and $65,000 after taxes.

• My current annual salary is $80,000 before taxes

• After taxes, my take-home pay is $65,000

• I receive a monthly salary of $6,666.67 before taxes

Load list is a document that lists all the electrical loads in a building or facility.

• It includes details such as the name of the load, its location, power rating, and voltage requirements.

• Load list is used to determine the total power demand of the building and to design the electrical system accordingly.

• It is also used for maintenance and troubleshooting purposes.

• Examples of loads that may be included in a load list are lighting fixtures, HVAC systems, elevators, and motors...read more

Differential relays are typically located at the ends of a protected zone.

• Differential relays are used to detect faults within a protected zone

• They compare the current entering and leaving the zone

• If there is a difference, it indicates a fault

• The relay is typically located at the end of the zone closest to the source

• This allows for the quickest detection and isolation of faults

RPM stands for Revolutions Per Minute.

• RPM stands for Revolutions Per Minute

• It is a unit of rotational speed

• Commonly used in the context of engines, motors, and other rotating machinery

Core branch refers to the fundamental or main area of study within a particular field.

• It is the primary area of focus within a field of study

• It encompasses the foundational concepts and principles

• Examples include core branches of engineering such as electrical, mechanical, and civil

• Core branches of medicine include cardiology, neurology, and oncology

There are various types of motors including DC motors, AC motors, stepper motors, and servo motors.

• DC motors: used in applications where speed control is important, such as in electric vehicles.

• AC motors: commonly used in household appliances and industrial machinery.

• Stepper motors: used in applications requiring precise position control, like 3D printers.

• Servo motors: used in robotics and automation for accurate control of position and speed.

An induction motor works by using electromagnetic induction to generate a rotating magnetic field.

• An induction motor consists of a stator and a rotor.

• The stator has a set of windings that are connected to an AC power source.

• When the AC power is applied, it creates a rotating magnetic field in the stator.

• The rotating magnetic field induces currents in the rotor windings, which in turn creates a magnetic field in the rotor.

• The interaction between the stator and rotor magnetic f...read more

Cable dressing is the process of organizing and securing cables in a neat and efficient manner to improve safety and aesthetics.

• Cable dressing involves arranging cables in a way that minimizes interference and maximizes airflow.

• It helps in identifying and tracing cables easily for maintenance or troubleshooting.

• Proper cable dressing can prevent cable damage and reduce the risk of electrical hazards.

• Examples of cable dressing techniques include using cable ties, cable trays, a...read more

Earthing is the process of connecting electrical systems to the ground to prevent electric shock and protect equipment.

• Earthing provides a path for fault currents to flow safely into the ground.

• It helps in stabilizing voltage levels and protecting against lightning strikes.

• Earthing is essential for safety in electrical systems to prevent electric shocks.

• Examples of earthing systems include grounding rods, grounding plates, and grounding wires.

Provide details about a specific topic or project.

• Include background information

• Explain the purpose or goal

• Discuss the methods or techniques used

• Present the results or outcomes

• Highlight any challenges faced and how they were overcome

Seeking new challenges and opportunities for growth in a dynamic work environment.

• Desire to work on more complex projects

• Opportunity for career advancement

• Seeking a company with a strong focus on innovation

• Relocation to a new city or country

• Better work-life balance