Mahindra & Mahindra Mechanical Maintenance Fitter Interview Questions and Answers

A circuit breaker is an electrical switch that automatically interrupts the flow of current when it exceeds a certain limit.

• It is used to protect electrical circuits from damage caused by overloading or short circuits.

• It works by detecting the excess current and tripping the switch to break the circuit.

• It can be reset manually or automatically depending on the type of circuit breaker.

• Examples include thermal circuit br...read more

A contactor is an electrical switch used for switching an electrical circuit on or off.

• It is used to control electric motors, lighting, heating, and other electrical loads.

• It consists of a coil, contacts, and an enclosure.

• The coil generates a magnetic field that pulls the contacts together to close the circuit.

• Examples include HVAC systems, elevators, and industrial machinery.

• Contactor ratings are based on the amount o...read more

MCB stands for Miniature Circuit Breaker. It is an electrical switch that automatically shuts off the electrical circuit during an overload or short circuit.

• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

• It is designed to protect electrical circuits from damage caused by overloading or short circuits.

• MCBs are available in different current ratings and can be easily replac...read more

A motor is a device that converts electrical energy into mechanical energy to produce motion.

• Motors are used in various applications such as electric vehicles, industrial machinery, and household appliances.

• There are different types of motors such as DC motors, AC motors, stepper motors, and servo motors.

• The basic principle of a motor is the interaction between a magnetic field and an electric current.

• Examples of motor...read more

A current transformer is a device that measures the current flowing in a circuit by producing a proportional current in its secondary winding.

• Consists of a primary winding and a secondary winding

• Primary winding is connected in series with the circuit carrying the current to be measured

• Secondary winding is connected to a measuring instrument or protective relay

• Produces a current in the secondary winding that is proporti...read more

Yes, I am aware of electronics architectures of commercial vehicles.

• I have experience working with CAN (Controller Area Network) bus systems.

• I am familiar with the various electronic control units (ECUs) used in commercial vehicles.

• I understand the importance of proper wiring and grounding in electronic systems.

• I have knowledge of diagnostic tools and software used for troubleshooting electronic issues.

• I am aware of th...read more

Brakes are required in vehicles to slow down or stop the vehicle when necessary.

• Brakes help to prevent accidents by allowing the driver to slow down or stop the vehicle when necessary

• They also help to maintain control of the vehicle while driving

• Different types of brakes include disc brakes, drum brakes, and anti-lock brakes

• Regular maintenance of brakes is important to ensure they are functioning properly

Ackerman angle is the angle formed between the steering axis and a line drawn through the center of the wheel.

• It is used in the design of steering systems for vehicles.

• It helps to determine the turning radius of a vehicle.

• The angle varies depending on the type of vehicle and its intended use.

• A larger Ackerman angle is used for vehicles that require tighter turning radius, such as go-karts.

• A smaller Ackerman angle is us...read more

There are various types of electrical motors and transformers, each with their own unique wiring diagrams.

• Types of electrical motors include AC motors, DC motors, stepper motors, and servo motors.

• Transformers can be step-up, step-down, isolation, autotransformers, etc.

• Wiring diagrams vary depending on the specific motor or transformer being used.

• AC motors typically have a capacitor and a start winding in their wiring d...read more