JRG Automotive india Electrical and Mechanical Maintenance Engineer Interview Questions and Answers

Plus and minus points refer to the advantages and disadvantages of a particular situation or decision.

• Plus points can include benefits, advantages, strengths, or positive aspects of a situation.

• Minus points can include drawbacks, disadvantages, weaknesses, or negative aspects of a situation.

• For example, in a production engineering role, a plus point could be the opportunity to work with cutting-edge technology, while a...read more

I worked as a Service Engineer at XYZ Company.

• Performed regular maintenance and repairs on various types of equipment.

• Diagnosed and resolved technical issues reported by customers.

• Provided on-site support and training to clients.

• Collaborated with cross-functional teams to develop and implement new service strategies.

• Maintained accurate records of service activities and documentation.

• Received positive feedback from clie

SMPS is a power supply that uses high-frequency switching to convert AC voltage to DC voltage.

• SMPS is more efficient than traditional linear power supplies

• It uses a switching regulator to control the output voltage

• SMPS can be found in computers, TVs, and other electronic devices

• It can be designed to work with different input voltages and frequencies

HMI is the interface between a human operator and a machine that allows for control and monitoring of the machine's functions.

• HMI is used in various industries such as manufacturing, transportation, and energy

• It includes components such as touchscreens, buttons, and indicators

• HMI can display real-time data and provide alerts for potential issues

• Examples of HMI include the dashboard in a car and the control panel in a f

MTBF is Mean Time Between Failures and MTTR is Mean Time To Repair.

• MTBF is the average time between two consecutive failures of a system or component.

• MTTR is the average time taken to repair a failed system or component.

• MTBF and MTTR are important metrics in maintenance engineering to measure system reliability and availability.

• MTBF can be calculated by dividing the total operating time by the number of failures.

• MTTR c...read more

There are generally 4 types of maintenance: corrective, preventive, predictive, and condition-based.

• Corrective maintenance involves fixing a problem after it has occurred.

• Preventive maintenance involves scheduled maintenance to prevent problems from occurring.

• Predictive maintenance involves using data and analytics to predict when maintenance is needed.

• Condition-based maintenance involves monitoring equipment and perfo...read more

A relay is an electrically operated switch that uses an electromagnet to mechanically control the switching action.

• Relays are used to control high power circuits with low power signals.

• They can be used to control motors, lights, and other electrical devices.

• Relays have an input coil that generates a magnetic field when current flows through it.

• This magnetic field attracts a movable armature, which closes or opens the s...read more

Switches are used instead of relays in some domestic applications due to their smaller size, lower cost, and faster response time.

• Switches are smaller in size compared to relays, making them more suitable for compact domestic appliances.

• Switches are generally less expensive than relays, making them a cost-effective choice for domestic applications.

• Switches have a faster response time compared to relays, allowing for qu...read more

A relay is an electrically operated switch that uses an electromagnet to mechanically control the switching action.

• Relays are commonly used in electrical systems to control high-power devices with low-power signals.

• They consist of a coil, an armature, and a set of contacts.

• When the coil is energized, the armature moves and closes or opens the contacts, allowing or interrupting the flow of current.

• Relays are used in var...read more

Yes, I know the manufacturing procedure of relays.

• Relays are electromechanical devices used to control the flow of electricity in a circuit.

• The manufacturing procedure involves several steps such as designing, prototyping, testing, and mass production.

• Designing includes selecting the appropriate materials, determining the specifications, and creating the circuit diagram.

• Prototyping involves creating a working model to ...read more

Yes, epoxy is commonly used in relays for its insulating and adhesive properties.

• Epoxy is a type of resin that can be used as an adhesive or coating.

• In relays, epoxy is often used to encapsulate and protect the internal components.

• It provides insulation and helps to prevent moisture or dust from entering the relay.

• Epoxy can also improve the mechanical strength and stability of the relay.

• For example, epoxy is used in au...read more

The material used for relay contact soldering is typically silver or silver alloy.

• Silver or silver alloy is commonly used for relay contact soldering due to its high electrical conductivity and low resistance.

• Silver solder has a lower melting point compared to other solder materials, making it suitable for delicate electronic components.

• The use of silver or silver alloy solder helps ensure reliable and efficient electr...read more

Relays are used in various real-time applications for controlling electrical circuits.

• Industrial automation: Relays are used to control motors, pumps, and other industrial equipment.

• Power distribution: Relays are used in power grids to control the flow of electricity and protect against overloads.

• Automotive industry: Relays are used in vehicles for controlling headlights, wipers, and other electrical systems.

• Telecommun...read more

My previous company was a leading manufacturing firm specializing in automotive components.

• Company focused on producing high-quality automotive parts

• Utilized advanced technology and machinery for production

• Had a strong emphasis on continuous improvement and efficiency

• Worked closely with major automotive companies such as Toyota and Honda

My salary is competitive and based on my experience, skills, and the industry standard.

• My salary is based on my experience in the field.

• It also takes into account my skills and qualifications.

• I ensure that my salary is in line with the industry standard.

• I am open to negotiation based on the job responsibilities and benefits offered.

Star delta starter is a type of reduced voltage starter used in induction motors to reduce starting current.

• Consists of two contactors - one for star connection and one for delta connection

• Initially motor is started in star connection to reduce starting current

• After a set time, motor is switched to delta connection for full speed operation

• Used in applications where high starting current can damage equipment

To use a third party device in a PLC, you need to establish communication protocols and configure the PLC to send and receive data from the device.

• Identify the communication protocol supported by the third party device (e.g. Modbus, Profibus)

• Configure the PLC to communicate with the third party device using the identified protocol

• Map the data points between the PLC and the third party device to ensure seamless data exc...read more

The eddy current formula calculates the magnitude of induced currents in a conductor due to a changing magnetic field.

• The formula is given by: I = π * D * f * B * σ

• Where I is the eddy current (A)

• D is the diameter of the coil (m)

• f is the frequency of the magnetic field (Hz)

• B is the magnetic field strength (T)

• σ is the conductivity of the material (S/m)

To improve the power factor of a 130 kW load with a power factor of 0.7, capacitors can be used. The required rating of the capacitor depends on the desired power factor improvement.

• Install capacitors in parallel with the load to improve power factor

• Calculate the required capacitance using the formula: C = (P * tan(acos(pf))) / (V^2)

• Choose capacitors with the appropriate voltage and capacitance rating for the load

• Ensur...read more

I have a strong background in maintenance engineering and a proven track record of improving efficiency and reducing downtime.

• Extensive experience in troubleshooting and repairing mechanical and electrical systems

• Proven ability to implement preventive maintenance programs to increase equipment reliability

• Strong communication skills to work effectively with cross-functional teams

• Certified in relevant maintenance enginee

Questions related to maintenance engineering including eddy current, 5S TPM, electromagnetic induction, RPM measurement, DC motor, shift handover, major breakdown, and star delta starter.

• Eddy current is a current induced in a conductor due to a changing magnetic field

• 5S TPM is a methodology for workplace organization and standardization

• Electromagnetic induction is the production of an electromotive force across a condu...read more