Ceat Specialty Tyres Mechanical Maintenance Engineer Interview Questions and Answers

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

A limit switch is a device that is used to detect the presence or absence of an object within a certain range of motion.

• Limit switches are commonly used in industrial applications to control machinery and equipment.

• They consist of an actuator that is mechanically linked to a set of contacts, which are opened or closed depending on the position of the actuator.

• Limit switches can be used to stop the motion of a machine w...read more

Types of cooling used in dies include water cooling, air cooling, and oil cooling.

• Water cooling: uses water to remove heat from the die

• Air cooling: uses air to cool the die

• Oil cooling: uses oil to dissipate heat from the die

Material and hrc of die parts are crucial for determining the durability and performance of the parts.

• Material selection for die parts depends on factors like strength, wear resistance, and thermal conductivity.

• Common materials used for die parts include tool steels like H13, D2, and A2.

• Hardness of die parts is typically measured using Rockwell Hardness Scale (HRC).

• Higher HRC values indicate greater hardness and wear r...read more

Breakdown in dies on machine can be due to wear and tear, misalignment, overheating, or material defects.

• Wear and tear from continuous use can lead to cracks or breakage in the dies.

• Misalignment of the dies can cause them to wear unevenly or break prematurely.

• Overheating of the dies can weaken their structure and lead to failure during operation.

• Material defects in the dies, such as impurities or weak spots, can cause ...read more