Tega Industries Junior Engineer - Maintenance Interview Questions and Answers

Boiler efficiency can be calculated by measuring the heat input and heat output of the boiler.

• Calculate the heat input by measuring the fuel flow rate, fuel calorific value, and fuel consumption.

• Calculate the heat output by measuring the steam flow rate and steam enthalpy.

• Direct efficiency = (Heat output / Heat input) * 100%

• Indirect efficiency = Direct efficiency * Boiler efficiency of other components (like economizer

The monthly maintenance cost of my section is approximately $10,000.

• The monthly maintenance cost includes expenses for spare parts, labor, equipment rental, and utilities.

• Regular maintenance tasks such as lubrication, inspections, and repairs contribute to the overall cost.

• Cost may vary depending on the size of the section, age of equipment, and frequency of maintenance activities.

Maintenance is the process of ensuring that equipment, machinery, or systems are kept in good working condition to prevent breakdowns and prolong their lifespan.

• Regular inspections and repairs are conducted to identify and address any issues before they escalate.

• Preventive maintenance schedules are created to proactively maintain equipment and prevent unexpected failures.

• Corrective maintenance is performed to fix issue...read more

An induction motor starts when a rotating magnetic field is created by the stator winding, inducing current in the rotor.

• Induction motors start by using the principle of electromagnetic induction.

• The stator winding is energized with a three-phase AC current, creating a rotating magnetic field.

• This rotating magnetic field induces a current in the rotor, which in turn creates a magnetic field.

• The interaction between the ...read more

Synchronisation of generator involves aligning the speed and phase of the generator with the grid before connecting them. Motor protection and maintenance are crucial for ensuring the longevity and efficiency of the motor.

• Synchronisation of generator involves matching the frequency, voltage, and phase angle of the generator with the grid before connecting them.

• Motor protection includes measures such as overload protect...read more