Service Maintenance Engineer Interview Questions and Answers

Corona loss in electrical network is the loss of power due to the ionization of air surrounding high voltage conductors.

• Corona loss occurs when the electric field around a conductor is high enough to ionize the air, creating a conductive path and causing power loss.

• It is more prominent at high voltages and frequencies, leading to audible noise, radio interference, and power loss.

• Corona loss can be reduced by increasing conductor size, spacing between conductors, or using coro...read more

Transformers work on the principle of electromagnetic induction, with losses including copper losses and core losses.

• Transformers work on the principle of electromagnetic induction, where a changing magnetic field induces a voltage in a coil.

• Copper losses occur due to resistance in the windings, leading to heat generation.

• Core losses include hysteresis losses (energy lost due to magnetization and demagnetization of the core material) and eddy current losses (energy lost due t...read more

A synchronous motor is a type of AC motor in which the rotation of the shaft is synchronized with the frequency of the supply current.

• Synchronous motors operate at a constant speed determined by the frequency of the electrical supply.

• They are used in applications where precise speed control is required, such as in industrial processes and power generation.

• Synchronous motors are more efficient than induction motors at higher speeds.

• Examples of synchronous motors include brushl...read more

A circuit is a closed loop of electrical components, while a network is a collection of interconnected circuits.

• Circuit is a closed loop of electrical components that allows current to flow.

• Network is a collection of interconnected circuits that work together to perform a specific function.

• Circuits can be simple, like a light bulb connected to a battery, or complex, like a computer motherboard.

• Networks can be local, like a home Wi-Fi network, or global, like the internet.

1 inch = 25.4 mm

• 1 inch is equal to 25.4 millimeters

• This conversion is commonly used in engineering and manufacturing

• For example, a bolt with a diameter of 1 inch is equivalent to 25.4 millimeters