Emami Paper Mills Electrician Interview Questions and Answers

Bearings are mechanical components that reduce friction between moving parts.

• Bearings support the load and allow for smooth rotation or linear movement.

• They reduce friction and wear between moving parts.

• Bearings come in various types such as ball bearings, roller bearings, and plain bearings.

• Ball bearings use balls to separate the moving parts and are commonly used in applications like motors and wheels.

• Roller bearings...read more

To identify a problem in a running machine bearing, one can listen for abnormal noises, check for excessive vibration, monitor temperature, and inspect for wear or damage.

• Listen for abnormal noises such as grinding, squeaking, or knocking sounds.

• Check for excessive vibration in the machine or bearing housing.

• Monitor the temperature of the bearing using an infrared thermometer or thermal imaging camera.

• Inspect the beari...read more

To identify problems in gearbox, fans, and blowers, one can perform visual inspections, listen for abnormal noises, check for vibrations, monitor temperature, and conduct performance tests.

• Perform visual inspections to check for any signs of wear, damage, or leaks.

• Listen for abnormal noises such as grinding, rattling, or whining sounds.

• Check for vibrations in the gearbox, fans, or blowers, which may indicate misalignme...read more

An induction motor works by inducing a magnetic field in the rotor through electromagnetic induction.

• The stator creates a rotating magnetic field

• This induces a current in the rotor, creating a magnetic field

• The interaction of the two fields causes the rotor to rotate

• Induction motors are commonly used in industrial and residential applications

DC motors use direct current to produce rotational motion while induction motors use alternating current and electromagnetic induction.

• DC motors have a commutator and brushes while induction motors do not.

• DC motors have a constant speed while induction motors have a variable speed.

• DC motors are more efficient at low speeds while induction motors are more efficient at high speeds.

• DC motors are commonly used in small app...read more

Arc welding machine is operated by connecting the electrode holder to the positive terminal and the workpiece to the negative terminal.

• Ensure the machine is turned off before connecting the cables.

• Select the appropriate electrode for the material being welded.

• Adjust the amperage according to the thickness of the material.

• Hold the electrode holder at a 90-degree angle to the workpiece.

• Strike an arc by tapping the electr...read more

AHU should be worked until the desired temperature and humidity levels are achieved.

• Check the temperature and humidity levels required for the space being served by the AHU.

• Adjust the AHU settings to achieve the desired temperature and humidity levels.

• Monitor the AHU performance to ensure it is maintaining the desired levels.

• Perform regular maintenance on the AHU to keep it functioning properly.

• Consult with a licensed ...read more