Senior Electrical Maintenance Engineer Interview Questions and Answers

The parallel condition for a transformer is when two or more transformers are connected in parallel to share the load.

• Parallel condition is used to increase the overall capacity of the transformer system.

• In parallel connection, the primary windings of the transformers are connected to the same supply voltage.

• The secondary windings of the transformers are connected together to form a common load.

• Parallel transformers should have the same voltage ratio and phase sequence.

• Parall...read more

Switchgear is an electrical equipment that controls, protects and isolates electrical circuits. HV breaker is a high voltage circuit breaker used in switchgear.

• Switchgear is used to control, protect and isolate electrical circuits

• It includes devices such as circuit breakers, fuses, switches, relays, etc.

• HV breaker is a type of circuit breaker used in switchgear to interrupt high voltage circuits

• It is designed to handle high levels of electrical energy and protect the equipmen...read more

The number of filters in an air screw compressor depends on the model and manufacturer.

• The number of filters can range from one to several depending on the size and capacity of the compressor.

• Filters are used to remove contaminants from the air before it enters the compressor.

• Some compressors may have separate filters for oil and air.

• It is important to regularly clean and replace filters to ensure optimal performance and prevent damage to the compressor.

• The exact number of fi...read more

Drive-in machines are used for efficient and quick loading and unloading of materials.

• Drive-in machines save time and increase productivity.

• They are ideal for warehouses with limited space.

• They allow for high-density storage of materials.

• Examples include drive-in racking systems and drive-in pallet jacks.

A PLC, or Programmable Logic Controller, is a digital computer used for automation of electromechanical processes.

• PLCs are used to control machinery in industries such as manufacturing, automotive, and energy.

• They are programmed using ladder logic or other programming languages.

• PLCs can monitor inputs from sensors and control outputs to actuators.

• They are reliable, durable, and designed to operate in harsh industrial environments.

• Examples of PLC brands include Siemens, Allen-...read more

Automation is the use of control systems and technology to simplify and streamline processes, reducing the need for human intervention.

• Automation involves the use of machines, computers, and robots to perform tasks traditionally done by humans.

• It can improve efficiency, accuracy, and consistency in various industries such as manufacturing, transportation, and healthcare.

• Examples of automation include robotic assembly lines in factories, self-driving cars in transportation, an...read more