AAF International Engineer Trainee Interview Questions and Answers

A UPS block diagram typically consists of input power, rectifier, battery, inverter, output power, and load.

• Input power from utility or generator

• Rectifier converts AC to DC

• Battery stores energy for backup power

• Inverter converts DC to AC

• Output power to connected devices

• Load consumes power from UPS

MOSFET, IGBT, and SCR are all types of power semiconductor devices used for switching applications.

• MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a voltage-controlled device with high switching speed and efficiency.

• IGBT (Insulated Gate Bipolar Transistor) combines the advantages of MOSFET and bipolar transistor, suitable for high power applications.

• SCR (Silicon-Controlled Rectifier) is a current-controll...read more

Seeking new challenges and growth opportunities in a different environment.

• Desire for new challenges and opportunities for growth

• Different work culture and environment

• Opportunity to learn new technologies and skills

• Possibility of career advancement

• Seeking better work-life balance

Chiller and VRF systems differ in their cooling capacity, efficiency, and cost.

• Chillers are better suited for large commercial buildings with high cooling loads.

• VRF systems are more efficient and cost-effective for smaller buildings or individual rooms.

• Chillers use water as a cooling medium, while VRF systems use refrigerant.

• Chillers require more maintenance and have a longer lifespan than VRF systems.

• VRF systems offer...read more