BPK Tech Services India Interview Questions and Answers

SLD stands for Single Line Diagram, a graphical representation of electrical system or circuit.

• SLD shows the flow of electricity and the components used in the system

• It is used by engineers to design and analyze electrical systems

• SLD is also used for maintenance and troubleshooting purposes

• Examples of SLD include power distribution systems, lighting systems, and motor control centers

Deep understanding of transformers

• Knowledge of transformer design and operation

• Familiarity with transformer testing and maintenance

• Understanding of transformer losses and efficiency

• Knowledge of transformer protection and control

• Experience with transformer sizing and selection

Industries use various types of motors depending on their requirements.

• AC motors are commonly used in industries for their efficiency and reliability.

• DC motors are used for applications that require variable speed control.

• Servo motors are used for precise control in robotics and automation.

• Stepper motors are used for precise positioning in CNC machines and robotics.

• Brushless DC motors are used in applications that require high power and efficiency.

• Examples of industries that ...read more

There are two types of single phase motors: AC motors and DC motors.

• Single phase AC motors include split-phase motors, capacitor-start motors, and shaded-pole motors.

• Single phase DC motors include universal motors and series motors.

• AC motors are more commonly used in household appliances, while DC motors are used in power tools and small appliances.

• Single phase motors are generally less efficient than three phase motors and are used for smaller applications.

• Single phase motor...read more

Transformer equation relates the primary and secondary voltages and currents of a transformer.

• The transformer equation is V1/V2 = N1/N2 = I2/I1

• V1 and V2 are the primary and secondary voltages respectively

• N1 and N2 are the number of turns in the primary and secondary coils respectively

• I1 and I2 are the primary and secondary currents respectively

• The transformer equation is based on the principle of conservation of energy