Oracle Interview Questions and Answers

Servo motors are used for precise control and positioning, while induction motors are used for high power applications.

• Servo motors are typically used in applications where precise control and positioning are required, such as robotics and CNC machines.

• Induction motors are commonly used in high power applications like industrial machinery and HVAC systems.

• Servo motors have a higher cost compared to induction motors due to their precision and control capabilities.

• Induction mot...read more

Single phase has one live wire and one neutral wire, while three phase has three live wires and one neutral wire.

• Single phase has a sinusoidal waveform, while three phase has three sinusoidal waveforms with a phase difference of 120 degrees.

• Single phase is commonly used in residential buildings for lighting and small appliances, while three phase is used in industrial applications for heavy machinery.

• Single phase systems have lower power capacity compared to three phase syste...read more

PNP and NPN are types of sensors used in industrial automation to detect the presence or absence of an object.

• PNP sensors source positive voltage to the output

• NPN sensors sink negative voltage to the output

• PNP sensors are commonly used in North America and NPN sensors are commonly used in Europe and Asia

• Examples: Inductive proximity sensors, photoelectric sensors

A service motor works by converting electrical energy into mechanical energy to drive a machine or equipment.

• Service motors use electromagnetic fields to create motion

• They consist of a stator (stationary part) and a rotor (rotating part)

• Common types include AC motors and DC motors

• Examples include electric fans, washing machine motors, and industrial machinery motors

Servo motors are used for precise control of position, velocity, and acceleration in various applications.

• Provide precise control of position, velocity, and acceleration

• Highly accurate and repeatable movements

• Used in robotics, CNC machines, 3D printers, etc.