Project Trainee Engineer Interview Questions and Answers for Freshers

PLC stands for Programmable Logic Controller and DCS stands for Distributed Control System. They are used in industrial automation.

• PLC is a digital computer used for automation of electromechanical processes.

• DCS is a control system used to control multiple variables and processes across a large area.

• PLC is more suitable for discrete manufacturing processes while DCS is used in continuous processes.

• PLC programming languages include ladder logic, function block diagram, and str...read more

PLC programming language is ladder logic. It uses graphical representation of relay logic circuits.

• Ladder logic is the most commonly used programming language for PLCs.

• It uses graphical representation of relay logic circuits.

• Example: A simple logic could be turning on a motor when a sensor detects an object.

IC engine is an internal combustion engine while CI engine is a compression ignition engine.

• IC engine works on the principle of internal combustion of fuel while CI engine works on the principle of compression ignition of fuel.

• IC engine is commonly used in cars, motorcycles, and small aircraft while CI engine is commonly used in heavy-duty vehicles like trucks and buses.

• IC engine uses spark plugs to ignite the fuel while CI engine uses high compression to ignite the fuel.

• IC e...read more

VFD controls the speed of an AC motor by varying the frequency of the electrical supply. Servo motor uses feedback to control the position and speed of the motor.

• VFD stands for Variable Frequency Drive

• VFD controls the speed of an AC motor by adjusting the frequency of the electrical supply

• Servo motor uses feedback from an encoder to accurately control the position and speed of the motor

• Servo motors are used in robotics, CNC machines, and automation systems

IC and SI engines are types of internal combustion engines used in vehicles and machinery.

• IC engine stands for internal combustion engine, which uses fuel combustion to generate power.

• SI engine stands for spark ignition engine, which uses a spark plug to ignite the fuel-air mixture.

• IC engines are commonly used in cars, trucks, and motorcycles.

• SI engines are commonly used in gasoline-powered vehicles.

• Both types of engines are used in various types of machinery and equipment.

• IC...read more