Power Electronics Objective Questions
Power Electronics Objective Questions 1. Questions & Answers on Diodes The P-N Junction Power Diode - Part 1 Power Diode - Part 2 Types of Power Diodes - Part 1…
What is Contactor ?
To start up and shut down a three-phase AC induction motor, any three-pole switch with a suitable current rating will suffice. Simply closing such a switch to send three-phase power…
Solenoid Valve’s Energized or De-energized State ?
Solenoid valves may be used in such a way that they spend most of their time de-energized, energizing only for brief periods of time when some special function is required.…
What is a 4-way Solenoid Valve?
When a pneumatic actuator requires air pressure applied to two different ports in order to move two different directions (such as the case for cylinders lacking a return spring), the…
What is a 3-way Solenoid Valve ?
3-way solenoid valves operate in a manner analogous to single-pole double-throw (SPDT) electrical switches: with two paths for flow sharing one common terminal. 3-way solenoid valves have three ports for…
What is a 2-way Solenoid Valve ?
2-way solenoid valves operate in a manner analogous to single-pole single-throw (SPST) electrical switches: with only one path for flow. Solenoid valve symbols often appear identical to fluid power valve…
Functional Testing of Control Valve Positioners
Valves, the actuators that move them, and the electronic circuits that control them, are all subject to aging soon after they are installed. Valve seats wear from repeated seatings and…
Control Valve Installation, Maintenance, Disassembly & Reassembly
Control Valve Installation, Maintenance, Disassembly & Reassembly A. INSTALLATION 1. Valve Body: Set control valve in the horizontal line of piping in an accessible location with the arrow on the…
PID Controller Loop Tuning Questions and Answers – Part 2
PID Controller Loop Tuning Questions and Answers 1. Examine this process trend showing the PV, SP, and Output of a loop controller: Based on what you see here, determine the following:…
PID Controller Loop Tuning Questions and Answers – Part 1
This article provides PID controller loop tuning conditions for different conditions to analyze Process Variable, Set Point and Controller Output trends. PID Controller Loop Tuning Questions and Answers 1. Examine this…
