What is force balance and motions balance principle ?
What does a transmitter output stantfrom 3-15psi or (0.2 - 1 Kg/Cm2) or 4 - 20 m.a. etc ?
What are Intrinsically safe system ?
What is feed back control ? What is feed forward control ? Discuss its application ?
What is Furnace Draft control ?
Explain ratio control system.
Explain Cascade Control system with a diagram. What would happier if a single controller were used?
Why does control valve operate at LSpsi ?
Where is an Air to close and Air to open control valves used ? AIR TO CLOSE :
An operator tells you that a control valve in a steech ? How wiil you stent checking ?
How will you select the control valve characteristics ?
How will you change the action of a control valve ?
How will you change the valve characteristics with positioner ?
What is a solenoid valve ? Where it is used ?
What are the different valve characteristic ?
What are the different types of plugs ?
What are the advantages of comflex valves ?
What is a cage valve ?
What is the use of three way valves ?
What is the use of butterfly valves ?
Wh at is th e use of Angle valves ?
What is the use of booster relays ?
What is the use of link connected to the valve positioner ?
When can a by pass be not used on a positioner ?
What is the use of a valve positioner ?