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VALVE TRAINING

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Valve Overview

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1. What is the primary function of a valve?
Increase fluid pressure Regulate, direct, and control fluid flow Cool fluid in the system Prevent any fluid movement
2. Which factors are the most when selecting a valve for an industry?
Price and ease of installation Corrosion resistance, abrasion resistance, pressure and temperature handling Color and brand of the valve Number of turns required to open and close
3. What is the main difference a manual and an actuated valve?
A manual valve operates with a motor, while an actuated valve operates with a lever An actuated valve is always larger than a manual valve A manual valve requires human intervention, whereas an actuated valve can be remotely controlled An actuated valve cannot be used for corrosive fluids
4. Why are stainless steel (316) and Duplex materials preferred for some valves?
They are the cheapest materials available They are lighter than other materials They provide excellent corrosion and temperature resistance They require no maintenance
5. What is the main characteristic of a gate valve that makes it unsuitable for flow control?
It is designed for full open or full close positions only It is always motorized and cannot be manually operated It cannot handle high pressure It is only available in one type of material
6. What types of valves are mainly used for flow regulation?
Gate Valve, Ball Valve, Plug Valve Globe Valve, Needle Valve, Butterfly Valve, Diaphragm Valve Check Valve, Relief Valve, Plug Valve Knife Gate Valve, Swing Check Valve, Piston Valve
7. What impact does a valve’s opening motion have on its operation?
A rotary motion allows progressive opening, while a linear motion is usually all-or-nothing The type of motion has no effect on valve performance A quarter-turn valve is always more precise than a linear valve Linear motion valves are only used for low-pressure fluids
8. What is a major disadvantage of butterfly valves?
They cannot be used for liquid fluids They require a large installation space Their disc is always in contact with the fluid, causing turbulence and cavitation They can only be used for very high-pressure applications
9. What is the primary role of a check valve in a piping system?
Prevent reverse flow of the fluid Precisely regulate the flow Completely block the flow to avoid leaks Release accumulated pressure in the system
10. Why are diaphragm valves commonly used in pharmaceutical and food industries?
They provide excellent sealing and prevent fluid contamination They are the cheapest valve option available They can withstand extremely high pressures They require no maintenance
11. Which types of valves are primarily used for isolation?
Globe Valve, Needle Valve Butterfly Valve, Diaphragm Valve Gate Valve, Ball Valve, Plug Valve Relief Valve, Check Valve
12. Which type of valve operates using a quarter-turn motion?
Globe Valve Gate Valve Butterfly Valve Diaphragm Valve
13. What is a major disadvantage of gate valves?
They are expensive and require frequent maintenance They cannot be used for flow control They cannot handle high pressures They are ineffective at sealing
14. Which type of valve is most suitable for abrasive fluids?
Butterfly Valve Pinch Valve Check Valve Globe Valve
15. What is the main function of an actuator in a valve system?
Increase fluid pressure Convert electrical energy into motion Automate valve opening and closing Reduce fluid temperature
16. What are the primary methods of connecting valves to a piping system?
Flanged, Threaded, Socket Weld, Butt Weld Clipped, Magnetic, Threaded, Electronic Screwed, Glued, Riveted, Bolted Electric, Pneumatic, Hydraulic, Mechanical
17. What is the main role of a relief valve?
Increase pressure in a system Protect equipment from overpressure situations Prevent reverse fluid flow Remove air from the pipeline
18. What are the three main types of valve opening motions?
Flanged, Threaded, Welded Rotary, Linear, Quarter-Turn Gate, Ball, Butterfly Electric, Pneumatic, Hydraulic
19. What is one of the main disadvantages of globe valves?
They are slow to operate They cause high pressure loss due to fluid redirection They cannot be used with corrosive fluids They can only function at low temperatures
20. Which component inside an actuator helps ensure smooth motion and reduces wear?
Pinion Rack Bearing Solenoid