1. What is the primary purpose of a ball valve?
Choose the correct option that best describes the primary function of a ball valve.
Explanation: The primary purpose of a ball valve is for fully open/closed applications, making option C the correct answer.
2. In which type of applications are ball valves well-suited?
Select the options that correctly describe the recommended uses of ball valves.
Explanation: Options A (Fully open/closed applications) and B (Limited throttling applications) are the recommended uses of ball valves.
3. What is a disadvantage of ball valves?
Identify the correct disadvantage associated with the use of ball valves.
Explanation: The correct disadvantage of ball valves is poor throttling characteristics, making option B the correct answer.
4. How is manual operation achieved in a ball valve?
Choose the correct method used for manual operation of ball valves.
Explanation: Manual operation of a ball valve is accomplished through a quarter-turn handle, making option B the correct answer.
5. What type of actuators can be used to automate ball valves?
Select the correct options regarding the automation of ball valves.
Explanation: Pneumatic and electric actuators can be used to automate ball valves, making options B and C the correct answers.
6. Why are ball valves not suitable for applications that require precise flow control?
Identify the specific reason why ball valves are not recommended for applications requiring precise flow control.
Explanation: The correct reason is poor throttling characteristics, making option B the correct answer.
7. In what type of applications should ball valves not be used?
Identify the specific application for which ball valves are not suitable.
Explanation: Ball valves should not be used for applications requiring precise flow control, making option C the correct answer.
Short Article on Basics of Ball Valves
Ball Valves
Ball valves are a type of valve that uses a sphere (ball) to control the flow of fluid. They are characterized by their low cost, high capacity, low leakage, and tight sealing. Ball valves are ideal for fully open/closed applications, as well as limited throttling applications. They are also well-suited for higher temperature fluids and slurries.
Recommended uses:
- Fully open/closed applications
- Limited throttling applications
- Higher temperature fluids
Applications:
- Most liquids
- High temperatures
- Slurries
Advantages:
- Low cost
- High capacity
- Low leakage
- Tight sealing with low torque
Disadvantages:
- Poor throttling characteristics
- Prone to cavitation
Manual operation is accomplished through a quarter-turn handle. Pneumatic and electric actuators can be used to automate ball valves.
Ball valves are a popular choice for a variety of applications due to their many advantages. However, it is important to note that they are not suitable for all applications. For example, they should not be used for applications that require precise flow control.
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