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Instrument Mechanic Practice Test: Final Control Elements
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Instrument Mechanic Practice Test: Final Control Elements
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25 Questions

1. Which of the following valve is known as safety valve?
2. Which valve is used when a straight line of fluid and minimum restriction is required ?
3. AFR stands for ;
4. A 5/2 Way single solenoid valve has;
5. Cavitation in a control valve is caused by :
6. Which of the following types of valve uses a flow control element that involves moving a flexible material into or against an orifice ?
7. Which of the following is used to stop the water supplies when required?
8. Which actuator gives linear and rotational capability?
9. What is the purpose of Pinch valve?
10. ___________ is an electromechanically operated valve.
11. A ____________ restricts air flow.
12. The ______ is the most commonly used disk within a gate valve , because of its simplicity and strength.
13. Which of these are usually not preferred for frequent operation?
14. Which type of valve is preferred for vacuum applications?
15. An air to open control valve assembly may be formed with which of these actuator/valve body:
16. What is the purpose of piston valve?
17. The gate valves are made of ___________ with brass mountings.
18. Which is not a controlling element?
19. ___________ actuator powered by a motor which convert mechanical energy into torque.
20. Of the below mentioned valves which of the following are used to control the flow of liquid in a single direction?
21. Which of the following valves are used in high duty cycle applications?
22. Which valve can be used in the service to handle fluids and gases and at the same time can be used for throttling as well?
23. Actuator converts
24. ____________ valves are used to remove sand and slit from the pipelines.
25. What is the function of a butterfly valve?

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