valves Flashcards
(26 cards)
What is a valve?
A valve is a device that regulates, directs, or controls the flow of fluids by opening, closing, or partially obstructing passageways.
True or False: Valves can be used in both liquid and gas applications.
True
Fill in the blank: The primary function of a valve is to __________ the flow of fluid.
control
What are the two main types of valves?
Linear and rotary valves.
Which type of valve uses a disk to control flow?
Gate valve
What type of valve is typically used to prevent backflow?
Check valve
Multiple Choice: Which of the following is not a type of valve? A) Ball valve B) Butterfly valve C) Cylinder valve
C) Cylinder valve
What is the purpose of a pressure relief valve?
To release excess pressure from a system.
True or False: A globe valve is used primarily for on-off control.
False
What is the advantage of a ball valve compared to other types?
Ball valves provide a tight seal and can be opened or closed quickly.
Fill in the blank: A __________ valve allows for throttling and flow control.
globe
What type of actuator is commonly used with valves?
Electric or pneumatic actuators.
Multiple Choice: Which valve type is best suited for high-pressure applications? A) Gate valve B) Ball valve C) Check valve
B) Ball valve
What is a solenoid valve?
A valve that is operated by an electromagnetic solenoid.
True or False: Valves are only used in plumbing systems.
False
What is the main difference between a gate valve and a globe valve?
Gate valves are used for on/off control, while globe valves are used for throttling.
Fill in the blank: The __________ valve is designed to open automatically when the pressure in the system exceeds a preset limit.
pressure relief
What is the function of a butterfly valve?
To regulate flow with a rotating disc that pivots in the center.
Multiple Choice: Which valve is commonly used in HVAC systems? A) Check valve B) Butterfly valve C) Needle valve
B) Butterfly valve
What does the term ‘valve seat’ refer to?
The surface against which the valve closure element seals.
True or False: Valves can be manually operated or automated.
True
What is a knife gate valve used for?
To cut through thick fluids or slurries.
Fill in the blank: A __________ valve is often used for precise flow control in small diameter pipes.
needle
What is the function of a flow control valve?
To regulate the flow rate of fluid in a system.
