WorksheetsCh 5 Valves Test Review
Total questions: 12
Worksheet time: 6mins
What type of valve is a positive shutoff valve that utilizes a gate or guillotine which, when moved between two seats, causes a tight shutoff?
Butterfly
Globe
Gate
Check
Which type of valve is NOT intended for throttling?
A) Butterfly
B) Plug
C) Gate
D) Globe
Which of the following is NOT a type of check valve used to control the direction of flow and prevent process fluid contamination or damage to equipment caused by backflow?
A) Ball check valves
B) Swing check valves
C) Plug check valves
D) Lift check valves
What type of valve is a device that uses a flow control element shaped like a hollowed-out ball, attached to an external handle, to control flow?
Diaphragm
Plug
Ball
Butterfly
What safety device is designed to open slowly gradually if the pressure of a liquid in a closed space exceeds a preset limit?
Safety valve
Block valve
Relief valve
Pop valve
Which of the following is a correct statement about safety valves and relief valves?
A) Relief valves have a larger exhaust port.
B) Safety valves have a quicker response time.
C) Safety valves are only used to relieve pressures from a liquid.
D) Safety and relief valves are exactly the same
Which of the following is one of the most common valve problem conditions that a process technician may need to investigate?
Damage to valve seat
Valve stem seizure
Throttling
Pluggage
What should you do if you find pluggage in a small bleed or drain?
Use a rod-out tool to clear the pluggage.
Contact the maintenance department.
Remove the valve and its associated piping from service.
Contact a supervisor.
Which of the following is a cause of leakage?
Erosion
Vibration
Corrosion
All of the above
Which of the following improper operations can cause off-specification product due to improper flows?
Throttling a valve that is not designed for throttling
Improper closing of a valve on a high-pressure line
Failure to wear proper protective equipment
Failure to clean and lubricate valve stems
Where is the most obvious place to look for leaks and corrosion?
Valve stem
Valve body
Dampers
Bonnets
Which of the following improper operations can cause valve internal leakage?
Failure to clean and lubricate valve stems
Improper closing of a valve on a high-pressure line
Failure to wear proper protective equipment
Throttling a valve that is not designed for throttling
