Ch 5 Valves Test Review

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