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WorksheetsStatic Equipment - Valve
Total questions: 15
Worksheet time: 8mins
What is the function of a NRV valve?
Start-stop flow
Prevent backflow
Prevent excessive pressure
Change flow direction
Which type of valve is used for On/Off service and has improved sealing?
Needle Valve
Globe Valve
Butterfly Valve
Gate Valve
What is the primary function of a Ball Valve?
Control pressure
Quick opening
Control flow
Prevent backflow
Which valve is suitable for regulation of flow and often used on low pressure duty?
Needle Valve
Diaphragm Valve
Butterfly Valve
Plug Valve
What is the purpose of a Globe Valve?
Control liquid pressure
Control flow rate
Quick action valve
Low Pressure Drop
What type of valve cannot see the stem because it is covered by the bonnet?
Swing Check Valve
Quick Opening Valve
Non-Rising Stem (IS)
Rising Stem (OS&Y)
Which type of valve rotates 90 degrees to open and close?
Butterfly Valve
Ball Valve
Globe Valve
Gate Valve
What type of valve allows only one direction of flow and is not suitable to install vertically?
Relief Valve
Spring Check Valve
Safety Valve
Swing Check Valve
Which type of valve is primarily used for liquid service and opens in proportion to the pressure increase over the opening pressure?
Balanced Or Bellow
Safety Relief Valve
Safety Valve
Relief Valve
What type of valve is characterized by rapid opening or pop action and is normally used for steam or air?
Safety Relief Valve
Safety Valve
Balanced Or Bellow
Relief Valve
Which type of valve is used primarily for both services (liquid and steam/air) and has the bonnet vented to the discharge side of the valve?
Relief Valve
Safety Valve
Balanced Or Bellow
Safety Relief Valve
What is a common issue in valve maintenance related to abnormal noise?
From vibrated pipelines
From loosened bolting
From the valve itself
From gland area
What is a recommended maintenance activity for manual valves related to packing replacement?
Cut the gland packing 90 degree incline
Select improper tool when removing gland packing
Replace every periodic inspection
Replace every 2 to 3 years
What should be done before disassembling a valve from the pipeline during maintenance activities?
Apply lubricant and leave for a while
Remove rust and soil
Prepare new parts such as gland packing and gaskets
Clean using water, steam, acid or solvent
What should be done after reassembling a valve during packing replacement activities?
Tighten until leakage stops
Fully open and close for several times
Check using tube inspector & flashlight
Load gland packing to full depth of the packing chamber
