ASA Industrial Valves
Valve Knowledge Quiz
Are you ready to test your knowledge about industrial valves? This quiz contains 110 questions that cover various types of valves, their applications, fun
Whether you're a seasoned professional or just starting in the field, this quiz will challenge your understanding and help you learn more about:
- Valve categories
- Flow control mechanisms
- Applications and materials
- Design variations
Which category if valves opens and closes by a 90 degree rotation?
Multi-turn valves
Check valves
Quarter-turn Valves
Specialty valve
To which valve category does the butterfly valve belong?
Multi-turn
Quarter-turn
Check
Specialty
Which of the following categories of valves are generally used for throttling services?
Gate and Plug valves
Plug and Ball valves
Globe and butterfly Valves
Gate and Ball vales
Which of the following valves allows flow through the valve in only direction
Check valve
Regulator Valve
Ball valve
Gate valve
Which of the follwoing is the best definition of the word valve
Machine used to stop the flow of water
Mechanical object used to control the movement of water
Device that controls movement of liquids or gases
Device that prevents the return flow of fluid
Ancient civilization originally designed and used valves to
Divert the flow of water for agricultural and human use
Protect their cities from flooding by changing the course of rivers
Change the landscape to make land more valuable
Operate small machines in factories
Which of the following valves types was first used for on/off services and straight through flow?
Ball valve
Gate valve
Butterfly valve
Pinch Valve
Which of the follwoing valves opens and closes by the circular rotation of the handle?
Check valve
Regulator valve
Globe valve
Plug valve
What determines the type of flow media a valve can handle
The bonnet
Valve type
Valve material
Corrosion resistance
Valve material determines a valve's
End connection
Design
Usefulness
Type
Which of the following valve types is used for on-off services and straight-through flow?
Ball valve
Gate valve
Butterfly valve
Pinch valve
Which of the follwoing valves opens and closes by the cirular rotation of the handle?
Check valve
Regulator valve
Globe valve
Plug valve
All of the following are design variations for the globe valves except
Angle pattern
X pattern
T pattern
Y pattern
To which valve category does the globe valve belong?
Multi-turn
Quarter-turn
Check valve
Specialty valve
All of the following are main parts of diaphragm valves except
Stem
Bonnet
Diaphragm
Body
A customer asks whether gate valves should be used for throttling services. What is your response?
What size do you need?
They should not be used because they have a straight-through design causes erosion and possible corrosion of the closure member(or gate) when put in a partially open/closed position
They can be used if there size of correct
They can be used of the corret design variation is made
Which of the following valves is typically used for precise flow regulation control?
Diaphragm
Globe
Needle
Gate
Which type of diaphragm va;ve body would be needed for an application where the flow media would corrode a metal valve body?
Inverted T
Angle
Lined
Unlined
Which bonnet design provides a tight bonnet joint because the sealing surfaces are not in rubbing contract and a ring reinforces the structure?
Screwed
Bolted
Union
U-bolt
The flat-faced joint is particularly suitable for iron valves which are used for?
Higher temperature and lower pressure application
Lower temperature and higher pressure applications
Lower temperature and lower pressure applications
Higher temperature and higher pressure applications
With hte U-bolt bonnet design, what secure the bonnet to the body?
U-shapped clamp
U-bolt
Union ring
Retaining ring
What type of gate valve provides a visual view of the stem position ot indicate the position of the wedge
Spherical dist
Non-metallic disk
Non-rising stem
Rising stem
Which type of stem would be used for restricted overhead?
Non-rising stem
Rising stem
Plug disc
Metallic disc
The design of the bonnet assembly for the diaphragm valve makes it
Suited for applications of slurries or liquids with large amounts of suspended solids
Particulatly suited to minimize pressure drop
Interchangeable with a globe or gate valve
Easy to replace the diaphragm when necassary.
What is the purpose of the packing
Requires less maintenance because the stem only rotates with no vertical movement
Prevent flow media leakage in the stem area
Prevent flow straight through the valve
Provide a tight seal and closure of the valve
What type of globe valve disc has a tapered surface
Spherical disc
Solid wedge disc
Plug disc
Double parallel wedge disc
What type of disc design is used in needle valves?
Spherical disc
Conical disc
Plug disc
Solid wedge disc
The major types of closure members used on diaphragm valves include all of the following except
Teflon
CPVC
Elastomer
Elsatomer with Teflon
How far must you turn a plug valve to fully open or close the valve
25 Deg or a quarter turn
50 deg or a half turn
90 deg or a quarter turn
100 deg or a full turn
Which of the following is the main purpose of the trunnion ball flanged valve design
Maximum flow capacity
High perfomance
Possitive shutoff
Unobstructed pipeline flow
Which type of valves uses a TGE or Teflon sleeve
Ball
Gate
Lubricated plug valve
Non-lubricated plug valve
How can you tell whether a valve is open or closed
By the position of the indicator mark at the top of the valve
By the position of the indicator mark at the bottom of the valve
By the way the port openings face the inside walls of the valve body
By the wat the port openenigs face the valve end
What is the purpose of using a venturi port plug valve?
To compress the flexible diaphragm against the seat
To provide closure or throttling control
To provide a plug valve shutoff at a low valve price
To allow fluid to flow through the valve
To which valve category does the plug valve belong?
Multi-turn
Quarter-turn
Check
Specialty
All of the following are closing elements on plug valves except?
Tapered
Inverted tapered
Cylindrical
Horizontal
The butterfly valve may be used for
Compressing the flexible diaphragm against the seat
Providing directional flow
Blocking the flow passage
On/off and throttling services
Which of the following valves permit either side of a piping system to be disconnected?
Ball valve
Short-pattern plug valve
Flanged-lugged butterfly vlave
Venturi pattern plug valve
Which of the following is a possible disadvantage of a ball vavle?
The valves greater weight requires more material to make the valve
Reduced flow results in a loss of pressure
A libricant must be used between the plug and valve body walls
The seat material may have temperature limitations
What port pattern has a ball bore euqal to the inside diameter of the pipe
Venturi port
Full port
Regular port
Conventional port
What information does the Cv factor provide?
Flow coefficient
Flow media
Gallons per minute
Pressure
For frequent operation of low pressure steam services and line sizes 2" and under, which type of quarter turn valve is the most economical?
Plug
Ball
Butterfly
Wafer butterfly
Which ball valve design eliminates the possibility of bofy joint leaks?
Three-way, two port design
Two-piece, bottom-entry design
One-piece body, end entry design
One-piece body, top entry design
What type of butterfly valve does not use a gasket to make the end connection?
High performance butterfly
Cast iron flanged valve
Wafer or lug type with resilient sleeves
Wafer butterfly valve
What is the percentage flow if the valve is open 60 deg?
Different percentages per MFG
60%
40%
20%
What is the largest valve opening called?
U-shaped
Full port
Disc
Plug
How many sets of connecting lines can a four-way, four port valve servcice at the same time?
2
4
6
8
What is done prior to attaching a pressure relief vvalve to a valve to relieve pressure
Fluid is forced through the valve
The valve is frequesntly disassembled
A hole is drilled through one side of the plug
The plug is completely removed
All of the following are types of patterns for lubricated plug valves except
Regular
Bolted
Short
Venturi
Which of the following is the best description of the funtion of a check valve
Machine used to stop the flow of water
Object used to control the movement of water
Device that controls movement of liquids or gases
Device that prevents the return flow of fluid
Which of the following is the best description of the function of a check valve?
Machine used to stop the flow of water
Object used to control the movement of water
Device that controls movement of liquids or gases
Device that prevents the
Which of the following is critical to the function of a check valve?
Whether the water is used for agricultural or human use
The position in which it is installed
The material from which it is made
The amount of fluid that passes through the valve
Which if the following valve types is used keep the flow in a system from reversing?
Ball valve
Gate valve
Butterfly valve
Check valve
All of the following are typed of check valves except?
Ball
Swing
Lift
Plug
Which type of valve has a guided disc which slides away from the seat when open?
Wafer check
Vertical lift check
Swing check
Lift check
To which valve category does the globe valve belong?
Multi-turn
Quarter-turn
Check
Specialty
A ball check valve is different from a ball valve because it
Has a hole or port through the middle of it
Does not have a hole or port through the middle of it
Allows pressure to be exerted above the closing element
Has a different type of closure member
Based on what you learned earlier in this course, which of the following categories of valves are generally used for throttling services?
Gate and plug
Globe and butterfly
Globe and gate
Gate and ball
Which of the following valves may be installed in either horizontal or vertical position?
Vertical lift check
Horizontal lift check
Swing check
None of the above
What does the arrow on a check valve indicate?
Whether the valve should be installed horizontally or vertically
The position of the closing element
The correct flow direction
The reverse flow direction
All of the following are typical type of specialty valves except
Pressure relief valve
Safety valve
Temperature valve
Nuclear valve
What is the primary purpose of a reliefe valve
Divert the flow of wate for agricultural and human use
Protect cities from flooding by changing the course or rivers
Ease excess pressure in a piping system or vessel
Operate small machines in factories
What specialty feature on an automatic control vavle makes it different from the more common valve types?
Wedge disc
Ball valve
Pressure relief valve
Power actuator
An actuator is best described as a device which semiautomatically or automatically
Controls the flow of liquid through a pipe system
Activates a valve into action
Assures an unobstructed pipeline flow
Exerts pressure under the closing mechanism
All of the following are advantages of using actuators on valves except
Reduced manpower
Operate larger valve
Cut energy costs
Operate remotely
Which of the following is a special advantage of using a gear actuator on a valve
Allows valve operation with reduced effort
Permits the operation of smaller valves
Automatically opens and closes valves
Uses manual efor to move the valve
To which valve category does the pneumatic actuator belong?
Multi-turn
Quarter-turn
Check
Specialty
Which of the following is the best source for providing information about the valves your company sells
Salespeople
MFG
Supervisors
Counter people
Which of the following is an energy source for a pneumatic actuator?
Electricity
Nuclear power
Compressed air
Solar power
Which of the following devices in a relief and safety valve is used to hold the disc against the seat in normal conditions
Disc
Actuator
Stem
Spring
Valves may be classified in all of the following way except
Type
Material
Substance
Function
When valve material is used to classify valves, the classification generally refers to hte valves
Stem
Body
Trim
Seat ring
The valve's trim includes all of the following except
Stem
Seat ring
Bonnet
Disc
When selecting a valve, why must you also consider the trim material?
It comprises the largest part of the valve
It helps prevent corrosion durring opteration
It is exposed to the flow media and subject to wear durring operation
It is usually made of different material than the body
In what way is the valve catalog literature organized differently for multi-turn and quarter-turn valves?
Multi-turn valves appear first in most MFG catalogs
Multi-turn valves are organized by function
Quarter-turn valves are listed by valve material
Quarter turn valves are organized by valve type
What does the nominal pipe size (NPS) measure
Outside dia. Of the pipe
Length of the pipe
Inside dia. Of the pipe
Width of the pipe
It is important to know the pressure and temperature limits of a valve to
Explain the uses to customers
Prevent unnecessary valve damage or accidents
Properly select the needed valve
Cover the MFG warranty
Which of the following groups writes standards for the chemical and physical properties of valve materials
ASTM international
AMSE american society of mechanical engineers
MSS manufacturers standardization society
AWWA american water works association
What does internation pipe stadards(IPS) define?
Design of the pipe and pipe thread
Size of the pipe and valve end connection
Specifications for pipe and pipe thread
Dimensions of stock pipe
NACE valves conforming to MR-01-75 are different from general purpose valves because they must
Provide pressure control functions
Withstand more rigorous tests
Meet special material requirments
Be standard stock items
All of the following are the reason to select bronze valves except
Low cost
Line size
Availability
Low temperature
Which kind of iron is most often used for valves
Ductile cast iron
Gray cast iron
Malleable cast iron
All iron
Under what temperature conditions would ductile iron serve as a better valve material than cast iorn?
When the application temperature limit exceeds 450 deg but is under 650 deg
When the application tempurature limit esceeds 650 deg
When the application limit is lower than 450 deg
When the application limit is 500 deg
What is the different between IBBM and all iron valve?
IBBM valves are used for marine applications; all-iron valves are not
All-iron valves have carbon steel stem
The trim material of IBBM valves is different from its body
IBBM are a better choice for fluids that could corrode bronze
Which type of valve is frequently used in a marine environment?
Grey cast iron
Steel
Plastic
Ductile iron
All of the following quarter-turn valves ca be made of nodular iron except?
Butterfly
Globe
Plug
Ball
In which of the following conditions should a customer select a forged steel valve?
When low pressure and low temps are involved
When the line size is over nps 2 or nps 2.5
When high pressure and high temps are involved
When low cost is an important consideration
In application where corrosion is a problem, what type of material is frequently used for valves
Cast steel
Stainless steel
Cast iron
Ductile iron
When low cost is important and temps are below 140 deg, which of the following materials are commonly used for valves?
All-iron
Cast steel
Stainless steel
Plastic
What is approximate temp. Limit of a CPVC valve?
140 - 160 deg
160 - 185 deg
185 - 200 deg
185 - 250 deg
Which of the following valve end connections are the least expensive and easy to install?
Grooved end
Brazed end
Flanged end
Treaded end
What type of connections may save time in installation and labor?
Threaded
Grooved
Soldered
Flanged
Which of the following is a benefit of a butterfly to a contractor who installs piping systems?
Lower initial cost for the valve
Longer installation time
Tight gasket seal
Minimal joint maintenance
What type of welding connection would most likely be found on a valve for nps 1 line?
Weld end
Buttweld
Socket welding
Braze welding
Why would a weld connection be used with steel as the valve material?
Avoids hazardous fluid leaks
Lower initial cost
Easier installation process
Permits the use of bronze or iron valves
Although grooved end connections are more costly than threaded connection valves, they must be a better buy becuase grooved end connections
Can be used under any temp and pressure conditon
Have internal taper pipe threads for joining to threaded pipe
Are easier to install which reduces labor costs
Last substantially longer than any other connection
Which type of end connetions are used with normal water distribution pressure system with types K, L , or M copper tubing?
Brazed
Solder
Flanged
Gasket
The types of end connections used on plastic ball valves designed for use in the chemical industry are
Brazed and solder welding
Threaded and socket weld
Buttwelding and socket weld
Weld end and brazed
In specifying a full face gasket needed for a flanged joint, you need to state all of the following except
Type of gasket
Outside dia. Of the gasket
Number of gaskets needed
Total cost for the gaskets
Why does the ASME B16.5 code require that both the raised and flat flange face have a specific roughness
To ensure that the surface is compatible with the gasket
To reduce overall cost of joining the valves
To comply with state and federal regulations
To ensure that the pipe is not over-tightened into the valve
The term "valve temperature pressure limits" is used to describe the
Lowest temp at which a liquid can continue to flow
Maximum pressure the flow media can exert across the valve
Amount of pressure a valve can withstand
Highest temperature at which a liquid can continue to flow
The flow of liquid through a piping system is resisted by fluid particles rubbing against one another and the surface of the pipe. This resistance results in a loss of energy which is called
Pounds per sq. in. (PSI)
Pressure
Pressure drop
Force
The purpose of a pressure class rating schedule is to provide the
Pressure and temperature limits for a given valve
Pressure limits for flanges and fittings
Standards for bronze valves
Flow velocity and pipe dia. Required in a piping system
What is the best way to help a customer solve a valve problem
Check the valve for any obvious defects
Refer the customer to the most experienced person in your business
Get as much information as possible and report the problem to the MFG
Replace the valve with a valve that no reported problems
When overhead space is a problem, which of the following types of valves might be suitable?
Non-rising stem
Butterfly
Ball
Check
Which installation position is best recommended for multi-turn valves
Stem down
Stem up
Stem horizontal
Stem slightly vertical
What problem mgiht result from not providing adequate support for valve line installation
Not enough overhead room
End flange joint leaks
Leaking around the stem area
Inaccessible valves
The standards chart for bornze, iron, and steel valve materials are measured in terms of which of the following?
Temperature
Pressure
Temperature and pressure
Temp, pressure, and longevity
A check valve has a marking that indicates the
Flow direction through the valve in an open position
Pressure measured in the amount of the force exerted
Temp nad pressure rating
Flow direction through the valve in a closed position
How does pressure affect valve material?
The more porous the material, the more pressure can be applied to the valve
The stronger the material, the more pressure can be applied to the valve
Pressure increases as the flow media temperature increases
Pressure makes valve material stronger as the pressure drops
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