Control Valve Basics Quiz

Identify this valve?

Control Valves

Bell
Ball
Glove
Rounds

Which of these motions best describes how valves are actuated?

Exponential and rotary
Linearly and round
Linear and rotary
Oscillating and rotar

Identify this valve?

Control Valves

Diaphragm
Bladder
Ball
Plunger

How many common types of valve actuator are there?

4
2
1
3

Identify this valve?

Control Valves

Planet
World
Globe
Globulus
Ball
Gate

What is the main purpose of a valve?

Regulate (throttle) flow
Start and stop flow
Start, stop and circulate flow
Start, stop and regulate (throttle) flow

Identify this valve:

Control Valves

Door
Gate
Window
Drawbridge
Globe
Ball

How do valves get their names?

Valves are typically named after the disc design they use
Valves are typically named after the body design they use
Valves are typically named after the stem design they use
Valves are typically named after the actuator design they use

Identify this valve:

Control Valves

Pump
Globe
Plug
Ball
Plain

Which of these sentences best describes the concept of ‘response time’?

The time a valve requires to move from the throttled to fully open, or fully closed position.
The time a valve requires to correctly regulate flow.
The time a valve requires to move from the fully open to fully closed position, or vice versa.
The time a valve requires to begin moving after receiving a signal to move.

Identify this valve:

Control Valves

Butterfly
Insect
Bird
Pigeon
Ball
Globe

Which of these is not a main valve component?

Stem
Disc
Body
Arm
Actuator

The term “throttling” refers to:

A valve operating with a high level of vibration.
Regulation of fluid flow by partially closing/opening of the valve.

Which of the following IS a type of valve actuator?

Hydraulic actuator.
Pneumatic actuator.
Electric actuator.
Mechanical actuator.
All these options.

What are the advantages of diaphragm valves?

*There may be more than one answer.

Compact size, easy to install and require no maintenance
Suitable for corrosive or contaminated fluid applications because of the few parts exposed to the working fluid.
Can be used for regulating the fluid flow.

There are four main globe valve design types. Which

of the listed options is NOT a type of globe valve?

Control Valve

Straight-flow type.
Angle-flow type.
Cross-flow type.
Y-flow type.
Laminar-flow type.

Concerning globe valves, which of the following statements is NOT true?

There is good sealing between the seat and disk because the valve disk is positioned at a right angle to the valve seat.
Globe valves are often installed with the system pressure on the underside of the valve seat. This reduces the sealing arrangement’s exposure to system pressure and thus increases its useful working life.
Large globe valves require more power to operate and can be noisy when used for high pressure applications.
Globe valves are lighter and more compact than all other valve types.

Identify the valve shown in the image:

Control Valves

Safety valve
Non-return valve (check valve)
Ball valve
Quick relief valve

Identify the valve shown in the image:

Control Valves

Pinch valve.
Punch valve.
Gate valve.
Globe valve.

Pinch valves are inexpensive and have a simple design. Concerning pinch valves, which of the following statements is NOT true?

Pinch valves cannot be used to regulate flow.
There is a very low pressure drop when a pinch valve is fully open.
Pinch valves are well suited for applications where corrosive and contaminated liquids are present in the system.
Pinch valves are well suited for handling fluids that contain a large amount of suspended solids.

Select the statement that best describes

the valve shown in the image:

Control Valves

Swing check valves are designed to prevent flow reversal. Any reversal in flow will close the valve. Closure is accomplished using a counterweight mechanism, backpressure, or by a spring.
Plug valves are rotary motion valves used to start and stop flow. The name is derived from the shape of the disk which resembles a plug.
Piston check valves allow flow in only one direction and belong to the check (non-return) valve group. Closure is accomplished with a piston.

Concerning needle valves, which of the following statements is true?

Needle valves are used to make relatively fine adjustments to the amount of flow.
A distinguishing characteristic of a needle valve is the long tapered point at the end of the valve stem (the ‘needle’).
The needle acts as a disk.
The end of the needle is smaller than the valve seat orifice, which allows it to pass through the orifice before it fully seats. This arrangement allows for a very gradual increase and decrease of fluid flow through the valve.
Needle valves are frequently used as metering valves because the number of handwheel turns directly correlates to the flow rate.
All statements are true.

Relief and safety valves prevent equipment damage by relieving system overpressure. Which of the statements shown best describes a relief valve’s operation?

A relief valve gradually opens as the system pressure increases above a defined setpoint. The valve only opens enough to relieve the overpressure condition.
A relief valve opens fully as soon as the setpoint pressure is reached. It remains fully open until the pressure drops below the reset pressure.

Relief and safety valves prevent equipment damage

by relieving system overpressure.

Can you identify the valve shown in the image?

Control Valve

Safety valve.
Relief valve.

Relief and safety valves prevent equipment damage by relieving system overpressure. Select the statement that best describes a safety valve’s function:

A safety valve gradually opens as the system pressure increases above a defined setpoint. The valve only opens enough to relieve the system overpressure condition.
A safety valve opens fully as soon as the setpoint pressure is reached. It remains fully open until the pressure drops below the reset pressure.

With reference to solenoid valves, which of the following statements is NOT true?

Solenoid valves are electromechanically operated valves.
Solenoid valves are well suited for regulating flow.
An electromagnet will actuate the valve when electrical current is applied.
A spring will actuate the valve when electrical current is no longer present.

The internal components of a valve are also referred to as the:

Set.
Trim.
Assembly.
Interior.

What is the type of actuator shown in the image?

Control valve

Hydraulic actuator.
Pneumatic actuator.
Electrical actuator.
Mechanical actuator.

Which option best describes the ‘length of travel’:

The distance a fluid travels when passing from the inlet to the outlet side of the valve.
The distance a valve disk travels when moving from the fully open to fully closed position (or vice versa).
The distance the valve handle rotates on a rotary valve (the circumference of the handle’s arc is calculated then multiplied by a constant of 0.25).
The distance a valve travels from the factory to the point of use.

Concerning butterfly valves, which of the following statements is NOT true?

Butterfly valves are well suited for start, stop and regulating of fluid flow.
Butterfly valves offer a saving in weight, size and cost, compared to many other types of valve.
Butterfly valves are ‘thin’, relatively easy to install and replace, and have low maintenance costs.
Butterfly valves have a high pressure drop and tend to form gas pockets.
Butterfly valves are well suited for handling slurries and liquids with a large amount of suspended solids.

Gate valves are one of the simplest valve designs, they are used for fully open and fully closed applications, but not for regulating flow. There are two types of gate valve design based upon the disc used, select the correct two designs:

Inclined disc gate valves.
Parallel disc gate valves.
Perpendicular disc gate valves.
Particular disc gate valves.

Gate valves are classified as ‘rising stem’ or ‘non-rising stem’.

Which valve design is shown in the image?

control valve

Non-rising.
Rising.

If using a globe valve in a steam system, what is the correct way to install the valve?

Steam should be applied on the lower side of the disc so that the bonnet packing gland will not be constantly exposed to the system pressure.
Steam should be applied on the upper side of the disc so that the valve disc does not lift when the valve is closed and the stem cools.

Which of these components is NOT a component of a pinch valve?

Sleeve.
Cartilage.
Cartridge.
End plate.

What are the advantages of a pinch valve?

*There may be more than one correct answer

Low pressure drop.
Cheap.
Few components.
Unlikely to leak.
Well suited for vacuum systems.
Well suited for slurry applications

What type of valve is shown in the image?

Control Valve

Gate
Globe
Ball
Piston
Solenoid

Some valve types are not well suited for regulating fluid flow (throttling), why is this?

*There may be more than one correct answer to this question.

Regulating fluid flow by partially opening/closing the valve causes high velocity flow which can cause wear on the disc and seat.
Regulating fluid flow causes a flow restriction, which should always be avoided.
Regulating fluid flow causes a flow restriction, which should always be avoided.
Regulating fluid flow by partially opening/closing the valve causes high velocity flow which increases turbulence.

What type of actuator is shown in the image?

control Valve

Pneumatic.
Electrical.
Hydraulic.
Mechanical.

What type of valve is shown in the image?

control Valve

Punch valve.
Needle valve.
Pointer valve.
Pin valve.

A ball valve’s advantages include:

*There may be more than one correct answer to this question.

Low pressure drop.
Fast acting.
Reduced chance of leakage (soft seat made from Teflon or similar material).
Very well suited for high temperatures.
Cheap.
Suitable for fluid flow regulating/throttling.

Quiz Summary

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Results

Results

Categories

1. Question

Identify this valve?

2. Question

3. Question

Identify this valve?

4. Question

Hint

5. Question

Identify this valve?

6. Question

7. Question

Identify this valve:

8. Question

9. Question

Identify this valve:

10. Question

11. Question

Identify this valve:

12. Question

13. Question

14. Question

Hint

15. Question

16. Question

There are four main globe valve design types. Which

of the listed options is NOT a type of globe valve?

17. Question

18. Question

Identify the valve shown in the image:

19. Question

Identify the valve shown in the image:

20. Question

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