FUN 1 EO: 1.62 - Radiation Protection Tech.

FUN 1 EO: 1.62

1 / 25

What are the different types of valve stems?

Spherical and cylindrical stems

Hand wheels and motor operators

Globe valves and gate valves

Rising stems and non-rising stems

2 / 25

What is the main advantage of a ball valve?

It offers precise flow control and throttling capability

It has a compact and lightweight design

It provides quick and reliable shut-off with minimal pressure drop

It is suitable for high-temperature applications

3 / 25

What is the primary function of a valve?

Relieving component or piping over pressure

Regulating downstream system or process pressure

Controlling the flow of fluid and pressure within a system or process

Varying the amount of fluid flow

4 / 25

What type of motion does a butterfly valve utilize?

Reciprocating motion

Linear motion

Oscillating motion

Rotational motion

5 / 25

How does a centrifugal pump convert velocity head to static pressure?

By rotating the impeller to generate centrifugal force

By using check valves in the suction and discharge ports

By gradually increasing the flow area in the volute

By compressing the packing material in the pump casing

6 / 25

What is the main difference between positive displacement pumps and centrifugal pumps?

Positive displacement pumps deliver a constant volume of liquid per cycle, while centrifugal pumps deliver a continuous flow.

Positive displacement pumps are suitable for high-pressure applications, while centrifugal pumps are more compact.

Positive displacement pumps utilize rotational motion, while centrifugal pumps utilize linear motion.

Positive displacement pumps require a higher power input compared to centrifugal pumps.

7 / 25

What are the three basic categories of positive displacement pumps?

Centrifugal pumps, axial flow pumps, and mixed flow pumps

Gate valves, globe valves, and ball valves

Spherical valves, cylindrical valves, and plug valves

Reciprocating pumps, rotary pumps, and diaphragm pumps

8 / 25

What are the internal elements of a valve collectively referred to as?

Valve actuator

Valve packing

Valve body

Valve trim

9 / 25

What is the purpose of the valve body?

To provide a framework for holding everything together

To control the direction of fluid flow

To serve as the primary pressure boundary of the valve assembly

To vary the amount of fluid flow

10 / 25

What is the function of a plug valve?

To regulate downstream system pressure

To start or stop fluid flow

To control the direction of fluid flow

To relieve component or piping over pressure

11 / 25

What are some advantages of a gate valve?

It is less prone to vibration in the partially open state compared to other valves

It is more compact and lightweight than other valve types

It is suitable for throttling applications and offers good flow control

It provides a tight seal when closed and offers little resistance to flow when open

12 / 25

What is the purpose of a valve actuator?

To control the flow and pressure within the system

To operate the stem and disk assembly

To provide a tight seal between the valve body and bonnet

To prevent leakage between the valve trim and bonnet

13 / 25

What is the function of the pump casing in a centrifugal pump?

To provide a pressure boundary and direct the flow of the liquid

To regulate the speed and size of the impeller

To prevent leakage between the suction and discharge ports

To support the pump internals and accessories

14 / 25

What are the basic parts of a valve?

Body, bonnet, trim, actuator, and packing

Gate, globe, ball, plug, and butterfly

Pressure boundary, trim, and sealing surface

Disk, seat, stem, and sleeves

15 / 25

What is the main drawback of a gate valve?

It is prone to vibration in the partially open state

It has a higher head loss compared to other valves

It is not suitable for throttling applications

It requires lapping and grinding for repairs

16 / 25

What is the bonnet of a valve?

The cover for the opening in the valve body

The component that controls the stem and disk assembly

The internal elements of a valve

The primary pressure boundary of the valve

17 / 25

What is the purpose of the valve stem?

To provide a tight seal between the stem and bonnet

To connect the valve to the actuator

To allow for the throttling of fluid flow

To position the disk of the valve

18 / 25

What is the main advantage of a globe valve?

It is suitable for high-pressure applications

It can start, stop, and regulate fluid flow

It offers low head loss and high flow capacity

It has a simple and compact design

19 / 25

What is commonly used as packing material in valves?

Hard-surfaced seal rings

Forged and machined disk and seat

Flange gaskets and stem packing gland

Fibrous material or compounds like Teflon

20 / 25

What determines the volume of liquid delivered by a positive displacement pump?

The type of power unit driving the pump

The pressure in the pump casing

The pump speed and discharge resistance

The size and shape of the impeller

21 / 25

What is a diaphragm valve used for?

To relieve over pressure in the system

To control the direction of fluid flow

To provide a tight seal and prevent leakage

To regulate flow by adjusting the position of a flexible diaphragm

22 / 25

What is the function of the valve trim?

To provide a tight seal when the valve is closed

To determine the valve's performance and control flow

To connect the actuator and disk of the valve

To prevent leakage between the stem and bonnet of the valve

23 / 25

What is the purpose of a check valve?

To regulate downstream system pressure

To vary the amount of fluid flow

To prevent backflow of fluid in a system

To relieve component or piping over pressure

24 / 25

What are the disk and seat of a valve responsible for?

Relieving over pressure in the system

Controlling the direction of fluid flow

Regulating downstream system pressure

Permitting and prohibiting fluid flow

25 / 25

How does a globe valve regulate flow?

By adjusting the position of the bonnet

By gradually closing the disk against the seat

By controlling the direction of fluid flow

By fully opening the disk in the direction of flow

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