FUN 1 EO: 1.62 - Radiation Protection Tech.

FUN 1 EO: 1.62

1 / 25

What is the function of the valve trim?

To provide a tight seal when the valve is closed

To prevent leakage between the stem and bonnet of the valve

To determine the valve's performance and control flow

To connect the actuator and disk of the valve

2 / 25

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

To prevent leakage between the suction and discharge ports

To support the pump internals and accessories

To regulate the speed and size of the impeller

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

3 / 25

What is the primary function of a valve?

Varying the amount of fluid flow

Regulating downstream system or process pressure

Relieving component or piping over pressure

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

4 / 25

What is the main advantage of a globe valve?

It is suitable for high-pressure applications

It has a simple and compact design

It can start, stop, and regulate fluid flow

It offers low head loss and high flow capacity

5 / 25

What is the main drawback of a gate valve?

It requires lapping and grinding for repairs

It has a higher head loss compared to other valves

It is not suitable for throttling applications

It is prone to vibration in the partially open state

6 / 25

What are the basic parts of a valve?

Body, bonnet, trim, actuator, and packing

Pressure boundary, trim, and sealing surface

Gate, globe, ball, plug, and butterfly

Disk, seat, stem, and sleeves

7 / 25

What are some advantages of a gate valve?

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

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

It is suitable for throttling applications and offers good flow control

It is more compact and lightweight than other valve types

8 / 25

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

Valve trim

Valve body

Valve packing

Valve actuator

9 / 25

What type of motion does a butterfly valve utilize?

Reciprocating motion

Oscillating motion

Rotational motion

Linear motion

10 / 25

What is the bonnet of a valve?

The cover for the opening in the valve body

The internal elements of a valve

The primary pressure boundary of the valve

The component that controls the stem and disk assembly

11 / 25

What is the purpose of the valve stem?

To allow for the throttling of fluid flow

To provide a tight seal between the stem and bonnet

To position the disk of the valve

To connect the valve to the actuator

12 / 25

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

By gradually increasing the flow area in the volute

By using check valves in the suction and discharge ports

By rotating the impeller to generate centrifugal force

By compressing the packing material in the pump casing

13 / 25

What is the purpose of a valve actuator?

To provide a tight seal between the valve body and bonnet

To prevent leakage between the valve trim and bonnet

To operate the stem and disk assembly

To control the flow and pressure within the system

14 / 25

What are the three basic categories of positive displacement pumps?

Spherical valves, cylindrical valves, and plug valves

Gate valves, globe valves, and ball valves

Reciprocating pumps, rotary pumps, and diaphragm pumps

Centrifugal pumps, axial flow pumps, and mixed flow pumps

15 / 25

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

Relieving over pressure in the system

Regulating downstream system pressure

Permitting and prohibiting fluid flow

Controlling the direction of fluid flow

16 / 25

What are the different types of valve stems?

Globe valves and gate valves

Rising stems and non-rising stems

Hand wheels and motor operators

Spherical and cylindrical stems

17 / 25

How does a globe valve regulate flow?

By fully opening the disk in the direction of flow

By adjusting the position of the bonnet

By gradually closing the disk against the seat

By controlling the direction of fluid flow

18 / 25

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

The size and shape of the impeller

The pressure in the pump casing

The pump speed and discharge resistance

The type of power unit driving the pump

19 / 25

What is the main advantage of a ball valve?

It is suitable for high-temperature applications

It has a compact and lightweight design

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

It offers precise flow control and throttling capability

20 / 25

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

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

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

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

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

21 / 25

What is commonly used as packing material in valves?

Forged and machined disk and seat

Hard-surfaced seal rings

Flange gaskets and stem packing gland

Fibrous material or compounds like Teflon

22 / 25

What is the function of a plug valve?

To start or stop fluid flow

To control the direction of fluid flow

To relieve component or piping over pressure

To regulate downstream system pressure

23 / 25

What is the purpose of a check valve?

To relieve component or piping over pressure

To prevent backflow of fluid in a system

To regulate downstream system pressure

To vary the amount of fluid flow

24 / 25

What is a diaphragm valve used for?

To relieve over pressure in the system

To control the direction of fluid flow

To regulate flow by adjusting the position of a flexible diaphragm

To provide a tight seal and prevent leakage

25 / 25

What is the purpose of the valve body?

To provide a framework for holding everything together

To vary the amount of fluid flow

To control the direction of fluid flow

To serve as the primary pressure boundary of the valve assembly

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