FUN 1 EO: 1.62 - Radiation Protection Tech.

FUN 1 EO: 1.62

1 / 25

What is the purpose of a check valve?

To vary the amount of fluid flow

To regulate downstream system pressure

To relieve component or piping over pressure

To prevent backflow of fluid in a system

2 / 25

What is the primary function of a valve?

Relieving component or piping over pressure

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

Regulating downstream system or process pressure

Varying the amount of fluid flow

3 / 25

What is the purpose of the valve stem?

To provide a tight seal between the stem and bonnet

To position the disk of the valve

To connect the valve to the actuator

To allow for the throttling of fluid flow

4 / 25

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

To regulate the speed and size of the impeller

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

To support the pump internals and accessories

To prevent leakage between the suction and discharge ports

5 / 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

6 / 25

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

The type of power unit driving the pump

The size and shape of the impeller

The pump speed and discharge resistance

The pressure in the pump casing

7 / 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

8 / 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 utilize rotational motion, while centrifugal pumps utilize linear motion.

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

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

9 / 25

What are the different types of valve stems?

Spherical and cylindrical stems

Globe valves and gate valves

Hand wheels and motor operators

Rising stems and non-rising stems

10 / 25

What is commonly used as packing material in valves?

Flange gaskets and stem packing gland

Fibrous material or compounds like Teflon

Forged and machined disk and seat

Hard-surfaced seal rings

11 / 25

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

Valve actuator

Valve body

Valve packing

Valve trim

12 / 25

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

Controlling the direction of fluid flow

Relieving over pressure in the system

Permitting and prohibiting fluid flow

Regulating downstream system pressure

13 / 25

What is the main advantage of a ball valve?

It is suitable for high-temperature applications

It offers precise flow control and throttling capability

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

It has a compact and lightweight design

14 / 25

What type of motion does a butterfly valve utilize?

Reciprocating motion

Linear motion

Rotational motion

Oscillating motion

15 / 25

What is a diaphragm valve used for?

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

To relieve over pressure in the system

16 / 25

What is the bonnet of a valve?

The component that controls the stem and disk assembly

The cover for the opening in the valve body

The primary pressure boundary of the valve

The internal elements of a valve

17 / 25

What is the main advantage of a globe valve?

It has a simple and compact design

It offers low head loss and high flow capacity

It is suitable for high-pressure applications

It can start, stop, and regulate fluid flow

18 / 25

What is the main drawback of a gate valve?

It is not suitable for throttling applications

It requires lapping and grinding for repairs

It is prone to vibration in the partially open state

It has a higher head loss compared to other valves

19 / 25

What is the purpose of the valve body?

To control the direction of fluid flow

To vary the amount of fluid flow

To provide a framework for holding everything together

To serve as the primary pressure boundary of the valve assembly

20 / 25

What are the basic parts of a valve?

Pressure boundary, trim, and sealing surface

Gate, globe, ball, plug, and butterfly

Body, bonnet, trim, actuator, and packing

Disk, seat, stem, and sleeves

21 / 25

What is the purpose of a valve actuator?

To provide a tight seal between the valve body and bonnet

To control the flow and pressure within the system

To prevent leakage between the valve trim and bonnet

To operate the stem and disk assembly

22 / 25

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

By compressing the packing material in the pump casing

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

23 / 25

How does a globe valve regulate flow?

By fully opening the disk in the direction of flow

By controlling the direction of fluid flow

By adjusting the position of the bonnet

By gradually closing the disk against the seat

24 / 25

What are some advantages of a gate valve?

It is more compact and lightweight than other valve types

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

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

It is suitable for throttling applications and offers good flow control

25 / 25

What is the function of the valve trim?

To determine the valve's performance and control flow

To prevent leakage between the stem and bonnet of the valve

To provide a tight seal when the valve is closed

To connect the actuator and disk of the valve

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