FUN 1 EO: 1.62 - Radiation Protection Tech.

FUN 1 EO: 1.62

1 / 25

What is the main advantage of a globe valve?

It offers low head loss and high flow capacity

It has a simple and compact design

It can start, stop, and regulate fluid flow

It is suitable for high-pressure applications

2 / 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

3 / 25

What is the function of the valve trim?

To connect the actuator and disk of the valve

To prevent leakage between the stem and bonnet of the valve

To determine the valve's performance and control flow

To provide a tight seal when the valve is closed

4 / 25

What type of motion does a butterfly valve utilize?

Oscillating motion

Reciprocating motion

Rotational motion

Linear motion

5 / 25

What is the function of a plug valve?

To control the direction of fluid flow

To regulate downstream system pressure

To start or stop fluid flow

To relieve component or piping over pressure

6 / 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 control the flow and pressure within the system

To operate the stem and disk assembly

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

Reciprocating pumps, rotary pumps, and diaphragm pumps

Spherical valves, cylindrical valves, and plug valves

8 / 25

What is commonly used as packing material in valves?

Hard-surfaced seal rings

Flange gaskets and stem packing gland

Forged and machined disk and seat

Fibrous material or compounds like Teflon

9 / 25

What is the purpose of the valve stem?

To connect the valve to the actuator

To allow for the throttling of fluid flow

To position the disk of the valve

To provide a tight seal between the stem and bonnet

10 / 25

What is the main difference between positive displacement pumps and 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.

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.

11 / 25

What are the different types of valve stems?

Globe valves and gate valves

Hand wheels and motor operators

Rising stems and non-rising stems

Spherical and cylindrical stems

12 / 25

What is the purpose of the valve body?

To vary the amount of fluid flow

To serve as the primary pressure boundary of the valve assembly

To control the direction of fluid flow

To provide a framework for holding everything together

13 / 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 internal elements of a valve

The primary pressure boundary of the valve

14 / 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 is suitable for high-temperature applications

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

15 / 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 controlling the direction of fluid flow

By gradually closing the disk against the seat

16 / 25

What is the primary function of a valve?

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

Relieving component or piping over pressure

Varying the amount of fluid flow

Regulating downstream system or process pressure

17 / 25

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

The pump speed and discharge resistance

The type of power unit driving the pump

The pressure in the pump casing

The size and shape of the impeller

18 / 25

What is a diaphragm valve used for?

To provide a tight seal and prevent leakage

To control the direction of fluid flow

To relieve over pressure in the system

To regulate flow by adjusting the position of a flexible diaphragm

19 / 25

What are the basic parts of a valve?

Disk, seat, stem, and sleeves

Body, bonnet, trim, actuator, and packing

Gate, globe, ball, plug, and butterfly

Pressure boundary, trim, and sealing surface

20 / 25

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

Valve trim

Valve actuator

Valve body

Valve packing

21 / 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

22 / 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

23 / 25

What is the main drawback of a gate valve?

It has a higher head loss compared to other valves

It is prone to vibration in the partially open state

It requires lapping and grinding for repairs

It is not suitable for throttling applications

24 / 25

What is the purpose of a check valve?

To relieve component or piping over pressure

To regulate downstream system pressure

To prevent backflow of fluid in a system

To vary the amount of fluid flow

25 / 25

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

Permitting and prohibiting fluid flow

Relieving over pressure in the system

Controlling the direction of fluid flow

Regulating downstream system pressure

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