FUN 1 EO: 1.62 - Radiation Protection Tech.

FUN 1 EO: 1.62

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

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

To prevent leakage between the suction and discharge ports

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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

3 / 25

What is the function of the valve trim?

To connect the actuator and disk of the valve

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

4 / 25

What is the main advantage of a globe valve?

It is suitable for high-pressure applications

It offers low head loss and high flow capacity

It can start, stop, and regulate fluid flow

It has a simple and compact design

5 / 25

What is the purpose of a check valve?

To prevent backflow of fluid in a system

To vary the amount of fluid flow

To relieve component or piping over pressure

To regulate downstream system pressure

6 / 25

What is commonly used as packing material in valves?

Forged and machined disk and seat

Flange gaskets and stem packing gland

Hard-surfaced seal rings

Fibrous material or compounds like Teflon

7 / 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

8 / 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 suitable for throttling applications and offers good flow control

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

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What is the main drawback of a gate valve?

It is not suitable for throttling applications

It has a higher head loss compared to other valves

It requires lapping and grinding for repairs

It is prone to vibration in the partially open state

10 / 25

What is the bonnet of a valve?

The component that controls the stem and disk assembly

The primary pressure boundary of the valve

The cover for the opening in the valve body

The internal elements of a valve

11 / 25

What are the basic parts of a valve?

Pressure boundary, trim, and sealing surface

Disk, seat, stem, and sleeves

Gate, globe, ball, plug, and butterfly

Body, bonnet, trim, actuator, and packing

12 / 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

Centrifugal pumps, axial flow pumps, and mixed flow pumps

Reciprocating pumps, rotary pumps, and diaphragm pumps

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What type of motion does a butterfly valve utilize?

Rotational motion

Oscillating motion

Reciprocating motion

Linear motion

14 / 25

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

By using check valves in the suction and discharge ports

By compressing the packing material in the pump casing

By gradually increasing the flow area in the volute

By rotating the impeller to generate centrifugal force

15 / 25

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

Valve packing

Valve actuator

Valve trim

Valve body

16 / 25

What is the purpose of a valve actuator?

To operate the stem and disk assembly

To prevent leakage between the valve trim and bonnet

To provide a tight seal between the valve body and bonnet

To control the flow and pressure within the system

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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 require a higher power input compared to centrifugal pumps.

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

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

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What is the main advantage of a ball valve?

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

It offers precise flow control and throttling capability

19 / 25

What is the function of a plug valve?

To relieve component or piping over pressure

To control the direction of fluid flow

To regulate downstream system pressure

To start or stop fluid flow

20 / 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 provide a framework for holding everything together

To control the direction of fluid flow

21 / 25

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

Permitting and prohibiting fluid flow

Controlling the direction of fluid flow

Relieving over pressure in the system

Regulating downstream system pressure

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What is the purpose of the valve stem?

To connect the valve to the actuator

To provide a tight seal between the stem and bonnet

To allow for the throttling of fluid flow

To position the disk of the valve

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How does a globe valve regulate flow?

By adjusting the position of the bonnet

By controlling the direction of fluid flow

By gradually closing the disk against the seat

By fully opening the disk in the direction of flow

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What is the primary function of a valve?

Varying the amount of fluid flow

Relieving component or piping over pressure

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

Regulating downstream system or process pressure

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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

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