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 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

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What is the purpose of a check valve?

To vary the amount of fluid flow

To prevent backflow of fluid in a system

To regulate downstream system pressure

To relieve component or piping over pressure

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What are the basic parts of a valve?

Gate, globe, ball, plug, and butterfly

Body, bonnet, trim, actuator, and packing

Disk, seat, stem, and sleeves

Pressure boundary, trim, and sealing surface

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How does a globe valve regulate flow?

By controlling the direction of fluid flow

By adjusting the position of the bonnet

By fully opening the disk in the direction of flow

By gradually closing the disk against the seat

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What is the function of a plug valve?

To regulate downstream system pressure

To start or stop fluid flow

To relieve component or piping over pressure

To control the direction of fluid flow

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What is the purpose of the valve body?

To provide a framework for holding everything together

To control the direction of fluid flow

To vary the amount of fluid flow

To serve as the primary pressure boundary of the valve assembly

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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

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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 position the disk of the valve

To allow for the throttling of fluid flow

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What are the different types of valve stems?

Rising stems and non-rising stems

Globe valves and gate valves

Hand wheels and motor operators

Spherical and cylindrical stems

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What is commonly used as packing material in valves?

Flange gaskets and stem packing gland

Hard-surfaced seal rings

Fibrous material or compounds like Teflon

Forged and machined disk and seat

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What is a diaphragm valve used for?

To relieve over pressure in the system

To provide a tight seal and prevent leakage

To regulate flow by adjusting the position of a flexible diaphragm

To control the direction of fluid flow

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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 prevent leakage between the stem and bonnet of the valve

To connect the actuator and disk of the valve

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

Regulating downstream system pressure

Permitting and prohibiting fluid flow

Relieving over pressure in the system

Controlling the direction of fluid flow

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

Valve actuator

Valve packing

Valve body

Valve trim

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What is the bonnet of a valve?

The internal elements of a valve

The primary pressure boundary of the valve

The component that controls the stem and disk assembly

The cover for the opening in the valve body

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

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.

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What is the purpose of a valve actuator?

To provide a tight seal between the valve body and bonnet

To operate the stem and disk assembly

To prevent leakage between the valve trim and bonnet

To control the flow and pressure within the system

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What type of motion does a butterfly valve utilize?

Rotational motion

Reciprocating motion

Oscillating motion

Linear motion

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What is the main advantage of a ball valve?

It offers precise flow control and throttling capability

It is suitable for high-temperature applications

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

It has a compact and lightweight design

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

By gradually increasing the flow area in the volute

By compressing the packing material in the pump casing

By using check valves in the suction and discharge ports

By rotating the impeller to generate centrifugal force

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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 more compact and lightweight than other valve types

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

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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

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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

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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

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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

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