Question 1

There are five different pieces of equipment in the dryer/classifier system, which one is not.

Accepted Answer

The melt divert valve is not part of the dryer/classifier system; it is typically associated with processes involving molten materials, not drying or classifying.

Question 2

The __________ separates trash from the pellet slurry.

Accepted Answer

The scalping box is used to separate trash or unwanted materials from the pellet slurry in industrial processes.

Question 3

The dryer dries pellets using ____________.

Accepted Answer

The dryer dries pellets using both high speed air and centrifugal force.

Question 4

Various additives such as _____________ help narrow molecular weight distribution and swell.

Accepted Answer

Peroxide is used as an additive to help control the molecular weight distribution and can cause swelling in polymers by initiating free radical reactions.

Question 5

An __________ is a device designed to prevent damage to equipment and personnel. This is accomplished by stopping or preventing the start of certain equipment functions unless a preset condition has been met.

Accepted Answer

An interlock is a device or mechanism that prevents the operation of equipment unless certain conditions are met, ensuring safety and preventing damage.

Question 6

A ____________ is a special type of interlock that controls a set of conditions that must be satisfied before a piece of equipment can be started.

Accepted Answer

A permissive is a type of interlock that ensures certain conditions are met before equipment can be started, allowing for safe operation.

Question 7

A _____________ is a polymer filtering device. It comes in a variety of designs and shapes which range from circular, flat multi-layered screens to a group of 27 horizontal mesh filtering screens held in a large steel cylinder is the next area the melt passes through. The _________ traps any particles or foreign objects in the polymer stream.

Accepted Answer

A screen pack is a polymer filtering device that consists of multiple layers of mesh screens, often held in a steel cylinder, used to trap particles or foreign objects in the polymer stream.

Question 8

It is the function of the _____________ to thoroughly mix the streams of granules, peroxide and additive(s). The ___________ achieves this by stirring its contents with a large spiral auger as the material is moved along by the auger in a trough.

Accepted Answer

The answer of It is the function of the _____________...

Question 9

The discharge side of homogenizer is equipped with a _____ to hold a constant level for better mixing.

Accepted Answer

A weir is used to maintain a constant level of liquid, which helps in achieving better mixing in the discharge side of a homogenizer.

Question 10

___________ deal with start up items whereas hardwire interlocks deal with shut down items.

Accepted Answer

Permissive interlocks are used to ensure certain conditions are met before starting up equipment, while hardwire interlocks are typically used for shutdown safety measures.

Question 11

Melting the granules:

Accepted Answer

Melting the granules allows the polymer to be cut up into pellets and encapsulates the additives in the polypropylene.

Question 12

There are two types of interlocks:

Accepted Answer

Softwire and hardwire are two types of interlocks.

Question 13

A solids feeder connected to an air system that is used to transfer plastic. When the slide valve is opened under a feed tank, granules drop into a ___________. Granules move through the system without altering pressures on either side of the star feeder with the aid of a vent.

Accepted Answer

A star feeder, also known as a rotary valve, is used to control the flow of granules into the air system without altering the pressure on either side.

Question 14

The ____________ rotating knives cut the strands of polymer as they leave the die holes in the Extruder, producing pellets, the product of the Extruder post. The newly formed pellets are carried away and kept from sticking together by a flow of water which is a part of the pellet water system.

Accepted Answer

Pelletizers are machines equipped with rotating knives that cut strands of polymer into pellets as they exit the die holes in an extruder.

Question 15

The ___________ separates good pellets from over-sized or misshapen pellets.

Accepted Answer

A classifier is used to separate good pellets from over-sized or misshapen pellets by sorting them based on size or shape.

Question 16

The __________, the first part of the dryer, is a dewatering device that separates the bulk of the water off by gravity.

Accepted Answer

The answer of The __________, the first part of the...

Question 17

Please sketch a simple flow diagram of a modern plastics finishing facility. Label key equipment.

Accepted Answer

The answer of Please sketch a simple flow diagram of...

Question 18

The dryer ___________ removes moisture and heat from the pellets.

Accepted Answer

The vent fan in a dryer is responsible for removing moisture and heat from the pellets by circulating air.

Question 19

The purpose of the extruder is to:

Accepted Answer

The answer of The purpose of the extruder is to:
...

Question 20

In its granular and flake form polypropylene has:

Accepted Answer

Polypropylene in its granular and flake form can have a broad molecular weight distribution and inconsistent additive content, which can affect its processing and properties.

Quiz 17: Plastics Systems

There are five different pieces of equipment in the dryer/classifier system, which one is not.

The __________ separates trash from the pellet slurry.

The dryer dries pellets using ____________.

Various additives such as _____________ help narrow molecular weight distribution and swell.

An __________ is a device designed to prevent damage to equipment and personnel. This is accomplished by stopping or preventing the start of certain equipment functions unless a preset condition has been met.

A ____________ is a special type of interlock that controls a set of conditions that must be satisfied before a piece of equipment can be started.

It is the function of the ___ to thoroughly mix the streams of granules, peroxide and additive(s) . The _ achieves this by stirring its contents with a large spiral auger as the material is moved along by the auger in a trough.

The discharge side of homogenizer is equipped with a _____ to hold a constant level for better mixing.

___________ deal with start up items whereas hardwire interlocks deal with shut down items.

Melting the granules:

There are two types of interlocks:

A solids feeder connected to an air system that is used to transfer plastic. When the slide valve is opened under a feed tank, granules drop into a ___________. Granules move through the system without altering pressures on either side of the star feeder with the aid of a vent.

The ____________ rotating knives cut the strands of polymer as they leave the die holes in the Extruder, producing pellets, the product of the Extruder post. The newly formed pellets are carried away and kept from sticking together by a flow of water which is a part of the pellet water system.

The ___________ separates good pellets from over-sized or misshapen pellets.

The __________, the first part of the dryer, is a dewatering device that separates the bulk of the water off by gravity.

Please sketch a simple flow diagram of a modern plastics finishing facility. Label key equipment.

The dryer ___________ removes moisture and heat from the pellets.

The purpose of the extruder is to:

In its granular and flake form polypropylene has:

Quiz 17: Plastics Systems

There are five different pieces of equipment in the dryer/classifier system, which one is not.

The __________ separates trash from the pellet slurry.

The dryer dries pellets using ____________.

Various additives such as _____________ help narrow molecular weight distribution and swell.

An __________ is a device designed to prevent damage to equipment and personnel. This is accomplished by stopping or preventing the start of certain equipment functions unless a preset condition has been met.

A ____________ is a special type of interlock that controls a set of conditions that must be satisfied before a piece of equipment can be started.

It is the function of the _____________ to thoroughly mix the streams of granules, peroxide and additive(s) . The ___________ achieves this by stirring its contents with a large spiral auger as the material is moved along by the auger in a trough.

The discharge side of homogenizer is equipped with a _____ to hold a constant level for better mixing.

___________ deal with start up items whereas hardwire interlocks deal with shut down items.

Melting the granules:

There are two types of interlocks:

A solids feeder connected to an air system that is used to transfer plastic. When the slide valve is opened under a feed tank, granules drop into a ___________. Granules move through the system without altering pressures on either side of the star feeder with the aid of a vent.

The ____________ rotating knives cut the strands of polymer as they leave the die holes in the Extruder, producing pellets, the product of the Extruder post. The newly formed pellets are carried away and kept from sticking together by a flow of water which is a part of the pellet water system.

The ___________ separates good pellets from over-sized or misshapen pellets.

The __________, the first part of the dryer, is a dewatering device that separates the bulk of the water off by gravity.

Please sketch a simple flow diagram of a modern plastics finishing facility. Label key equipment.

The dryer ___________ removes moisture and heat from the pellets.

The purpose of the extruder is to:

In its granular and flake form polypropylene has:

It is the function of the ___ to thoroughly mix the streams of granules, peroxide and additive(s) . The _ achieves this by stirring its contents with a large spiral auger as the material is moved along by the auger in a trough.