Single Screw Gap Analysis - Entry
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Single Screw Extrusion Gap Analysis - Entry Level
This assessment will give you an overview of you level of knowledge in Single Screw Extrusion. You will receive an email with your result as soon as it is completed.
The assessment should take you 10-20 Minutes.
All results are strictly confidential.
Good Luck!
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Single Screw Extrusion Overview - Entry Level.
Please select the best possible answer in the below questions
If you suspect a fluid leak, which is an appropriate course of action?
Wait until the end of your shift and then clean up fluid
Check it with your hand to determine if its still leaking determine if its still leaking
Inform your supervisor
All of the above are correct
Which Employees have permission to reach under the machine guards while the machine is running?
No employees have permission
Supervisors and management
Technicians and die setters
Operators and materials handlers
Safety precautions for your job are determined by...
Your immediate supervisors
National safety organisations
Regional safety organisations
All of the above
Which protective gear should be worn when operating a grinder
Safety glasses
Hearing protection
Safety glasses, hearing and dust mask
Only safety shoes are necessary
Plant personal need to know the location of...
All eyewash stations
All first aid stations
All emergency exits
All of the above are necessary
Lock-out/Tag-out signs apply to....
Electricity lock out
Pressure release lock out
Movement lock out
All of the above
The gearbox...
Increases the motor's speed and torque
Increase the motor's speed and decrease the torque
Reduces the motors speed and torque
Reduces the motor's speed and increase the torque
Which extruder component supports the screen pack?
Coupling
Breaker plate
Die
Adaptor
Material Viscosity variations are likely to occur...
From the top to the bottom of a container
From container to container
From lot to lot
A and B only
Variations will occur in all cases
Before starting up a starve-feed extruder, you must ensure....
The feedthroat is filled with material
Material is molten in the feed throat
The feedthroat is half-way filled with material
The feed throat is empty
Copolymers are plastics made from
Homopolymers
Two types of monomers
Two types of polymers
Three types of polymers
Degradation of the raw material may cause a change in the
Processing behavior of the plastic
Strength of the plastic
Colour of the plastic
All of the above are possible
When plastic is heated the polymer molecules
crystallize
Move apart
Degrade
All of the above
The density of a material is ratio of weight ormass to
Space in cm3
Volume in CC
Capacity ml
All of the above
None of the above
Skin will begin to blister when its temperature is raised above
54 degree Celsius
100 degree Celsius
77 degree Fahrenheit
210 degree Celsius
212 degrees Fahrenheit
When changing to a new plastic you should
Clean the feed lines
Check for contamination
Clean the hopper
All of the above
At startup with an extruder full of plastic, screw rotation can begin
When the setpoint temperature of the die have been reached
When the setpoint temperature of the barrel have been reached
When the setpoint temperature of both the barrel and die have been reached
After the extruder, head , and die have heat soaked sufficiently at the setpoint tempretures
Any of the above
Screw rotation should be started
At full operating speed
At the speed needed to achieve the desired output
Bt speeding up to get maximum momentum
At 5 - 10 rpm
If once screw rotation has began, the motor load or extruder head pressure exceeds allowable limits, you should
Turn up the barrel heats
Increase screw rpm
Contact your supervisor
Shut down immediately
Plastic residue can be removed from the die gap
When it is hot
With brass tools
By gently rubbing with copper or brass gauze
Any of the above
With an aluminium tool
The barrel thermocouple measure
The temperature of the plastic inside the barrel
The temperature of the heater
The temperature of the barrel metal
All of the above
Dies should be cleaned of plastic when they are
Cold
Hot
Room tempreature
Dismantled
A hot die attached to an extruder, is safe to stand in front of
When you are working on it
When the extruder drive motor is off
When no plastic is coming out slowly
At no time
In a vented extruder, the raw materials should be ________ before it reaches the vent section
Partially melted
Hard
Compleatly melted
Separated
What is the most common cause of plastic degradation?
Under mixing the plastic
Overheating the plastic
Over cooling the plastic
None of the above
Can we contact you about furthering your skills?
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Can we contact your company with your results to discuss further training?
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No
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