TSM 241 EXAM 2 REVIEW QUESTIONS
AND ANSWERS GRADED A+ 2025/2026
Which of the following are sections of a conventional extruder barrel for thermoplastics (three
correct answers)?
feed section
compression section
heating section
shaping section
metering section
die section - ANS Feed section, Compression section,
Metering Section
The forward movement of polymer melt in an extruder barrel is resisted by drag flow, which is
caused by the resistance to flow through the die orifice.
True or False - ANS False
In the extrusion process, shear rates are often proportional to flow rates.
1 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
, True or False - ANS True
In which of the following properties do plastic parts often compare favorably with metals (two
correct answers)?
strength
impact resistance
stiffness
resistance to ultraviolet radiation
strength to weight ratio - ANS Impact Resistance,
Strength to weight ratio
In the extrusion process, shear stresses are proportional to shear rates.
True or False - ANS True
Extrusion is a compressive process in which material is forced to flow through a die orifice to
provide long continuous product whose cross-sectional shape is determined by the shape of the
orifice.
True or False - ANS True
The die swell ratio for a polymer melt has a value that is always greater than one.
True or False - ANS True
2 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
AND ANSWERS GRADED A+ 2025/2026
Which of the following are sections of a conventional extruder barrel for thermoplastics (three
correct answers)?
feed section
compression section
heating section
shaping section
metering section
die section - ANS Feed section, Compression section,
Metering Section
The forward movement of polymer melt in an extruder barrel is resisted by drag flow, which is
caused by the resistance to flow through the die orifice.
True or False - ANS False
In the extrusion process, shear rates are often proportional to flow rates.
1 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
, True or False - ANS True
In which of the following properties do plastic parts often compare favorably with metals (two
correct answers)?
strength
impact resistance
stiffness
resistance to ultraviolet radiation
strength to weight ratio - ANS Impact Resistance,
Strength to weight ratio
In the extrusion process, shear stresses are proportional to shear rates.
True or False - ANS True
Extrusion is a compressive process in which material is forced to flow through a die orifice to
provide long continuous product whose cross-sectional shape is determined by the shape of the
orifice.
True or False - ANS True
The die swell ratio for a polymer melt has a value that is always greater than one.
True or False - ANS True
2 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
