MMET 201 Exam 1 Questions With Complete Solutions
Thermosets
resistant to high heat/solvents
not recyclable
connected molecule chains
Polymer additives
Antioxidants
Flame Retardants
UV Stabilizers
Colorants
Plasticizers
Reinforcements
Fillers
3 applications of thermoplastics
acrylics
polythydenes
PVC
4 applications of thermosets
Expoxies
Phenolics
Polysters
Silicones
Properties of elastomers
,Amorphous
low glass transition temperature
natural and synthetic rubbers
Silicones
Polyurethane
Processes for forming plastics
Extrusion
Injection molding
Compression molding
Rotational molding
Thermoforming
Extrusion produces
continuous lengths of plastic sections
Types of fiber spinning
Melt spinning
wet spinning
dry spinning
gel spinning
Which plastic production process offers the lowest piece prices
available?
Injection molding
Compression molding is used mainly for
thermosets
Rotational molding produces
, hollow, completely closed objects
Thermoforming
the process of forming sheets or films over a mold through heat
and pressure
used in the last part of lab
Design dimension
expected dimension
Tolerance
allowable deviation from design dimension
Accuracy
deviation from design dimension
Precision
repeatability of measured data
Calibration
process to correct an instrument
Resolution
smallest measurable quantity
Straightness is measured using a
straightedge or a dial indicator
Flatness is measured using a
surface plate and a dial indicator, or an interfermetry
Roundness is measured using a
Thermosets
resistant to high heat/solvents
not recyclable
connected molecule chains
Polymer additives
Antioxidants
Flame Retardants
UV Stabilizers
Colorants
Plasticizers
Reinforcements
Fillers
3 applications of thermoplastics
acrylics
polythydenes
PVC
4 applications of thermosets
Expoxies
Phenolics
Polysters
Silicones
Properties of elastomers
,Amorphous
low glass transition temperature
natural and synthetic rubbers
Silicones
Polyurethane
Processes for forming plastics
Extrusion
Injection molding
Compression molding
Rotational molding
Thermoforming
Extrusion produces
continuous lengths of plastic sections
Types of fiber spinning
Melt spinning
wet spinning
dry spinning
gel spinning
Which plastic production process offers the lowest piece prices
available?
Injection molding
Compression molding is used mainly for
thermosets
Rotational molding produces
, hollow, completely closed objects
Thermoforming
the process of forming sheets or films over a mold through heat
and pressure
used in the last part of lab
Design dimension
expected dimension
Tolerance
allowable deviation from design dimension
Accuracy
deviation from design dimension
Precision
repeatability of measured data
Calibration
process to correct an instrument
Resolution
smallest measurable quantity
Straightness is measured using a
straightedge or a dial indicator
Flatness is measured using a
surface plate and a dial indicator, or an interfermetry
Roundness is measured using a
