Deck 12: Polymer Processing Techniques

Question 1

The joints made by an electromagnetic forming process are much stronger than the parent material.

Answer 1

True

Question 2

What is the minimum pressure required in a compression molding process?

A)0.5 mpa
B)1 mpa
C)1.5 mpa
D)2 mpa

Answer 2

0.5 mpa

Question 3

What is the minimum curing time required in a compression molding process?

A)0.4 minutes
B)0.5 minutes
C)0.6 minutes
D)0.7 minutes

Answer 3

0.5 minutes

Question 4

What is the maximum pressure required in a transfer molding process?

A)80 mpa
B)90 mpa
C)100 mpa
D)120 mpa

Question 5

Thermosetting materials are the polymeric materials which get soften on heating with or without pressure.

Question 6

Polyurethanes plastics can be made in flexible foams even after belonging to thermosetting polymers.

Question 7

Thermosetting plastics like epoxies can be used for filament wound rocket motor casings in missiles by combining with glass fibers.

Question 8

Mechanical properties of any plastics are mainly dependent on the temperature, force and time of load applied.

Question 9

Where does the granular molding material get loaded into?

A)barrel
B)hopper
C)pellets
D)split

Question 10

There is a varied pressure provided in the solidification unit of injection molding process.

Question 11

Which of the following is not an application of blow molding process?

A)toy bodies
B)door liners
C)bottles
D)pipes

Question 12

The heater in the vacuum forming process is heated up to 90°C.

Question 13

The initial cost in blow molding is low.