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The initial cost in blow molding is low.

A) True
B) False

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


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

E) A) and C)
F) None of the above

Correct Answer

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


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

E) B) and C)
F) A) and B)

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B

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

A) True
B) False

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

A) True
B) False

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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

E) None of the above
F) B) and D)

Correct Answer

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

A) True
B) False

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

A) True
B) False

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

A) True
B) False

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

A) True
B) False

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True

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

A) True
B) False

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True

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

E) A) and D)
F) A) and C)

Correct Answer

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Where does the granular molding material get loaded into?


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

E) B) and C)
F) All of the above

Correct Answer

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