Manufacturing Technology (3151912) MCQs

MCQs of Plastic Technology

Showing 1 to 8 out of 8 Questions
1.

Thermosetting plastics

(a)

Soften on the application of heat and can be repeatedly moulded
(b)

Will not deform when again subjected to heat
(c)

Are produced on a synthetic resin base
(d)

Are synthetic base resins having a predefined setting temperature
Answer:

Option (b)

2.

 Other than elasticity and rubber like material, the important property of polyvinyl chloride (PVC) is

(a)

Odourless
(b)

Colourability
(c)

Non-flammable
(d)

Impervious to water
Answer:

Option (c)

3.

Filler is used in plastics to

(a)

Completely fill up the voids created during manufacturing
(b)

Improve plasticity, strength and toughness
(c)

Provide colour, strength, impact and resistance and reduce cost
(d)

To accelerate the condensation and polymerisation
Answer:

Option (c)

4.

Which of the following moulding methods is generally not used for thermoplastic materials

(a)

Extrusion
(b)

Injection
(c)

Casting
(d)

Calendering
Answer:

Option (c)

5.

The moulding process employed for thermoplastic material is

(a)

Injection and extrusion methods
(b)

Compression and transfer moulding methods
(c)

Similar to thermosetting plastics except that higher temperature is used
(d)

Similar to thermosetting plastics except that a lower temperature is used
Answer:

Option (a)

6.

Pigments are fine, solid particles used in preparation of

(a)

Varnishes
(b)

Plastics
(c)

Chemicals
(d)

Paints
Answer:

Option (d)

7.

One of the main disadvantage of thermosetting and thermoplastic plastics is that

(a)

They deform under heat and pressure
(b)

They are resistant to water upto 100°C only
(c)

They do not possess a high mechanical strength
(d)

Their shape cannot be changed without application of heat
Answer:

Option (c)

8.

Polyesters belong to the group of

(a)

Thermoplastic plastics
(b)

Thermosetting plastics
(c)

Phenolics
(d)

PVC
Answer:

Option (b)

Showing 1 to 8 out of 8 Questions