Chemical Engineering - Polymer Technology

11.
Polystyrene is a light, transparent, thermoplastic material used for making
toys and combs
packaging bags
non-sticking utensils
electrical insulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins.
epoxy
phenol formaldehyde
urea formaldehyde
melamine formaldehyde
Answer: Option
Explanation:
No answer description is available. Let's discuss.

13.
Valcunisation of rubber decreases its
tensile strength.
resistance to organic solvents.
tackiness.
working temperature range.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
Plastic articles are normally produced by __________ moulding.
green sand
injection
shell
dry sand
Answer: Option
Explanation:
No answer description is available. Let's discuss.

15.
Thermocole (expanded polystyrene) is not used for
low temperature thermal insulation as in refrigerator and air conditioners.
accoustic control and ceiling for building.
high temperature thermal insulation in furnaces.
packing of delicate electronic gadgets.
Answer: Option
Explanation:
No answer description is available. Let's discuss.