Chemical Engineering Mcqs

Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?

• (A)  Saturated polyester
• (B)  Polyurethane
• (C)  Polystyrene
• (D)  Either

Answer

Submitted By :Ali Uppal

Phenol formaldehyde __________________?

• (A)  Employs addition polymerisation
• (B)  Employs condensation polymerisation
• (C)  Is a monomer
• (D)  Is an abrasive material

Answer

Submitted By :Ali Uppal

Which of the following is not a condensation polymer ?

• (A)  Bakelite
• (B)  Melamine polymer
• (C)  Poly-methyl-methacrylate (PMMA)
• (D)  None of these

Answer

Submitted By :Ali Uppal

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?

• (A)  Nylon
• (B)  Polyacrylonitrile
• (C)  Polypropylene
• (D)  Polyester

Answer

Submitted By :Ali Uppal

Which of the following is not a natural fiber ?

• (A)  Silk
• (B)  Viscose rayon
• (C)  Wool
• (D)  Cotton

Answer

Submitted By :Ali Uppal

Rayon is a ____________ fibre?

• (A)  Cellulosic
• (B)  Polyamide
• (C)  Polyester
• (D)  Natural

Answer

Submitted By :Ali Uppal

The starting material used for the manufacture of caprolactam is________________?

• (A)  Ethyl benzene
• (B)  Cyclohexane
• (C)  Ethylene glycol
• (D)  DMT

Answer

Submitted By :Ali Uppal

Size range of polymer molecules varies from __________ meter?

• (A)  10-2 to 10-5
• (B)  10-4 to 10-7
• (C)  10-1 to 10-2
• (D)  10-8 to 10-10

Answer

Submitted By :Ali Uppal

Polyhexamethylene adipamide is also known as______________?

• (A)  Bakelite
• (B)  Nylon-66
• (C)  Epoxy resin
• (D)  Silicone rubber

Answer

Submitted By :Ali Uppal

Thermoplastic materials___________________?

• (A)  Do not soften on application of heat
• (B)  Are heavily branched molecules
• (C)  Are solvent insoluble
• (D)  None of these

Answer

Submitted By :Ali Uppal