Chemical Engineering Mcqs

Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?

• (A)  Ethylene glycol
• (B)  Stearic acid estors
• (C)  Tricresyl phosphate
• (D)  Esters of phthalic acid

Answer

Submitted By :Ali Uppal

Polycaprolactam is nothing but __________________?

• (A)  Orlon
• (B)  Nylon-66
• (C)  Nylon-6
• (D)  Saran

Answer

Submitted By :Ali Uppal

Poly Vinyl chloride (PVC) is a ________________ material?

• (A)  Thermoplastic
• (B)  Thermosetting
• (C)  Fibrous
• (D)  Chemically active

Answer

Submitted By :Ali Uppal

_____________ moulding is used for shaping of thermosetting plastics exclusively?

• (A)  Compression
• (B)  Injection
• (C)  Transfer
• (D)  Extrusion

Answer

Submitted By :Ali Uppal

Cellulose is the main constituent of most ______________ fibres?

• (A)  Acrylic
• (B)  Spandex
• (C)  Synthetic
• (D)  Natural

Answer

Submitted By :Ali Uppal

Phthalic anhydride is used___________________?

• (A)  In making PVC
• (B)  As plasticisers
• (C)  In insecticides manufacture
• (D)  For making nylon-6

Answer

Submitted By :Ali Uppal

The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is____________________?

• (A)  Polyvinyl alcohol
• (B)  Polyvinyl acetate
• (C)  Polyvinyl butyral
• (D)  PVC

Answer

Submitted By :Ali Uppal

Polycaprolactam is also known as _________________?

• (A)  Nylon-66
• (B)  Nylon-6
• (C)  Teflon
• (D)  SBR

Answer

Submitted By :Ali Uppal

Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?

• (A)  Acrylic
• (B)  Polyester
• (C)  Nylon 6:6
• (D)  Polypropylene

Answer

Submitted By :Ali Uppal

Flexible foam (for mattresses) are usually made of _________________?

• (A)  PVC
• (B)  Silicone rubber
• (C)  Polyurethanes
• (D)  Polyamides

Answer

Submitted By :Ali Uppal