⚗️ Chemical Engineering Solved MCQs with Answers

Practice 1920 approved ⚗️ Chemical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1920 solved MCQs

Pick up the correct network for the activities of pouring concrete, erection of form work, removal of form work and curing of concrete from the following:Answer: 1. Erection of form work 2. Pouring of concrete 3. Removal of form work 4. Curing of concrete Nylon-6 is manufactured fromAnswer: Caprolactum. Caprolactum, a raw material for the manufacture of nylon-6, is produced fromAnswer: Benzene The monomer of poly vinyl chloride (PVC) isAnswer: Chloroethene Buna-S is also known asAnswer: SBR Neoprene is chemically known asAnswer: Poly chloroprene Lavatory cisterns are normally made ofAnswer: Expanded polystyrene Plasticisers are added to synthetic plastics toAnswer: All (a), (b) and (c). Cellulose is the main contituent of most __________ fibres.Answer: Natural __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.Answer: Amino __________ tubes are good substitude for human blood vessels onrheart by-pass operation.Answer: Teflon/dacron Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?Answer: Both a & b Automobile steering wheels are normally made ofAnswer: Cellulose acetate In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?Answer: Bakelite (phenol formaldehyde) 90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.Answer: 250-280 Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.Answer: 1-1000 Which of the following low molecular weight (<10⁴ ), soft & waxy polymer is used in chewing gum ?Answer: Polyvinyl acetate Buna-S is a __________ material.Answer: Rubbery Zeigler - Natta catalyst (AlR3 - AlCl3) is used in the polymerisation ofAnswer: Propylene Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made ofAnswer: Butyl rubber Neoprene is aAnswer: Synthetic rubber The main use of butadiene isAnswer: In the manufacture of synthetic rubber. Mastication of rubber meansAnswer: Its softening. Polymethyl methacrylate (PMMA) is known asAnswer: Perspex Reaction of dimethyl terephthalate (DMT) and ethylene glycol producesAnswer: Dacron Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.Answer: Butyl Density of high density polythene is about __________ gm/c.c.Answer: 0.95 Vinyl flooring is done using __________ sheets.Answer: PVC Thiokol is nothing butAnswer: Polysulphide rubber Transistor parts and refrigerator components are normally made ofAnswer: Polystyrene