Chemical Engineering MCQs

6108 MCQs  (Page 289 of 611)

Attempt Chemical Engineering Quiz
Thermosetting plastic materials___________________?
A. Can be repeatedly melted
B. Is useful for melt casting
C. Cannot be melted after forming
D. Is useful for spinning
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Polyurethane cannot be used to make____________________?
A. Automobile cushion
B. Thermal insulation in refrigerator
C. Coating and adhesive
D. Fibre reinforced plastic (frp)
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Polyvinyl chloride (PVC) ____________________?
A. Is produced by polycondensation reaction
B. Uses either emulsion or suspension polymerisation methods
C. Can be made thermosetting by adding a plasticiser
D. Softening temperature is 200°c
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Branched chain polymers compared to linear polymers have higher ____________________?
A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packing
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Polycaprolactam is____________________?
A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon
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Bakelite (phenol-formaldehyde) resin cannot be used as________________?
A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics
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Which of the following is the lowest cost plastic commercially available ?
A. Polythene
B. Teflon
C. Bakelite
D. Pvc
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Terylene is_________________?
A. Same as dacron
B. A polyester
C. Both a. & b.
D. Neither a. nor b.
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Which of the following is stretched into fibers ?
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite
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A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of_______________________?
A. Siloxane elastomers
B. Polyamides
C. Vinyl polymers
D. Urea-formaldehyde resins
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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