blow moulding
vacuum thermo forming
injection moulding
none of these
✅ The correct answer is option B.
Chemical Engineering MCQs
Polystyrene is a light, transparent, thermoplastic material used for making
toys and combs
packaging bags
non-sticking utensils
electrical insulation
✅ The correct answer is option A.
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
polymethyl methacrylate (PMMA).
Polytetraflouroethylene(PTFE).
polycarbonates.
phenolic resins.
✅ The correct answer is option A.
Thermosplastic materials
do not soften on application of heat.
are heavily branched molecules.
are solvent insoluble.
none of these.
✅ The correct answer is option D.
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
-20 to 25
50 to 75
100 to 150
250-280
✅ The correct answer is option D.
Refrigeration capacity of a household refrigerator may be round about __________ tons.
A. 0.15
B. 1.5
C. 4.5
D. 6.5
✅ The correct answer is option A.
Joule-Thomson experiment is
A. Isobaric
B. Adiabatic
C. Isenthalpic
D. Both B & C
✅ The correct answer is option D.
In case of a close thermodynamic system, there is __________ across the boundaries.
A. No heat and mass transfer
B. No mass transfer but heat transfer
C. Mass and energy transfer
D. None of these
✅ The correct answer is option B.
Diaphragm electrolytic cell as compared to mercury electrolytic cell
Produces 70% NaOH solution
Requires less specific power consumption for the production of chlorine
Requires lesser investment for similar capacity
All of the above
✅ The correct answer is option C.
The amount of benzene present in pure benzol is about __________ percent.
30
50
70
90
✅ The correct answer is option C.