high density polyethylene (HDPE).
low density polyethylene (LDPE).
polypropylene.
unsaturated polyester.
✅ The correct answer is option B.
Chemical Engineering MCQs
Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.
nylon
polyacrylonitrile
polypropylene
polyester
✅ The correct answer is option B.
Neoprene is chemically known as
polybutandiene
styrene butadiene rubber (SBR)
polyurethane
poly chloroprene
✅ The correct answer is option D.
Liners of bags are usually made of
polythene
PVC
polypropylene
polyesters
✅ The correct answer is option C.
For a reversible process involving only pressure-volume work
A. (dF)T, p < 0
B. (dF)T, p > 0
C. (dF)T, p = 0
D. (dA)T, v < 0
✅ The correct answer is option C.
y = specific heat ratio of an ideal gas is equal to
A. Cp/Cv
B. Cp/(CP-R)
C. 1 + (R/CV)
D. All of the above
✅ The correct answer is option D.
Heat is added at constant pressure in an ideal __________ cycle.
A. Stirling
B. Brayton
C. Rankine
D. Both B and C
✅ The correct answer is option D.
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).
Unsaturated polyester
Alkyd resins
Saturated polyester
Amino resins
✅ The correct answer is option B.
Thermosetting plastic materials
can be repeatedly melted.
is useful for melt casting.
can not be melted after forming.
is useful for spinning.
✅ The correct answer is option C.
__________ is an addition polymer
Nylon
Bakelite
Polythene
none of these
✅ The correct answer is option C.