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Polymer Technology
See What Others Are Saying!
Question
Buna-S is also known as
Options
A. teflon
B. PTFE
C. SBR
D. polycrylates
Correct Answer
SBR
More questions
1. With rise in pressure, the solubility of gases in solvent, at a fixed temperature
Options
A. increases
B. decreases
C. remains unchanged
D. decreases linearly
Show Answer
Scratch Pad
Discuss
Correct Answer: increases
2. Presence of nickel in steel improves its
Options
A. corrosion resistance.
B. cutting ability.
C. wear resistance.
D. all (a), (b) and (c).
Show Answer
Scratch Pad
Discuss
Correct Answer: corrosion resistance.
3. With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products
Options
A. decreases
B. increases
C. remains same
D. unpredictable from the data
Show Answer
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Discuss
Correct Answer: increases
4. If dp is the equivalent diameter of a non-spherical particle, V
p
its volume and sp its surface area, then its sphericity is ?
s
is defined by
Options
A. ?
s
= 6 V
p
/d
p
s
p
B. ?
s
= V
p
/d
p
s
p
C. ?
s
= 6 d
p
S
p
/V
p
D. ?
s
= d
p
S
p
/V
p
Show Answer
Scratch Pad
Discuss
Correct Answer: ?
s
= 6 V
p
/d
p
s
p
5. Teflon is
Options
A. phenol formaldehyde
B. an inorganic polymer
C. polytetra florouethylene (PTFE)
D. a monomer
Show Answer
Scratch Pad
Discuss
Correct Answer: polytetra florouethylene (PTFE)
6. The unit of
C
p
in S.I. units is
Options
A. W/m
2
.°K
B. J/kg.°K
C. W/m.°K
D. J/m
3
. °K
Show Answer
Scratch Pad
Discuss
Correct Answer: J/kg.°K
7. Ferromagnetic ceramic material is not used in the
Options
A. thermal insulation
B. transformers
C. magnetic switches
D. television sets
Show Answer
Scratch Pad
Discuss
Correct Answer: thermal insulation
8. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
Options
A. zig-zag
B. chain
C. diamond
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: chain
9. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
Options
A. Kelvin
B. Centigrade
C. Fahrenheit
D. Reaumer
Show Answer
Scratch Pad
Discuss
Correct Answer: Fahrenheit
10. Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing
Options
A. rupture diaphragm
B. dikes
C. surge chamber
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: rupture diaphragm
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