Question is ⇒ __________ tubes are good substitude for human blood vessels onrheart by-pass operation., Options are ⇒ (A) PVC, (B) Polythene, (C) Teflon/dacron, (D) Polystyrene, (E) , Leave your comments or Download question paper.

Question is ⇒ __________ tubes are good substitude for human blood vessels onrheart by-pass operation., Options are ⇒ (A) PVC, (B) Polythene, (C) Teflon/dacron, (D) Polystyrene, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	__________ tubes are good substitude for human blood vessels onrheart by-pass operation.
A.	PVC [Wrong Answer]
B.	Polythene [Wrong Answer]
C.	Teflon/dacron [Correct Answer]
D.	Polystyrene [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Styrene butadiene rubber is commercially manufactured by
bulk polymerisation
suspension polymerisation
solution polymerisation
emulsion polymerisation

⇒ The physical state in which polymers exist is
melts & rubber like state.
amorphous glassy state.
partially crystalline state.
all (a), (b) and (c).

⇒ Alkyd resin can not be used for making
plasticiser
paint & varnish
fibres
film forming materials

⇒ Polyvinyl acetate is never used for making
moulded articles
fibres
adhesives
all (a), (b) & (c)

⇒ Which of the following polymers does not belong to the class of polyacrylate polymer ?
PMMA
Polyacrylonitrile
Polyethyl acrylate
None of these

⇒ Polymerisation product of C₂F₄ (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
polyurethane
silicone rubber
teflon
epoxy resin

⇒ Most commonly used rubber vulcanisation agent is
sulphur
bromine
platinum
alumina

⇒ Thermosplastic materials
do not soften on application of heat.
are heavily branched molecules.
are solvent insoluble.
none of these.

⇒ Which of the following is not a condensation polymer ?
Bakelite
Melamine polymer
Polymethylmethacrylate (PMMA)
None of these

⇒ Buna-S is also known as
teflon
PTFE
SBR
polycrylates

⇒ __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.
Percent elongation
Resilience
Freezing point
Strength

⇒ Pickout the wrong statement.
Polymers made of only one monomer is called homopolymer.
Polymers made of more than one monomer is called copolymer or mixed polymer.
Vulcanised rubber is more elastic than natural rubber.
The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres.

⇒ Which of the following is not present in bagasse fibre ?
Cellulose
Lignin
Pentogens
None of these

⇒ A copolymer of vinyl and vinylidine chloride is called
treylene
orlon
saran
dacron

⇒ Polyurathane can not be used for making
mattresses & foam
coating material
adhesives
bottles

⇒ Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
Ni
V₂O₅
Fe
aluminium triethyl combined with titanium tetrachloride

⇒ Flexible plastic pipes are made of
high density polyethylene (HDPE).
low density polyethylene (LDPE).
polypropylene.
unsaturated polyester.

⇒ __________ is normally used for the manufacture of refrigerator components and transistor parts.
Polyproylene
Polystyrene
Polyester
Polyurathene

⇒ Which of the following is not a natural fibre?
Silk
Viscose rayon
Wool
Cotton

⇒ Synthetic rubber
deforms, if stretched to double of its original dimension.
is brittle at low temperature
is softer at higher temperature.
is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.

⇒ Poly Vinyl chloride (PVC) is a __________ material.
thermoplastic
thermosetting
fibrous
chemically active

⇒ SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at
0.04375
0.125694444444444
0.0430555555555556
0.0840277777777778

⇒ Thermosetting plastic materials
can be repeatedly melted.
is useful for melt casting.
can not be melted after forming.
is useful for spinning.

⇒ Automobile steering wheels are normally made of
cellulose acetate
cellulose nitrate
PVC
high density polythene

⇒ Nylon 6 as compared to nylon 6, 6 has lower
abrasion resistance.
thermal stability.
adhesion to rubber.
hardness.

⇒ Elastomers are
thermosetting material.
exemplified by protein derivatives.
having high flexural strength.
having very high tensile strength and heat resistance.

⇒ Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
tensile strength
chemical resistance
flexibility
all (a), (b) & (c)

⇒ Polyvinyl alcohol is used as a
cation/anion exchanger.
water soluble adhesive.
textile fibre.
non-sticky coating on frying pans.

⇒ Which of the following is not a thermoplastic material ?
Epoxy polymer
PVC
Polystyrene
Polythene

⇒ Low pressure Zeigler process of polythene manufacture
employs a pressure of 30 kgf/cm².
achieves an yield of 95-98% based on ethylene.
produces very low density polythene.
does not use any catalyst for polymerisation.