Related Questions

Plasticisers are added to paints to
A Make it corrosion resistant
B Make glossy surface
C Give elasticity & prevent cracking of the film
D Increase atmospheric oxidation
Plasticisers are added to polymers to improve their
A Tensile strength
B Softness & flexibility
C Acid resistance
D Alkali resistance
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser?
A Ethylene glycol
B Stearic acid estors
C Tricresyl phosphate
D Esters of phthalic acid
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
A Tensile strength
B Chemical resistance
C Flexibility
D All of the above
Which of the following additives are added to plastics to make it impervious to X-rays?
A Asbestos
B Barium salt
C Carborundum
D Phthalic acid
____ the passage of light, many new plastics are processed using technologies rivaling those used in the manufacture of computer chips.
A To better permit
B For the better of
C Permitting better
D It is better for
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
A Piston
B Gear
C Positive displacement
D Sump
__________ moulding process can not be used for thermoplastic plastics.
A Compression
B Extrusion
C Injection
D None of these
__________ moulding is used for shaping of thermosetting plastics exclusively.
A Compression
B Injection
C Transfer
D Extrusion
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
A 100
B 150
C 350
D 450

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