Related Questions

____ 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
__________ 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
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
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
Plasticisers are added to synthetic plastics to
A Impart flexibility
B Improve workability during fabrication
C Develop new improved properties not present in the original resin
D All of the above
Molecular weights of plastics ranges from
A 1000 to 5000
B 5000 to 1000
C 20000 to 25000
D 109 to 1011
This type of rapid prototyping system uses a laser to fuse powdered metals, plastics, or ceramics:
A Fused deposition modeling
B Stereo lithography apparatus
C Solid ground curing
D Selective laser sintering
In drilling Bakelite and fibrous plastics, the point angle of a drill is
A 90°
B 118°
C 135°
D 150°

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