Related Questions

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the
A Low impact strength
B High flexibility
C Better finish and surface appearance
D High plastic deformation
Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?
A Decrease in effect
B Increase in thrust
C Develops noise
D Develops high pressure
Celluloid is
A Cellulose acetate
B Regenerated cellulose
C Cellulose nitrate
D Cellulose acetate butyrate
Celluloid is chemically
A Cellulose acetate
B Regenerated cellulose
C Cellulose nitrate
D Cellulose acetate butyrate
Thermosetting polymers as compared to thermoplastic polymers
A Are formed by addition polymerisation
B Have three dimensional structure
C Have linear structure
D None of these
Branched chair polymers as compared to linear polymers have
A Higher melting point
B Higher tensile strength
C Lower density
D None of these
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
A Densities
B Melting point
C Tensile strength
D Hardness, rigidity & brittleness
Branched chain polymers compared to linear polymers have higher
A Density
B Tensile strength
C Melting point
D Degree of irregularity in atomic packing
The undesirable property of a refrigerant is
A Non-toxic
B Non-flammable
C Non-explosive
D High boiling point
Which of the following is an undesirable property in a tower packing?
A Large surface per unit volume
B Large free cross-section
C Low weight per unit volume
D Large weight of liquid retained

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