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
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
Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?
A Sphere
B Cube
C Cylinder (L/D = 1)
D Raschig rings
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°
Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by
A Its longer side
B Its shorter side
C The diagonal of the parallelogram which does not pass through the point of intersection of the forces
D The diagonal of the parallelogram which passes through the point of intersection of the forces
Forces acting on a particle settling in fluid are __________ forces.
A Gravitational & buoyant
B Centrifugal & drag
C Gravitational or centrifugal buoyant drag
D External, drag & viscous
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
A Equal to
B Less than
C More than
D None of these

Next steps