HPCL Visakh Refinery Lab Analyst Paper

Objective Questions on Polymer Blends and Alloys

If you are appearing Hindustan Petroleum Corporation Limited Visakh Refinery Lab Analyst Recruitment exam 2020 and searching HPCL Boiler Technician Previous Year Paper/ Model Paper/ Sample Paper then you are at right place. Here, we are publishing Lab Analyst question paper for your practice.

The mixing of two polymers yield
(a) Poly blend
(b) Block copolymer
(c) Alternating copolymer
(d) None of these

Polymer made of different repeating units are called
(a) Hompolymer
(b) Hetropolymer
(c) Both (a) & (b)
(d) None of these

Polar polymer is
(a) PV acetate
(b) Polyvinyl alcohol
(c) Polyethylene
(d) All of the above

What happens in the adhesion to make polymer blend compatible?
(a) Increases
(b) Decreases
(c) becomes zero
(d) None of these

In polyblends weight of polymers are
(a) equal
(b) unequal
(c) both (a) & (b)
(d) None of these

Useful blends have dispersion
(a) Uniform
(b) Non Uniform
(c) (a) & (b) both
(d) None of these

A polymer blend of two amorphous polymers have processing temperature
(a) Above the Tg of both
(b) Below the Tg of both
(c) Average of both Tg’s
(d) None of these

The changes found in melt mixing process of polyblends
(a) Thermal degradation
(b) Gel effect
(c) No effect
(d) None of these

From mechanical polyblend, we found
(a) Black copolymer
(b) Craft copolymer
(c) Both (a) & (b)
(d) None of these

Random crosslinking of mechanical polyblends gives
(a) Mutual grafting
(b) Inter crosslinking
(c) Both (a) & (b)
(d) None of these

What do solvent do in the mixing temperature of solution cast polyblends?
(a) Decreases
(b) Increases
(c) Unchanged
(d) None of these

Polymers random co-crosslinking gives polyblend type
(a) Latex
(b) Solution
(c) Mechanical
(d) Mechanio chemical