D:-NR
Correct Answer:- Option-D
Question49:-A DSC can measure
A:-Heat capacity
B:-Glass transition temperature
C:-Melting point
D:-Alll of these
Correct Answer:- Option-D
Question50:-Compression set at constant stress is measured using
A:-Constant load
B:-Constant strain
C:-Variable strain
D:-Variable temperature
Correct Answer:-Question Cancelled
Question51:-A parison is used in
A:-Blow moulding
B:-Transfer moulding
C:-Compression moulding
D:-None of these
Correct Answer:- Option-A
Question52:-PET is not used in extrusion blow moulding because
A:-High viscosity
B:-High die swell
:-Low melt strength
D:-Shark skin effect
Correct Answer:- Option-C
Question53:-Which of the following is amenable to reaction injection moulding?
A:-PET.
B:-TPU
:-NYLON
D:-PU
Correct Answer:- Option-D
Question54:-RRIM is used when
A:-Good strength is needed
-Fast reaction is needed
C:-High volume output is needed
D:-None of these
Correct Answer:- Option-A
Question55:-In a two roll mill the shear rate is adjusted by
A:-reducing nip gap
increasing roll speed ratio
C:-both of these
D:-none of these
Correct Answer:- Option-C
Question56:-The effect of roll bending in calendaring operation is reduced by
A:-Roll crossing
B:-Roll crowning
C:-Roll bending
D:-Alll of these
Correct Answer:- Option-D
Question57:-The role of a plug in a plug-assisted thermoforming is to help
A:-Maintain uniform thickness
-Permit deep drawing
C:-Both of these
D:-None of these
Correct Answer:- Option-C
Question58:-In a Banbury the rotors can be
A:-Intermeshing
B:-Non-intermeshing