Explore topic-wise MCQs in Pulp & Paper.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Pulp & Paper knowledge and support exam preparation. Choose a topic below to get started.

1.

Bleaching with H2O2, is not common for chemical pulps. (But this is changing somewhat as mills look for chlorine-free systems.) It s used for brightening mechanical pulps. What is the name of the alternative method utilized?

A. tE stage
B. tH stage
C. tP stage
D. tD stage
Answer» D. tD stage
Discussion
2.

____________ is a term used to describe each of 2 completely different methods. 1st is the utiliztion of enzymes which are isolated from decay fungi to selectively de-grade lignin.

A. tBio electric
B. tBio bleaching
C. tElectrocuting
D. tBio degredation
Answer» C. tElectrocuting
Discussion
3.

____________ and other chemicals are considered for bleaching stages, but don t enjoy commercial importance.

A. tNitrogen oxides
B. tNitrogen peroxide
C. tNitrous hydroxide
D. tHydrogen
Answer» B. tNitrogen peroxide
Discussion
4.

Lignin-Cl + NaOH and rarr;Lignin-OH + NaCl
The lignin in the E effluent gives a ____________ colour that s ultimately responsible for much of the colour of the final mill effluent.

A. tLight
B. tDark
C. tTransparent
D. tFull black
Answer» C. tTransparent
Discussion
5.

Cellulose viscosity of mechanical pulps and of high yield pulps are not measured since it s quite low .

A. tTrue
B. tFalse
Answer» C.
Discussion