Related Questions

In the kraft (sulphate) process for the paper manufacture, the digestor is made of
A Cast iron
B Stainless steel
C Karbate carbon
D Wrought iron
In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of
A Concrete
B Wood
C Steel
D Porcelain
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
A Avoid mechanical weakening of fibre
B Remove lignin by way of crystallisation
C Increase the cellulose content
D None of these
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with
A Acidic refractory
B Rubber
C Karbate
D Lead or acid-proof bricks
Paper pulp produced by kraft/sulphate process is
A Bleached easily
B Dull white in color
C Strong fibrous
D Dark colored
The most economical pulp for the production of newsprint would be the __________ pulp.
A Groundwood
B Sulphate
C Sulphite
D Semichemical
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
A 75
B > 30
C 50
The ideal pulp for the manufacture of paper should have high __________ content.
A Cellulose
B Lignin
C Both A & B
D None of these
Digestion of wood-base materials (for manufacture of pulp) is done to
A Remove lignin
B Produce long fibres
C Prevent deterioration on storage
D None of these
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A Cutting
B Fibrillation
C Hydration
D Strengthening

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