Pulp and Paper Multiple Choice Questions on “Soda Pulping”.
1. Soda pulping was invented in which country?
a) France
b) England
c) U.S.A
d) Vietnam
Answer: b
Clarification: Soda pulping was invented in England by Burgess and Watts in 1851, uses sodium hydroxide as cooking chemical.
2. Soda pulping uses sodium hydroxide as cooking chemical.
a) True
b) False
Answer: a
Clarification: Soda pulping’s a chemical process for making wood pulp with NaOH as the cooking chemical. In the Soda-AQ process, anthraquinone (AQ) may be used as a pulping additive to decrement the carbohydrate degradation.
3. The soda process has limited use for easily pulped materials and for major process.
a) True
b) False
Answer: a
Clarification: The soda process has limited use for easily pulped materials like straws and some hardwoods, and for major process.
4. What is used as a pulping additive to decrease carbohydrate de-gradation?
a) Anthraquinone
b) Metaquinone
c) Quadraquinone
d) Doublaquinone
Answer: anthraquinone, also called anthracenedione or dioxoanthracene, is an organic compound with formula C 14H 8O 2.
5. What is the recent development in the field of soda pulping?
a) Use of N
b) Use of CO2
c) Use of Cl
d) Use of oxygen
Answer: d
Clarification: This invention relates to the manufacture of wood pulp and particularly to a two-stage soda pulping process in which the second stage is carried out in the presence of oxygen.
6. The Soda-AQ process, anthraquinone (AQ) might be utilized as a pulping additive to __________ the carbohydrate degradation.
a) Increase
b) Decrease
c) Maintain
d) Stop
Answer: b
Clarification: The Soda-AQ process, anthraquinone (AQ) are utilized as pulping additive to decrement in the carbohydrate depletion.
7. Around __________ of paper production around whole world is produced from agricultural crops.
a) 5 – 10%
b) 20 – 25%
c) 35 – 45%
d) 55 – 65%
Answers: a
Clarification: Around 5%-10% of paper production in the whole world is produced by agricultural crops which has valued agricultural paper production between $5 billion and $10 billion.
8. Valuing agriculture paper production at between ___________ billion.
a) 5 – 10
b) 15 – 20
c) 25 – 30
d) 45 -50
Answers: a
Clarification: Around 5%-10% of paper production worldwide is produced from agricultural crops, valuing agricultural paper production at between $5 billion and $10 billion.
9. Due to the ease with which bagasse can be chemically pulped, bagasse requires _____________ bleaching chemicals than wood pulp.
a) More
b) Less
c) No
d) 80%
Answers: b
Clarification: Due to the ease with which bagasse can be chemically pulped, it requires less bleaching chemicals than the wood pulp.
10. Moderate amounts of __________ can be controlled with purging lime mud or lime kiln ash.
a) Carbonate
b) Silicate
c) Aluminate
d) Carbonsulfate
Answer: b
Clarification: Silicates’ moderate amount can be controlled with purging lime mud or lime kiln ash.
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