This set of Pulp and Paper Multiple Choice Questions and Answers (MCQs) focuses on “Chemi-mechanical Pulping”.
1. Chemi-mechanical processes were originally named chemi-groundwood processes.
a) True
b) False
View Answer
Explanation: Chemi-mechanical processes were originally named chemi-groundwood processes because these chemical pre-treatments were developed and used commercially at a time when stone ground wood was the predominant mechanical process.
2. What is the full form of ESPRA?
a) Empire state paper research association
b) Entropy state pulp research association
c) Enthalpy state paper research academy
d) Empire state pound research association
View Answer
Explanation: Empire state paper research association, whose labs are in Syracuse, New York.
3. The most common chemi-mechanical process is?
a) SGW
b) PGW
c) RPM
d) CTMP
View Answer
Explanation: The pretreatments are hot sulfite or cold soda and are particularly applicable to hardwoods.
4. In hot sulfite process pressurized hot sulfite liquor is used to treat __ prior to fibration.
a) Crackers
b) Cards
c) Plates
d) Chips
View Answer
Explanation: In hot sulfite process pressurized hot sulfite liquor is used to treat chips prior to fibration. This results in brighter pulp.
5. The cold soda process was first investigated by U.S. in?
a) 2000
b) 1950
c) 1860
d) 1974
View Answer
Explanation: The cold soda process was first investigated by U.S. in as a pre-treatment prior to making RMP.
6. What is the full form of C.T.M.P?
a) Chemi-thermomechanical pulp
b) Chemi-mechanical pulp
c) Chemi-thermomechanical protein
d) Chemi-catalyst protein
View Answer
Explanation: C.T.M.P. is a process similar to TMP process except the chips are first pretreated with relatively small amounts of sodium sulfite.
7. What is the name of the process at the question mark area?
a) Chip inlet
b) CTMP
c) Liquor level
d) Liquor inlet
View Answer
Explanation: Liquor impregnation working on the pressure-expansion technique.
8. What is the name of the process at the question mark area?
a) Chip inlet
b) CTMP
c) Liquor level
d) Liquor inlet
View Answer
Explanation: Liquor impregnation making use of the pressure-expansion technique.
9. What is the name of the process at the question mark area?
a) Chip inlet
b) CTMP
c) Liquor level
d) Liquor inlet
View Answer
Explanation: Liquor impregnation utilizing the pressure-expansion technique.
10. What is the name of the process at the question mark area?
a) Chip inlet
b) Chip discharge
c) Liquor level
d) Liquor inlet
View Answer
Explanation: Liquor impregnation using the pressure-expansion technique.
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