Pulp and Paper Multiple Choice Questions on “Chemi-mechanical Pulping”.
1. Chemi-mechanical processes were originally named chemi-groundwood processes.
a) True
b) False
Answer: a
Clarification: 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
Answer: a
Clarification: 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
Answer: d
Clarification: 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
Answers: d
Clarification: 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
Answer: b
Clarification: 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
Answer: a
Clarification: 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
Answer: a
Clarification: 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
Answer: c
Clarification: 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
Answer: d
Clarification: 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
Answer: b
Clarification: Liquor impregnation using the pressure-expansion technique.
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