1. Chemi-mechanical processes were originally named chemi-groundwood processes.
a) true
b) false
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
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
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
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
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
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. The Asplund process was developed about 30 years prior to TMP.
a) true
b) false
Explanation: The Asplund process was developed about 30 years prior to TMP.
8. Asplund process involves pre-steaming wood chips at temperature above the glass transition temperature of lignin.
a) true
b) false
Explanation: The Asplund process was developed about 30 years prior to TMP. It involves pre-steaming wood chips at temperature above the glass transition temperature of lignin. 550-950 kPa steam pressureat 150-170 degree Celcius
9. What is the pressure range at which the wood chips are pre-streamed?
a) 1300-1950 kPa
b) 550-950 kPa
c) 42-78 kPa
d) 1285-1950 kPa
Explanation: The Asplund process was developed about 30 years prior to TMP. It involves pre-steaming wood chips at temperature above the glass transition temperature of lignin. 550-950 kPa steam pressureat 150-170 degree Celcius.
10. What is the steam pressure range at which the wood chips are pre-heated?
a) 50-200 degree celcius
b) 300-340 degree celcius
c) 1500-2000 degree celcius
d) 150-170 degree celcius
Explanation: The Asplund process was developed about 30 years prior to TMP. It involves pre-steaming wood chips at temperature above the glass transition temperature of lignin. 550-950 kPa steam pressure at 150-170 degree Celcius.