1. The lignin is sufficiently soft that the separation occurs at __ lamella, and fibers are left with just a hard lignin surface.
a) Upper
b) Lower
c) Middle
d) Outskirt
Explanation: The lignin is sufficiently soft that separation occurs at the middle lamella, and fibers are left with a hard lignin surface.
2. What is the other name of Masonite process?
a) Ignition process
b) Steam explosion
c) Mason process
d) TMP
Explanation: The other name of this process is called ‘steam explosion’. Chips are steamed at 180-250 degree celcius.
3. What is the temperature range at which chips are steamed in the Masonite process?
a) 1500-1690 degree Fahrenheit
b) 35-80 degree Fahrenheit
c) 155-480 degree Fahrenheit
d) 335-480 degree Fahrenheit
Explanation: The other name of this process is called ‘steam explosion’. Chips are steamed at 180-250 degree celcius.
4. What is the range of yield in the Masonite process.
a) 50-60%
b) 40-30%
c) 80-90%
d) 10-20%
Explanation: In fiberboard the fibers are held together by resins such as phenol-formaldehyde. The yield is 80-90%.
5. Chips are steamed well above the glass transition temperature of lignin, for one to two minutes until final pressure is on the order of __ MPascal.
a) 14-20
b) 4-7
c) 19-25
d) 3-4
Explanation: Chips are steamed well above the glass transition temperature of lignin, for one to two minutes until final pressure is on the order of 4-7 MPascal.
6. A mild explosion pulping process is being used at one mill to process __ paper.
a) Recycled
b) Un-used
c) Over-used
d) Bloated
Explanation: A mild explosion pulping process is being used at one mill to process recycled paper.
7. High yield chemical pulling is the other name of semi-chemical process.
a) true
b) false
Explanation: This is named so, because the yield is 60-80%
8.Natural Sulfite Semi-Chemical is the full form of N.S.S.C. process. This is the most common method..
a) true
b) false
Explanation: The full form of N.S.S.C. is Neutral Sulfite Semi-Chemical process.
9. What is the name of the process where chips are impregnated with cooking liquor, the free liquor is drained or otherwise removed.?
a) Vapor-phase pulping
b) Liquid-phase pulping
c) Saturated-phase pulping
d) Differential-phase pulping
Explanation: Vapor-phase pulping is the name of the process where chips are impregnated with cooking liquor, the free liquor is drained or otherwise removed.
10.What is the name of the process which involves steps like mild chemical treatment and followed by moderate mechanical refining.?
a) Semi-chemical process
b) Vapor-chemical process
c) Differential-chemical process
d) Saturated-chemical process
Explanation: Semi-chemical pulping is the name of the process which involves steps like mild chemical treatment followed by moderate mechanical refining are executed