Papermaking & Coating Course

What are the three main categories of vegetable fibre?
1. Hardwood, Softwood and Non-wood
2. Hardwood, Softwood and Mechanical
3. Chemical, Softwood and Non-wood
4. Hardwood, Mechanical and Non-wood
What do mechanical fibres contain that chemical fibres do not?
1. Cellulose
2. Lignin
3. Hemicellulose
4. Ash
What three actions are performed on a fibre by a refiner?
1. Cutting, internal fibrillation, and external fibrillation
2. Cutting, internal fibrillation and delamination
3. Internal fibrillation, external fibrillation and delamination
4. Wetting, drying and delamination
What is claimed to be the major advantage of the dilution flowbox?
1. Better cross direction basis weight profile
2. Better machine direction basis weight profile
3. Better cross direction moisture profile
4. Better machine direction moisture profile
What are the two major types of base paper curl?
1. Machine direction curl and cross direction curl
2. Structural curl and cross direction curl
3. Treatment curl and machine direction curl
4. Structural curl and treatment curl
Which commonly measured base sheet property is also known as ‘crack propagation’.
1. Fold
2. Tear
3. Tensile
4. Burst
What is TEA?
1. The total energy required to stretch the paper
2. The tensile strength of the paper
3. The burst strength of the paper
4. The total energy required to break the paper
Coating colour raw materials fall into three major groups, what are they?
1. Pigment, binders and additives
2. Solids, liquids and gasses
3. Pigments, binders and co-binders
4. Solids, viscosity and additives
Which coating colour material absorbs light and re-emits it at a different wavelength?
1. CMC
2. Latex
3. Clay
4. OBA
Yankee and MG cylinders should never be left stationary or they will deform under Which coating colour ingredient is also used in meat pies, milk shakes and wallpaper paste?
1. OBA
2. CMC
3. Latex
4. Clay
Which of the following statements is true?
1. Water exhibits Newtonian flow and custard powder exhibits dilatant flow
2. Water exhibits Newtonian flow and custard powder exhibits thixotropic flow
3. Water exhibits thixotropic flow and custard powder exhibits dilatant flow
4. Water exhibits thixotropic flow and custard powder exhibits Newtonian flow
Which pigment in the list below has the greatest opacity?
1. Titanium Dioxide
2. Calcium Carbonate
3. Clay
4. Gypsum
One way to remove excess coating from the web is the air knife. Which of the following three systems can also be used?
1. Bent blade, Stiff blade, Meyer bar
2. Bent blade, Stiff blade, Jet coater
3. Bent blade, Fountain Coater, Meyer bar
4. Curtain Coater, Stiff blade, Meyer bar
What type of water retention should a coating colour have?
1. High
2. Low
3. Medium
4. None
Which one of the following base paper properties would be the most likely to cause print mottle?
1. Poor sizing
2. Poor drying
3. Poor filler retention
4. Poor squareness
Which one of the following coating processes properties would be the most likely to cause print mottle?
1. Poor drying
2. Poor coating application
3. Poor reeling
4. Poor slitting
Both base paper and coating colour go through the same three stages of drying. What are they?
1. Warm-up, constant evaporation, reducing evaporation
2. Warm-up, constant evaporation, cooling
3. Warm-up, increasing evaporation, reducing evaporation
4. Warm-up, increasing evaporation, constant evaporation
What fault could be caused if the coating is dried too quickly in the initial drying phase?
1. Blistering
2. Starring
3. Glazing spots
4. Roping
How should reel tension be set up through the reel?
1. High to low
2. Constant
3. Low to high
4. High-Low-High
Other than insufficient binder in the coating colour mix, which one of the following is the most likely causes to result in coating pick?
1. Binder migration
2. Too much latex
3. The immobilisation point
4. Too little pibment

Papermaking & Coating Course

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