There are 11 questions in this quiz. Complete it at your leasure and mail me with your score. Good Luck!
Which fault am I describing? …more usually it is the washing out of the fines and fillers into the felt and the realignment of the fibres.
Creasing
Crushing
Linting
Blowing
In the most extreme case above, whit will happen to the sheet?
The sheet will burst
The sheet will disintegrate
The sheet will flutter
The sheet will stretch
Where there is uneven tension between the couch and the first press, what type of fault are you most likely to get?
Floating
Crushing
Blowing
Creasing
A fault between the couch and the first press could be caused by poor sheet properties. What other two things may cause the problem?
Dirty felt or rolls out of alignment
Poor feeding or dirty felt
Poor feeding or rolls out of alignment
Dirty felt or poor felt tension control
Which fault is characterised by two small parallel lines in the machine direction?
Crushing
Creasing
Blowing
Linting
What three things could cause delamination of multiply products?
Too high a moisture content, too smallt a freeness difference between plies, air trapped between the plies
Too low a moisture content, too small a freeness difference between plies, air trapped between the plies
Too low a moisture content, too great a freeness difference between plies, air trapped between the plies
Too high a moisture content, too great a freeness difference between plies, air trapped between the plies
What is shadow marking due to?
Scorching, by too hot an inspection light
Removal of fines by excessive use of vacuum
Movement of fibres caused by vacuum
Removal of filler by too strong a vacuum
Which of the methods listed below is NOT a good technique for reducing shadow marking
Reduce vacuum
Increase vacuum
Use bulkier felt
Use softer press rolls
For what type of press fault would you choose one or more of the following cures? Reduce nip pressure, or use a less permeable felt, or use a reverse press or an inverse press after the offending press
Blow marks
Crease marks
Felt marks
Streak marks
If dirt is seen to be building up on a press roll, causing streaks in the sheet, what should you do?
Clean the roll
Increase the nip pressure
Clean the roll and change the doctor
Change the doctor
What four things are likely to cause picking on press rolls?
Too high a nip pressure, chemical additives in the furnish (ionic trash), Pitch, Stickies
Too low a nip pressure, chemical additives in the furnish (ionic trash), Pitch, Stickies
Incorrect size application, short fibres, Pitch, Stickies
Incorrect size application, Other chemical additives in the furnish (ionic trash), Pitch, Stickies