3 washing process, 3 tunnel washers

Which kind of soilings do you know?
1. "easily removable": dust, earth, "hard removable": oils, fats, small pigments, protein-containing soil, and "soil to be removed by bleach"
2. soil to be remobed by washing, soil to be removed by disinfection, soil to be romoved by dry-cleaning, soil to be removed by wet-cleaning
3. physically removable, chemically removable, biological removable
Different kinds of bathflow are:
1. standing bath, bath exchange
2. current flow, counterflow
3. current flow, counterflow, standing bath, bath exchange
Which one is the principle of bathflow control?
1. usage of fresh water for rinsing, continous counterflow
2. usage of fresh water for rinsing, part of rinsing water is used for main wash, remaining part in pre wash
3. fresh water inlet in the beginning of the process, continous waterflow in parallel to load
What is a problem of continous bathflow?
1. insufficient disinfection
2. carry-over of bound liquor by laundry or the mechanism of transport
3. carry-over of germs from press to pre wash area
What is a problem of counterflow?
1. location of detergents`dosage
2. profuseness of water
3. carry-over of germs from press area to the pre wash area
Which construction-parameter influence detergents`allocation?
1. time, temperature, chemistry, mechanics
2. kind of textiles and of detergents
3. kind of drums, division into compartments, bath flow, finishing department, fresh water inlet
Which operating parameters influence the allocation of the detergents?
1. kind of textiles and of detergents
2. carry-over, residual moisture, liquor ratios, cycle time
3. time, temperature, chemistry, mechanics
How can dosage influence the allocation of detergents?
1. kind of dosage: simple time-amount-dosage, conductivity measures, twofold time-amount dosage
2. the higher the dose, the better the equal distribution
3. not at all
By what is "mechanics" determined?
1. load ratio and liquor ratio only
2. drum diameter and reversing only
3. drum diameter, revolutions of drum, kind of drum movement, angle of rotation/falling angle, reversing, ribs (form, height, arrangement), load ratio, liquor ratio
The constituents of mechanics are
1. water and temperature
2. rotating, oscillating
3. rubbing, compressing, flow through
Which kind of mechanics is more advantageously?
1. rubbing
2. rotating
3. compression
Which one is the advantage of compressing as mechanical action in washing process?
1. quicker adsorption of chemistry, quicker rinse, less surface-roughing, less "pilling", no distortion of laundry
2. it is cheaper
3. no one, because compressing is not the best kind of mechanical action
How is the division of the compartments of a tunnel washer?
1. soaking zone, main wash zone I, rinse zone I, spinning zone I, main wash zone II, rinse zone II, spinning zone II
2. soaking zone, pre wash zone, main wash zone, rinsing zone, finishing zone, dewatering
3. soaking zone, main wash zone, rinsing zone, spinning zone
There are several processes for disinfection. How does thermal disinfection work?
1. 90° for 10 min or 85°C for 15 min
2. 85°C for 10 min
3. 100°C for 10 min
Thermal disinfection is capable for which materials?
1. polyester and other synthetic fibres
2. cotton
3. PES/CO blended fabrics
How does chemical-thermal disinfection work?
1. temperature and disinfection agent, 30 to 70°C, 10 to 20 min
2. temperature and disinfection agent, 90°C, 10 to 20 min.
3. temperature and disinfection agent, 85°C, 15 min
How does chemical disinfection work?
1. it does not work
2. disinfection agent, temperature 5°C, 20 min
3. disinfection agent, room temperature, 12h
Which statement is correct in relation to "cool-down"?
1. to be applied for blended fabrics, cool down for 3 to 4 K per min
2. to be applied for cotton, cool down for 3 to 4 K per sec.
3. to be applied for cotton, cool down for 10 K per min.
What is bleaching for?
1. to remove stains which cannot be removed by detergents
2. to bleach discoloration
3. no special use, applied traditionally for linen
Common bleaching proceses are
1. acetic acid, citric acid
2. H2O2, Na-perborate, Na-percarbonate, peracetic acids, chlorine bleach
3. potassium permanganate

3 washing process, 3 tunnel washers

Chapter 3 provides information about the washing process in tunnel washers