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Q1— Section header —
1.5\in the ANSWER BOOK.
1.1Coniferous woods are also called hard woods.
1.2A thermomechanical ulping process converts wood log into chips.
1.3Evaporation is a process whereby a liquid is heated to a temperature at which it changes into vapour.
1.4Conventional drying uses metal cylinders arranged in two rows one on top of the other.
1.55
Q2— Section header —
2.5\ t he ANSWER BOOK. COLUMN COLUMN
2.5The off cuts obtained when the paper is cut A used cooking liquor from Kraft cook A process that uses raw materials bought from external suppliers to produce cooking liquor system
Q3— Section header —
3.5\ the ANSWER BOOK.
3.1A ring around the heartwood of a tree.
3.2The water cycle circuit from the thickener back to the showers.
3.3The process of increasing water vapour content of a gas.
3.4The first part of the paper machine, consisting of wire and press.
3.55
Q4— Section header —
4.1What was the main material used in Egypt to make writing materials? (1\
4.2Steam used in pulp and paper mill is produced by burning coal, oil or gas.
4.2.1State TWO applications of steam in pulp and paper manufacturing. (2\
4.2.2Give TWO ways of producing steam. (2
4.3Describe de inking as a process used to remove contrar ies from secondary fibres. (5\
4.4List FOUR fibrous materials used to manufacture paper, board and tissue (4\
4.5Name TWO types of reaction wood (2\
4.6What is the main cause of wood decay? (1\ [17] 605037217
Q5— Section header —
5.1Define the f ollowing terms that causes disturbance in the printing process.
5.1.1Picking
5.1.2Linting
5.1.3
5.2State FOUR factors affecting the smoo thness of paper. (4\
5.3What are the THREE requirements for outdoor storage of logs? (3\
5.4State THREE factors that influence bark removal. (3\
5.5Give FOUR examples of contaminants found in chips (4\ [20]20
Q6— Section header —
6.1Complete the diagram of a batch digester given below by naming the parts (A J\ in the ANSWER BOOK. (10\
6.2Define cooking liquor (2\
6.3Brie fly discuss the production of unslaked lime. (7\
6.4Give THREE reasons why chemical recovery was not used until 1930s. (3\
6.5What is the advantage of using multiple effect evaporators in a chemical recovery system? (2\ [24]24
Q7— Section header —
7.1Describe the purpose of the approach flow system (3\
7.2State THREE primary functions of press section (3\
7.3Drying of the web is achieved by using forming, press and dry end sections. From the sections given above , answer the follow ing:
7.3.1Which section removes water from the web by thermal energy or evaporation process?
7.3.2Which section uses mechanical compression to remove water from the web
7.3.3Which section uses gravity or vacuum to remove water?
7.3
7.4Define the dry end section (2\
7.5List FIVE combinations in extrusion lamination (5\
7.6What is the purpose of coating in the finishing process? (2\
7.7Give FIVE advantages of water borne adhesives in flexible packaging lamination (5\ [24] TOTAL SECTION B:24