Pulp And Making Technology NCV Level 4 — Exam Paper P1

November 2018 — NCV Level 4 — Pulp And Making Technology

NCV Level 4 2018 NCV Engineering

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🎯 10 marks ⏱️ 3h 📄 6 pages 📝 43 items found 📚 1 topics

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Q1— Section header —

1.5\ in the ANSWER BOOK. Correct statement if it is FALSE.

1.1A cylindrical rotor is more favourable because it ensures a uniform flow in the axial direction relat ive to the pressure screen.

1.2The sheet leaving the forming section contains about 20% water.

1.3Drying takes place in four stages namely the warm p stage, cooling stage, falling rate stage and bond

1.4Spent l iquor produced fr om the soda process is called weak black liquor.

1.55

Q2— Section header —

2.10\in the ANSWER BOOK. COLUMN A COLUMN B

2.10Brightness Steam heater Heating value Vacuum Water so luble sodium Falling

Q3— Section header —

Q4— Section header —

4.1Orifice plate

4.2Kappa number

4.3Scal

4.4Wet strength

4.5Streaking (5 2\ [10] TOTAL SECTION A: 25 SECTION B10

Q5— Section header —

5.1During refining the paper s properties change. State FIVE ways in which the individual fibres are affected by refining. (5\

5.2Explain the principle of operation of a pressure screen. (6\

5.3When would the thickening process be clas sified as functioning poorly? (3\

5.4Why is freeness an important factor during thickening? (2\ [16]16

Q6— Section header —

6.1State the advantages of forming fabrics ma de from polyester monofilaments. (3\

6.2Describe FOUR conse quences of uneven formation. (4\

6.3Name and discuss THREE factors that affect drainage at the forming board (6\

6.4How does increased pressure at the press section affect sheet opacity? (2\ [1 6050394

Q7— Section header —

7.1Sta te FIVE quality requirements for carton boxes (5\

7.2Name TWO types of radiant heaters (2\

7.3Give FOUR reasons for testing paper (4\

7.4State SIX characteristics of the winder. (6\ [1

Q8— Section header —

8.1Name TH REE main factors that affect the quality of liquor (3\

8.2Name the most expensive and important unit in a Kraft chem ical r ecovery plant and state TWO of its functions. (3\

8.3The most common cause of explosions in furnaces is tube failure. State FOUR conditions that cause tube failure. (4\ 8. How is the magnesium oxide recovery furnace different from the soda

Q9— Section header —

9.1Give the chemical equation of each of the following reactions:

9.1.1 Causticising

9.1.2 Slaking

9.1.3Calcining 2\ (6\

9.2What problems occur as a result of high sodium content during unslaked lime production and how can it be avoided? (3\

9.3Brief ly explain the operating principle of a waste heat boiler. (4\ [1

Topics Identified

Business Functions

Mark Allocation

Total100 marks

Sections5 + 5 + 5 + 10 + 16 = 41 marks

Paper information

TitleExam Paper

SubjectPulp And Making Technology

LevelNCV Level 4

Document typeQuestion paper

Year2018

MonthNovember

Pages6

Downloads2

Examination context

Decade2010s

Years ago8y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2018

Days since exam2,901

About Pulp And Making Technology examination preparation

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