Kragmasjiene N6 — Document

April 2019 — N6 — Kragmasjiene

N6 2019 Nated Engineering

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1.1Hitte geabsorbeer deur die bespaarder in kJ/kg brandstof (2\

1.2Hitte ge absorbeer deur die oorverhitter in kJ/kg brandstof (2\

1.3Hitte geabsorbeer deur die verdamper in kJ/kg brandstof (3\

1.4roogheidsgraad ( ryness fraction van die st

1.5Temperatuur van die oorverh itte stoom wat die oorverhitter verlaat (4\

1.6Persentasie hitte wat deur die skoorsteen verlore gaan en persentasie hitte wat onverklaarbaar verlore gaan (5\ [20] (8190046\20

2.1

2.2diab ati es volumetri ese uitsettingsverhouding (

2.3Waarde van gamma (2\

2.4Ontbrekende ab solute temperatu re by die belangrikste punte (8\

2.5Hitte ontvang in kJ/kg (4\ [20] VRAAG 'n Snelheid20

3.1Gebruik 'n skaal van 1 mm = 5 m/s en ko nstrueer snelheids diagram me vir die turbine in

3.2Bepaal die volgende uit die snelheidsdiagramme

3.2.1nl aa hoek en uitlaathoek van di e eerste ry bewegende blaaie (1\

3.2.2Inlaathoek en uitlaathoek van die tweede ry bewegende blaaie (1\

3.2.3Inlaathoek van die vaste blaaie (1\

3.2.4Hoek waarteen die gas die turbine verlaat (1\

3.2.5Snelheid van die gas wat di e eerste stadium verlaat in m/s (1\

3.2.6Snelheid van die gas wat die vaste blaaie verlaat in m/s (1\

3.2.7ksiale druk ( xial thrust \at in die N in die turbine ontwikkel

4.1By die keel van die spuitstuk

4.1.1oortlike entalpie ( pecific enthalpy van die

4.1.2Snelheid van die stoom in m/s

4.1.3oortlike volume ( pecific volum van die

4.1.4

4.2By die uitgang van die spuitstuk

4.2.1Soortlike entalpie van die stoom (2\

4.2.2Dr oogheids fa tor van die stoom (3\

4.2.3Soortlike volume van die stoom (3\ [2 0] VRAAG 'n

5.1ass a van die lug wat deur die k ompressor gelewer word in kg/min (3\

5.2bsolute temperatuur van die lug na ompressi in

5.3

5.4Vir die aedruksilinder

5.4.1

5.4.2eursnee van die suier in mm en die slag lengt in mm

5.5

Mark Allocation

Sections20 + 20 + 20 + 20 = 80 marks

Paper information

TitleDocument

SubjectKragmasjiene

LevelN6

Document typeQuestion paper

Year2019

MonthApril

Pages11

Downloads4

Examination context

Decade2010s

Years ago7y

SeasonAutumn (SH)

Start dayMonday

Exam periodApril 2019

Days since exam2,750

About Kragmasjiene examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

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