Elektrovakteorie N3 — Document

April 2018 — N3 — Elektrovakteorie

N3 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 7 pages 📝 62 items found

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Q1— Section header —

1.1Bestudeer die kringdiagram en beantwoord die vrae. FIGUUR 1

1.1.1Noem die kleurkodering vir lewendig deur letter A aangedui, neutraal deur letter B aangedui en aarding, deur letter C aangedui. (3\

1.1.2Noem die grootte van die geleiers A & B wat in

Q1— Section header —

1.1.3Wat is die grootte van die stroombreker, aangedui deur die letter D, vir die stroomkring? (1\

1.1.4Identifiseer die komponente wat deur letters E en F aangedui word. (2\

1.2tipe geiser aangetref word. (3\ [10]10

Q2— Section header —

2.1wat van Lin na Luit gekoppel is , en dui die volgende op die skets aan. Uitklinkskakelaar Elektriese koord/buigsame leiding Bimetaalstrook Veerstaal

2.2Verduidelik hoe die volgende in die bostaande stroombreker bereik word:

2.2.1Tydvertraging

2.2.210

Q3— Section header —

3.1fluoresseerlamp se stroomkring aan. Noem die komponente wat in die skets aangedui word deur slegs die naam van elke komponent langs die vraagnommer (3.1.1

3.1.5

3.2fluoresseerlamp se stroomkring benodig word. (2\

3.3Noem DRIE toepassings waar natriumlampe gebruik kan word. (3\ [10] 1104126310

Q4— Section header —

4.1Gemiddelde waarde (2\

4.2Frekwensie van die golf (2\

4.3Periode (1\

4.4Kruinfaktor (2\

4.510

Q5— Section header —

5.1Bereken die induktiewe reaktansie. (3\

5.2Bereken die kapasitiewe reaktansie. (3\

5.3Dui aan of die stroom in hierdie stroomkring lei of naloop. Verduidelik waarom dit die geval is. (2\

5.4tekening hoef nie volgens skaal te wees nie. (2\ [10] 1104126310

Q6— Section header —

6.1motor word in ster aangesit en loop in delta. Bereken die fasespanning wanneer die aansitter in die volgende posisie is:

6.1.1Sterposisie (2\

6.1.2Deltaposisie (1\

6.2nalooparbeidsfaktor van 0,86. Bereken:

6.2.1Skyndrywing (2\

6.2.2

6.2.3Fasestroom van die motorwikkeling (3\ [10]10

Q7— Section header —

7.1.1Metode om werwelstroom te verklein

7.1.2

7.2

7.2.1Die windingsverhouding

7.2.2

7.2.3Die grootte van die transformator in MVA (2\ [10] 1104126310

Q8— Section header —

8.1masjien:

8.1.1Laers

8.1.2Kommutator/stroomwender

8.1.3Hulppole

8.1.4

8.2motor aangesit word. (2\ [10]10

Q9— Section header —

9.1Verduidelik wat met sinchrone spoed bedoel word met verwysing na driefasige induksiemotors. (1\

9.2Noem enige DRIE tipes enkelfasige WS motors. (3\

9.3

9.4Noem TWEE nadele van motors met bewikkelde rotors. (2\ [10]10

Q10— Section header —

10.1Noem TWEE tipes draaiyster instrumente. (2\

10.2.1een diode gebruik (3\

10.2.2Golfvorms om die insetgolf en uitsetgolf van die stroomkring in

Q10— Section header —

10.3(1\ [10] TOTAAL: 100 11041263 52010

Mark Allocation

Total100 marks

Sections10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100 marks

Paper information

TitleDocument

SubjectElektrovakteorie

LevelN3

Document typeQuestion paper

Year2018

MonthApril

Pages8

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,117

About Elektrovakteorie examination preparation

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