Elektrotegniek N4 — Document

April 2018 — N4 — Elektrotegniek

N4 2018 Nated Engineering

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🎯 100 marks 📄 7 pages 📝 36 items found

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1.1Verskeie opsies word as moontlike antwoorde op die volgende vrae gegee. Kies die antwoord en skryf slegs die letter (A D\ langs die vraagnommer (1.1.1

1.1.10in die ANTWOORDBOEK neer

1.1.1Die DRIE hoofdele van n induksiemotor Rotor,

1.1.2Die d oel van n kapasitor in n eenfas kapasitormotor

1.1.3DRIE maniere om ankerreaksie te oorkom Lugverkoeling, verminder die spoed en handbewerking Vergroot borsels, verskuif wikkelings en gebruik

1.1.4Vloedwisseling kan verkry word deur ie stroom in die kring te verander

1.1.5Die doel van die uitsittenk op n transformator

1.1.6DRIE maniere om transformators af te koel Olie ver koeling, natuurlike verkoeling en

1.1.7Glip word soos volg gedefineer Die verskil tussen rotorspoed en sinchrone spoed

1.1.8Watter motor is die doeltreffendste en word die meeste gebruik vir alle soorte motors? Indu

1.1.9TWEE soorte voerders wat in n transmissiestelsel gebruik word Vierkantig en sirkel

1.1.10Die spanning van n omtakgenerator kan dalk faal om op te wek omdat die

2.1n Seriekring van onderskeidelik 8 ohm en 5 ohm is in parallel geskakel oor

2.2n Oorhoofse lyn va n kopergeleier, 16 m lank met n deursnee van 1 mm, is in staat om 10 A te dra

2.3n Spoel het 200 windings As n stroom van

3.1n Spoel van 350 windings het n vloed van 4,8 mWb wat daarmee skakel

3.2n Battery met n EMK van 36 V en n inwendige weerstand van 0,5 ohm word in parallel geskakel

3.3Noem enige TWEE uitwendige eienskappe van serie parallel generators (2\

3.4Defineer die wet van Lenz (2\ [18] VRAAG18

4.1Gelykstroommasjiene ( DC machines word benoem volgens die metode wat gebruik word om die veldspoele te verbind. Verduidelik kortliks hierdie stelling. (8\

4.2Verduidelik kortliks hoe jy die uitwerking van ankerreaksie kan oorkom. (3\

4.3Wat is die doel van poolskoen ( pole shoe n gelykstroommotor (2\

4.4Noem enige VYF soorte kapasitors (5\ [18] 808007418

5.1In n sekere stroombaan met twee paralleltakke word die oombliklike takstrome deur die volgende ve rteenwoordig

5.2n Spoel met n weerstand van 5 ohm en n induktiewe reaktansie van 3 ohm is

5.2.1Bereken die grootte van die toevoerstroom as die stroombaan aan n 230 V AC toevoer gekoppel is (5\

5.2.2Bereken die stroom wat in elke tak van die stroombaan versprei word. (4\ [18] VRAAG18

6.1

6.1.1

6.1.2

6.1.3ie maksimum waarde van die kernvloed (3 2\

6.2n Eenfasemotor trek n stroom van 12 A uit n 225 V, 50 Hz toevoer. Die stroom het n naloopfasehoek van

6.2.1

6.2.2

6.3n Draaispoelinstrument het n weerstand van 240 ohm en benodig 50 mA om n vol le

6.4Beskryf die konstruksie van die stator van n splitfase WS AC motor.

Mark Allocation

Total100 marks

Sections10 + 18 + 18 + 18 + 18 + 18 = 100 marks

Paper information

TitleDocument

SubjectElektrotegniek

LevelN4

Document typeQuestion paper

Year2018

MonthApril

Pages9

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,115

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