Armature Winding N2 — Document

April 2021 — N2 — Armature Winding

N2 2021 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 40 items found 📚 1 topics

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.1Name TWO main types of winding in DC (2\

1.2Make TWO neat diagrams to indicate the difference between progressive and retrogressive winding. (4\

1.3What is the purpose an overload coil in a DC starter? (3\

1.4Explain Faraday s law of electromagnetic induction. (3\

1.5Make a simple drawing to shown how a field coil can be tested by using transformer test (4\

1.6Make a neat diagram to show the characteristics of a series generator. (4\

1.7Name TWO methods used to counteract armature reaction. (2\ [22]22

Q2— Section header —

2.1Draw a neat diagram of a se lf excited shunt generator (6\ 2. Name

2.3An eight pole lap wound armature rotate at 480 rpm and is required to deliver 00 V. The flux per pole is 0,888

2.4The armature current of a DC shunt machine is 10 A. The motor is operating at terminal voltag e of 220

2.4.1Generator (2\

2.4.2Motor (2\ [20]20

Q3— Section header —

3.1A split phase motor has been brought to your company f or a rewind. Make a neat detailed data sheet that can be used to rewind that motor to the original specification s.

3.2Name FOUR tests that can be done on an armature after rewind ing (4\

3.3Explain the following term

3.3.1Sc reen rotected type

3.3.2Drip proof type

3.3.320

Q4— Section header —

4.1A series RL circuit consists of the following components: R = 20 ; L = 25 mH. These components are connected across supply of 200 V/50 Hz.

4.1.1The inductive reactance of the coil (2\

4.1.2The impedance of the circuit (2\

4.1.3The current in the circuit (2\

4.1.4Phase angle between the current and the voltage (2\

4.1.5The volt age drops across each component (4\

4.2Draw a neat diagram of a capacitor start and run motor. (4\

4.3Name TWO types of capacitors. (2\

4.4What is the purpose of the centrifugal switch in a split phase motor? (2\ [20]20

Q5— Section header —

5.1Draw a neat diagram of a three phase wound rotor induction motor. (5\

5.2How would one reverse the direction of rotation of a three phase slipring moto r? (2\

5.3Make a neat label ed diagram of a basic transformer. (3\

5.4Explain the term eddy currents. (2\ (11020042\ Copyright reserved

5.5A single phase transformer has 600 turns on the primary winding supplied from 220 volts AC Determine the following:

5.5.1he number of turns on the secondary winding if it is required to supply a secondary voltage of 16 volts.

5.5.2The primary current if the secondary current is 5A.

5.5.318

Multiple Choice Options

A)The motor is operating

Topics Identified

Forms of Ownership

Mark Allocation

Total100 marks

Sections22 + 20 + 20 + 20 + 18 = 100 marks

Paper information

TitleDocument

SubjectArmature Winding

LevelN2

Document typeQuestion paper

Year2021

MonthApril

Pages5

Downloads4

Examination context

Decade2020s

Years ago5y

SeasonAutumn (SH)

Start dayThursday

Exam periodApril 2021

Days since exam2,020

About Armature Winding examination preparation

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A practical revision approach

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File size195.9 KB

Pages5

Archived on8 September 2026

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