Motor Electrical Theory N1 — Document
August 2021 — N1 — Motor Electrical Theory
N1
2021
Nated Engineering
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Q1— Section header —
1.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (1.1.1
1.1.10\in the ANSWER BOOK.
1.1.1The circuit that includes the ignition system and fuel injection engine management system.
1.1.2The driving force behind the flow of electricity in an electrical resistance. static electricity. voltage. electric current.
1.1.3This particle in an atom that carries no electrical charge Proton
1.1.4electrical flow. potential pressure. potential difference. electrical current.
1.1.5
1.1.6north to south. south to north. north to the centre of the bar
1.1.7he component that does not form part of the primary circuit in conventional ignition system.
1.1.8This component provides an air gap for the ignition spark to jump Rotor Spark plug Distributor cap
1.1.9A battery is regarded as fully discharged when the voltage across 10
1.1.10To measure the specific gravity of the electrolyte in a lead acid battery, one oad tester.
1.2Indicate whether the following statements are TRUE or FALSE by writing only rue' or ' alse' next to the question number (1.2.1
1.2.10\in the ANSWER BOOK.
1.2.1Maintenance free batteries do not require regular maintenance.
1.2.2LED lights consume less power than conventional incandescent globes.
1.2.3Parking lights are also disabled when the main relay is turned off by the ignition switch. 11040601 Copyright reserved
1.2.4Fog lamps are traditionally used to improve visibility in snowy conditions.
1.2.5If this warning lamp lights up, it means that the headlights are broken
1.2.6Bour do n tube is used in the manufacture of both electrical and mechanical pressure gauges.
1.2.7Fuses are built into electrical circuits to protect the circuit from overload.
1.2.8Window demisters are regarded as auxiliary electrical equipment.
1.2.9In light rain conditions the driver will select the intermittent function of the wipers.
1.2.1020
Q2— Section header —
2.1Three cells of 3 each are connected in series. Calculate the total EMF over the three cells. (1\
2.2Three resistors of 3 , 5 are connected in series. Calculate the total resistance offered by the resistors. (1\
Q2— Section header —
2.3.1Determine the total current flowing through the circuit. (2\
2.3.2 Determine the volt age drop across each resistor. (6\
2.4Name ONE type of insulator used in automotive wiring. (1\ [15] 1104060115
Q3— Section header —
3.1Sketch a transistor in a common emitter configuration. Indicate the input and output signals. (6\
3.2List THREE properties of the transistor
Q3— Section header —
3.3Match the test instrument with the type of battery test by writing only the letter (A C\ next to the question number (3.3.1
3.3.3in the ANSWER BOOK.
3.3.1Hydrometer A Electrolyte pecific gravity
3.3.2Load tester B Battery voltage
3.3.3oltmeter C High rate discharge (3\
3.4Name THREE types of batteries used in automotive applications. (3\ [15]15
Q4— Section header —
4.1Explain the main disadvantage of conventional battery coil ignition system. (3\
4.2Make a neat labelled sketch of a conventional oil filled coil. (7\
4.3Explain how high voltage spark is generated in the ignition coil. (5\ [15]15
Q5— Section header —
5.1List FIVE important exterior lights on motor vehicle. (5\
5.2Sketch a simple electrical circuit utilising the following components ump motor Battery Ignition switch Pump switch Relay Fuse
5.3Explain the operating principle of a relay (2\ [15] (11040601\ Copyright reserved15
Q6— Section header —
6.1Explain the term reluctance as it applies to magnets and indicate how it can be
6.2Draw a simple bar magnet indicating the magnetic lines and direction. (4\
6.3State the TWO most common semiconductor materials in the manufactur ing of transistors. (2\
6.4Draw a simple block diagram of an NPN transistor. Indicate the different connections. (3\
6.5State TWO types of reciprocating electrical petrol pumps. (2\
6.6State TWO types of indicator flasher units (2\
6.7Draw a simple line diagram of a heat gauge circuit. Include the battery and the ignition switch. (5\ [20] TOTAL 10020
Topics Identified
1
Leadership
Mark Allocation
Total100 marks
Sections20 + 15 + 15 + 15 + 15 + 20 = 100 marks
Paper information
TitleDocument
SubjectMotor Electrical Theory
LevelN1
Document typeQuestion paper
Year2021
MonthAugust
Pages7
Downloads3
Examination context
Decade2020s
Years ago5y
SeasonWinter (SH)
Start daySunday
Exam periodAugust 2021
Days since exam1,898
About Motor Electrical Theory examination preparation
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A practical revision approach
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