Download 5464 Explain automotive electrical and electronic applications

NZQA Expiring unit standard
5464 version 5
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Title
Explain automotive electrical and electronic applications
Level
3
Credits
12
Purpose
This theory based unit standard is for people in the automotive
repair industry. People credited with this unit standard are able
to demonstrate knowledge of the following used in automotive
circuits: inductance; capacitors and chokes; resistors; AC
(alternating current); semi-conductors; transistors; amplifier
application; silicon controlled rectifiers (SCR's) and thyristors;
digital fundamentals; display devices; multiplex wiring;
microprocessors. People are also able to create series-parallel
circuits using resistors, calculate voltage and current
distribution, and calculate values of power, given any two of
voltage, current, or resistance values.
Classification
Motor Industry > Automotive Electrical and Electronics
Available grade
Achieved
Entry information
Unit 232, Test an automotive electrical circuit, or demonstrate
equivalent knowledge and skills.
Critical health and
safety prerequisites
Explanatory notes
None.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of inductance for automotive applications.
Evidence requirements
1.1
Types of magnetic fields are described by showing the lines of flux.
Range
1.2
around a coil, around a magnet, around a conductor.
The principle of inductance is described according to Lenz's Law.
Range
self inductance, mutual inductance.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
1.3
Magnetic properties of materials are identified.
Range
1.4
5464 version 5
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air, ferrite.
Magnetic curves are expressed in diagram form.
Range
hysteresis of hard and soft iron.
Outcome 2
Demonstrate knowledge of capacitors and chokes for automotive applications.
Evidence requirements
2.1
Factors that affect capacitance are explained in terms of plate area, distance
apart, and dielectric material.
2.2
Types of capacitors are identified and their applications defined.
Range
oil, electrolytic, plastic.
2.3
Capacitor operation is described by plotting charge and discharge of voltage
and current.
2.4
Types of chokes and their application are described according to
manufacturer’s specifications.
Range
iron (ferrite) cored, air cored.
Outcome 3
Demonstrate knowledge of resistors used in automotive electronic applications.
Range
light dependent resistor (LDR), voltage dependent resistor (VDR), temperature
dependent resistor (TDR).
Evidence requirements
3.1
Types of resistors used for automotive electronic circuits are identified from
manufacturer's manuals and catalogues.
3.2
Operational characteristics of each of the range of resistors are explained
according to manufacturer’s specifications.
3.3
The effects of temperature change on resistors are explained according to
manufacturer’s specifications.
Range
positive temperature co-efficient (PTC), negative temperature coefficient (NTC).
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 3 of 8
Outcome 4
Demonstrate knowledge of AC (alternating current) used in automotive applications.
Evidence requirements
4.1
Frequency of AC is calculated from a given signal on an oscilloscope.
Range
4.2
AC values relating to automotive applications are derived by reference to an
oscilloscope trace of a signal generator and transformer.
Range
4.3
sine curve terms.
peak values, average value, RMS (root mean square).
Impedance in an AC circuit containing capacitance, inductance, and resistance
is explained in terms of the effects on lead and lag of voltage and current.
Outcome 5
Demonstrate knowledge of semi-conductors used in automotive applications.
Evidence requirements
5.1
p-n junction characteristics are identified.
Range
5.2
positive and negative charged electron transfer, forward bias,
reverse bias.
Diode operation is identified.
Range
rectifier diode, Zener diode, light emitting diode (LED), photo
diode.
5.3
Rectification patterns are identified by sketching AC halfwave and fullwave
forms.
5.4
Diode ratings for a given automotive application are stated.
Range
wattage, current, forward and reverse voltage.
5.5
Use of diodes in an automotive application is described in terms of a dual
charging system, transient protection, and a Zener diode as a voltage stabiliser.
5.6
Replacement procedure for a diode in an automotive circuit is described
according to diode manufacturer's specifications.
Range
rectifier diode, LED.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 4 of 8
Outcome 6
Demonstrate knowledge of transistors used in automotive circuits.
Evidence requirements
6.1
The symbols, operation, and terminal layout of transistors are described
according to manufacturer’s specifications.
Range
6.2
BJT (bipolar junction transistor), FET (field effect transistor).
The use of a BJT as a switch in an automotive circuit is described according to
manufacturer’s specifications.
Range
on and off, high and low resistance.
6.3
Common emitter amplifier function is described in terms of signal inversion and
application.
6.4
Automotive transistor testing procedures are described according to
manufacturer's specifications.
Range
6.5
manufacturer's forward and reverse junction resistance
specifications.
Transistor bias is explained according to manufacturer’s specifications.
Range
forward and reverse junction.
Outcome 7
Demonstrate knowledge of amplifier application for automotive circuits.
Evidence requirements
7.1
Amplifier couplings for an automotive circuit are described in block form.
Range
direct AC, transformer.
7.2
Darlington amplifier function and operation are described in terms of current
gain and application.
7.3
Amplifier operation in an automotive circuit is described according to
manufacturer’s specifications.
Range
description in block form;
amplifying analogue transducer signals.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 5 of 8
Outcome 8
Demonstrate knowledge of silicon controlled rectifiers (SCR's) and thyristors in
automotive circuits.
Evidence requirements
8.1
SCR and thyristor operation in an automotive circuit is described according to
manufacturer’s specifications.
Range
8.2
symbol, action in a DC ignition circuit.
SCR and thyristor ratings for automotive circuits are described according to
manufacturer’s specifications.
Range
voltage and current handling.
Outcome 9
Demonstrate knowledge of digital fundamentals for automotive circuits.
Evidence requirements
9.1
The differences between analogue and digital electronics are compared.
Range
9.2
chart differences in on-off characteristics.
Logic gate operation is described according to manufacturer’s specifications.
Range
or, and, not, truth tables.
Outcome 10
Demonstrate knowledge of display devices for automotive applications.
Evidence requirements
10.1
Display device function and operation are described according to
manufacturer’s specifications.
Range
10.2
seven digit, liquid crystal, dot matrix.
Repair requirements for display devices are identified.
Range
testing procedures, replacement of unit.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 6 of 8
Outcome 11
Demonstrate knowledge of multiplex wiring for automotive circuits.
Evidence requirements
11.1
The use of multiplexing for automotive circuits is identified.
Range
colour coding, digital buss.
Outcome 12
Demonstrate knowledge of microprocessors used in automotive circuits.
Evidence requirements
12.1
The operation of memory devices for automotive circuits are described
according to manufacturer’s specifications.
Range
12.2
Terminology associated with microprocessors is described according to
manufacturer’s specifications.
Range
12.3
description in block form;
control module, arithmetic and logical unit, registers, accumulator,
clock.
The use of microprocessors for automotive systems is described according to
manufacturer’s specifications.
Range
12.5
RAM (random access memory), ROM (read only memory), ECM
(Electronic Control Module), input/output, KAM (Keep Alive
Memory).
Parts of a microprocessor are described according to manufacturer’s
specifications.
Range
12.4
storing the programme, holding information data for inputs and
outputs.
as an Electronic Control Module (ECM), controlling a system,
signal recognition.
Sections of an ECM are described according to manufacturer’s specifications.
Range
description in block form;
microprocessor, memory section, input-output section.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 7 of 8
Outcome 13
Create series-parallel circuits using resistors, and calculate voltage and current
distribution.
Range
physically assembled from components, drawing a diagram.
Evidence requirements
13.1
Circuits are produced with three resistors and with four resistors.
13.2
The voltage across each resistor is calculated and measured.
Range
13.3
using Ohm's Law, using test instruments.
The current through each resistor is calculated and measured.
Range
using Ohm's Law, using test instruments.
Outcome 14
Calculate values of power, given any two of voltage, current, or resistance values.
Range
series circuit, parallel circuit, series-parallel circuit.
Evidence requirements
14.1
Formulas chosen are correct for the values given.
14.2
Answers are expressed using correct multiples and sub-multiples of the unit.
Range
mega, kilo, milli, micro.
Replacement information
This unit standard has been by replaced unit standard
24129, unit standard 24130, unit standard 24131, and
unit standard 24132.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017
NZQA Expiring unit standard
5464 version 5
Page 8 of 8
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
31 October 1995
31 December 2016
Review
2
29 March 1999
31 December 2016
Review
3
25 January 2008
31 December 2016
Rollover
4
19 November 2010
31 December 2016
Rollover
5
18 February 2016
31 December 2020
Consent and Moderation Requirements (CMR) reference
0014
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, or
an inter-institutional body with delegated authority for quality assurance, before they can
report credits from assessment against unit standards or deliver courses of study leading
to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Consent requirements and an outline of the moderation system that applies to this
standard are outlined in the Conesnt and Moderation Requirements (CMR). The CMR
also includes useful information about special requirements for organisations wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2017