17972 Demonstrate knowledge of heavy rigid vehicle dynamics and by S60I03

VIEWS: 8 PAGES: 4

									NZQA registered unit standard                                                      17972 version 3
                                                                                       Page 1 of 4


Title              Demonstrate knowledge of heavy rigid vehicle dynamics and
                   handling for safe driving

Level              3                             Credits           3


Purpose                        People credited with this unit standard are able to: describe
                               heavy rigid vehicle dynamics; describe heavy rigid vehicle
                               stability and handling characteristics; explain the effects of
                               loads on heavy rigid vehicle dynamics and handling, and
                               describe techniques to manage these effects; and describe
                               safe practices for driving heavy rigid vehicles.


Classification                 Commercial Road Transport > Commercial Road Transport
                               Skills


Available grade                Achieved


Explanatory notes

1       Legal requirements relevant to this unit standard include:
        Land Transport Act 1998;
        Land Transport (Road User) Rule 2004;
        Land Transport Rule: Vehicle Dimensions and Mass 2002;
        Land Transport Rule: Heavy Vehicle Brakes 2006;
        Land Transport Rule: Heavy Vehicles 2004.

2       Any new, amended or replacement Acts, regulations, Rules, standards, codes of
        practice, or NZ Transport Agency requirements or conditions affecting this unit
        standard will take precedence for assessment purposes, pending review of this unit
        standard.

3       Definitions
        ABS means anti-lock braking system;
        EBS means electronic braking system;
        handling characteristics are how a vehicle behaves as a result of its design and the
        dynamics present at the time;
        heavy rigid vehicle dynamics means the motion of the vehicle, and the interaction of
        the various physical forces that affect that motion;
        industry best practice means an industry accepted method of achieving a high
        standard outcome that meets industry needs and represents value for money;
        load sensing is a means (mechanical, electronic and/or pneumatic) of proportioning
        air pressure to heavy vehicle braking systems to reflect load mass over individual
        axles or axle groups;
        the system of vehicle control means placing the vehicle in the correct place on the
        road, at the right speed and in the right gear in all driving situations but particularly
        when approaching and negotiating hazards.
NZ Motor Industry Training Organisation                     New Zealand Qualifications Authority 2012
(Incorporated) (NZMITO)
SSB Code 101778
NZQA registered unit standard                                                    17972 version 3
                                                                                     Page 2 of 4


4     References
      Professional Skills for Driving Trucks, Wellington, NZ Motor Industry Training
      Organisation (Incorporated) (NZMITO), 2009. Available from NZ Motor Industry
      Training Organisation (Incorporated) (NZMITO) and public libraries.

Outcomes and evidence requirements
Outcome 1

Describe heavy rigid vehicle dynamics.

Evidence requirements

1.1         The effects of speed on vehicle stability are explained.

            Range          when travelling in a straight line, cornering, and negotiating
                           intersections.

1.2         The effects of vehicle mass and inertia are described in terms of acceleration,
            deceleration, and braking.

1.3         Momentum and kinetic energy are explained in terms of the relationship
            between vehicle mass and speed.

1.4         Heavy rigid vehicles and light motor vehicles are compared in terms of kinetic
            energy and its effects.

            Range          includes effects of kinetic energy on braking, cornering, and the
                           consequences of an impact.

1.5         The effects of gravity and the location of a vehicle’s centre of gravity are
            explained in terms of performance and handling.

1.6         Friction is explained in terms of how it assists vehicle control.

            Range          includes at least two friction examples.

1.7         The concept of centrifugal force is explained in terms of the interaction between
            vehicle mass, speed, friction, and centre of gravity.

Outcome 2

Describe heavy rigid vehicle stability and handling characteristics.

Evidence requirements

2.1         The effects on driving and manoeuvring of vehicle wheelbase and rear
            overhang are described.



NZ Motor Industry Training Organisation                   New Zealand Qualifications Authority 2012
(Incorporated) (NZMITO)
SSB Code 101778
NZQA registered unit standard                                                    17972 version 3
                                                                                     Page 3 of 4

2.2         The influences of road camber, road surface, and lateral wind are described in
            terms of vehicle handling and driver responses.

2.3         Loss of control situations are described in terms of potential causes.

            Range          over-steer, under-steer, roll-over.

Outcome 3

Explain the effects of loads on heavy rigid vehicle dynamics and handling, and describe
techniques to manage these effects.

Evidence requirements

3.1         The effects of load placement and the location of the centre of gravity are
            described in terms of vehicle dynamics and handling.

            Range          includes but not limited to - effects of varying the location of the
                           centre of gravity within the length, width, and height of the vehicle.

3.2         Techniques used to minimise the height of the centre of gravity are described in
            accordance with industry best practice.

3.3         The effects and management of unrestrained or live loads are described in
            terms of vehicle stability.

3.4         Load restraint measures to minimise the influence of load shift on vehicle
            stability and handling are described in accordance with industry best practice.

Outcome 4

Describe safe practices for driving heavy rigid vehicles.

Evidence requirements

4.1         Techniques for reducing the likelihood of loss of control situations are described
            in terms of their application and effectiveness.

            Range          The 4-second rule, 12-second rule (including the use of mirrors),
                           vehicle inspections (including on-road checks), and the system of
                           vehicle control.

4.2         Safe cornering techniques, including observance of recommended cornering
            speeds, are described in terms how they can reduce the likelihood of a roll-over.

4.3         Techniques for descending steep grades are described in terms of how they
            can reduce the likelihood of a runaway vehicle.

4.4         Heavy vehicle technology is described in terms of operation, limitations, and its
            influence on vehicle stability and safe handling.


NZ Motor Industry Training Organisation                   New Zealand Qualifications Authority 2012
(Incorporated) (NZMITO)
SSB Code 101778
NZQA registered unit standard                                                   17972 version 3
                                                                                    Page 4 of 4

            Range          ABS, EBS, traction control, load sensing, auxiliary braking
                           systems.



Planned review date                31 December 2015


Status information and last date for assessment for superseded versions
Process          Version Date                           Last Date for Assessment
Registration         1             12 February 2001              N/A
Review               2             22 March 2005                 N/A
Review               3             22 October 2010               N/A
Republished          3             31 August 2012                N/A

Accreditation and Moderation Action Plan (AMAP) reference         0092
This AMAP 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 Accreditation and Moderation Action Plan (AMAP). The
AMAP 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.

Comments on this unit standard

Please contact NZ Motor Industry Training Organisation (Incorporated) (NZMITO)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.




NZ Motor Industry Training Organisation                  New Zealand Qualifications Authority 2012
(Incorporated) (NZMITO)
SSB Code 101778

								
To top