Individuals must be able to demonstrate knowledge of:
classifications of engines, including:
internal and external combustion
rotary and reciprocating engines
spark ignition and compression ignition engines
engine cylinder arrangements
engine configurations, including:
inline engines, V type engines and slant cylinder engines
opposed cylinder engines
camshaft and valve locations, including:
overhead cam (OHC)
overhead valve (OHV)
engine operating principles, including:
combustion, including:
air to fuel ratios and flame propagation
direct and indirect fuel injection
detonation and pre-ignition
two-stroke and four-stroke cycles
procedures for measuring engines and engine performance, including:
bore and stroke, including:
over square, square and under square engines
crank throw
swept volume and engine volume
compression ratio
engine efficiency, including volumetric efficiency, thermal efficiency and mechanical efficiency
torque and horsepower, including brake horsepower
construction and operation of petrol engines, including:
basic metallurgy relating to engines
identification of metric and imperial threads
engine components, including cylinder blocks, cylinders, pistons, cylinder heads, combustion chambers, inlet and exhaust manifolds, connecting rods, crankshafts, piston rings, gudgeon pins, camshafts, cams and flywheels
combustion chambers, including:
L head, bathtub, wedge, trapezoidal, hemispherical and heron-type shapes
multiple valve designs
construction and operation of diesel engines, including:
direct and indirect injection
swirl chambers
pre-combustion chambers
engine diagnosis, including:
wet and dry compression tests
cylinder leakage tests
cylinder power balance tests
vacuum tests
oil pressure tests
sources of fluid leaks
exhaust smoke diagnosis
engine noise diagnosis, including procedures for identifying:
common engine noises
common abnormal combustion noises
procedures for expanding knowledge, including location and content of:
technical literature relating to engine science
technical information relating to new and emerging engine technologies.
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the engine science they have applied to engines that they have worked on, e.g. repair orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
automotive repair workplace or simulated workplace
workplace instructions
three different multi-cylinder engines
technical literature relating to engine science.