
Unit 2: 
Engineering Science 


Unit code:

L/601/1404



QCF level:

4



Credit value:

15






• Aim
This unit aims to provide learners with an understanding of the
mechanical and electrical principles that underpin mechanical and electrically
focused engineering systems.
• Unit abstract
Engineers, no matter from what discipline, need to acquire a fundamental
understanding of the mechanical and electrical principles that underpin the
design and operation of a large range of engineering equipment and systems.
This unit will develop learners’ understanding of the key mechanical and
electrical concepts that relate to all aspects of engineering.
In particular, learners will study elements of engineering statics
including the analysis of beams, columns and shafts. They will then be
introduced to elements of engineering dynamics, including the behavioural
analysis of mechanical systems subject to uniform acceleration, the effects of
energy transfer in systems and to natural and forced oscillatory motion.
The electrical system principles in learning outcome 3 begin by
refreshing learners’ understanding of resistors connected in series/parallel
and then developing the use of Ohm’s law and Kirchhoff’s law to solve problems
involving at least two power sources. Circuit theorems are also considered for
resistive networks only together with a study of the characteristics of growth
and decay of current/voltage in series CR and LR circuits.
The final learning outcome develops learners’ understanding of the
characteristics of various AC circuits and finishes by considering an important
application – the transformer.
• Learning outcomes
On successful completion of this unit a
learner will:
1
Be able to
determine the behavioural characteristics of elements of static engineering
systems
2
Be able to
determine the behavioural characteristics of elements of dynamic engineering
systems
3 Be able to apply DC theory to solve
electrical and electronic engineering problems
4
Be able to
apply single phase AC theory to solve electrical and electronic engineering
problems.
Unit content
1
Be able
to determine the behavioural characteristics of elements of static engineering
systems
Simply
supported beams:
determination of shear force; bending moment and stress due to bending;
radius of curvature in simply supported beams subjected to concentrated and
uniformly distributed loads; eccentric loading of columns; stress distribution;
middle third rule
Beams and
columns: elastic section
modulus for beams; standard section tables for rolled steel beams;
selection of standard sections eg slenderness ratio for compression members,
standard section and allowable stress tables for rolled steel columns,
selection of standard sections
Torsion in
circular shafts: theory of
torsion and its assumptions eg determination of shear stress, shear
strain, shear modulus; distribution of shear stress and angle of twist in solid
and hollow circular section shafts
2
Be able
to determine the behavioural characteristics of elements of dynamic engineering
systems
Uniform acceleration: linear and angular acceleration; Newton’s laws of
motion; mass moment of inertia and radius of gyration of rotating
components; combined linear and angular motion; effects of friction
Energy transfer: gravitational potential energy; linear and angular kinetic energy;
strain energy; principle of conservation of energy; workenergy transfer
in systems with combine linear and angular motion; effects of impact loading
Oscillating mechanical systems: simple harmonic motion; linear and
transverse systems; qualitative description of the effects of forcing
and damping
3 Be able to apply DC theory to solve
electrical and electronic engineering problems
DC electrical principles: refresh idea of resistors in series and
parallel; use of Ohm’s and Kirchhoff’s laws; voltage and current
dividers; review of motor and generator principles eg series, shunt; circuit
theorems eg superposition, Thevenin, Norton and maximum power transfer for
resistive circuits only; fundamental relationships eg resistance, inductance,
capacitance, series CR circuit, time constant, charge and discharge curves of
capacitors, LR circuits
4
Be able
to apply single phase AC theory to solve electrical and electronic engineering
problems
AC
electrical principles: features
of AC sinusoidal wave form for voltages and currents; explanation of how
other more complex wave forms are produced from sinusoidal wave forms; R, L, C
circuits eg reactance of R, L and C components, equivalent impedance and
admittance for RL and RC circuits; high or low pass filters; power factor;
true and apparent power; resonance for circuits containing a coil and capacitor
connected either in series or parallel; resonant frequency; Qfactor of
resonant circuit; transformer fundamentals: construction eg double wound;
transformation ratio; equivalent circuit; unloaded transformer; resistance
(impedance) matching; transformer losses; applications eg current transformers,
voltage transformers
Learning outcomes and assessment criteria

Learning outcomes

Assessment criteria for pass




On successful completion of

The learner can:




this unit a learner will:












LO1 Be able to determine the


1.1

determine distribution of shear force,
bending moment



behavioural
characteristics



and stress due to bending in simply
supported beams



of
elements of static


1.2

select standard rolled steel sections for
beams and



engineering
systems







columns to satisfy given specifications












1.3

determine the distribution of shear stress
and the






angular deflection due to torsion in
circular shafts









LO2 Be able to determine the


2.1

determine the behaviour of dynamic
mechanical



behavioural
characteristics



systems in which uniform acceleration is
present



of
elements of dynamic


2.2

determine the effects of energy transfer in
mechanical



engineering
systems







systems












2.3

determine the behaviour of oscillating
mechanical






systems









LO3 Be able to apply DC theory to


3.1

solve problems using Kirchhoff’s laws to
calculate



solve
electrical and



currents and voltages in circuits



electronic
engineering


3.2

solve problems using circuit theorems to
calculate



problems







currents and voltages in circuits












3.3

solve problems involving current
growth/decay in an LR






circuit and voltage growth/decay in a CR
circuit









LO4 Be able to apply single phase


4.1

recognise a variety of complex waveforms
and explain



AC theory
to solve electrical



how they are produced from sinusoidal
waveforms



and
electronic engineering


4.2

apply AC theory to solve
problems on R, L, C circuits and



problems







components












4.3

apply AC theory to solve problems involving






transformers.








Links
This unit may be linked with Unit 1: Analytical Methods for Engineers.
Successful
completion of this unit would enable learners to meet, in part, the
Incorporated Engineer (IEng) requirements laid down in the UK Engineering
Council Standard for Professional Engineering Competence (UKSPEC) Competence
A2, ‘Use appropriate scientific, technical or engineering principles’.
Essential requirements
Learners will need access to suitable mechanical and electrical
laboratory equipment.
Employer engagement and vocational contexts
Liaison with
employers would prove of benefit to centres, especially if they are able to
offer help with the provision of suitable mechanical or electrical
systems/equipment that demonstrate applications of the principles.
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