Engineering Technician (EngTech) Application of Practical Engineering Knowledge and Skills Syllabus

Application of Practical Engineering Knowledge and Skills syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Application of Practical Engineering Knowledge and Skills in Engineering Technician (EngTech), not a summary of it.

1. 1

   Engineering Drawings and Technical Documentation

   4 topics

   • Interpreting Engineering Drawings
     • Orthographic and isometric projection conventions
     • BS 8888 dimensioning and tolerancing standards
     • Geometric Dimensioning and Tolerancing (GD&T) symbols
     • Section views, hidden detail and scales
   • Schematics and System Diagrams
     • Electrical and electronic circuit symbols
     • Hydraulic and pneumatic schematics
     • Piping and instrumentation diagrams (P&ID) basics
   • Computer-Aided Design (CAD) Awareness
     • 2D and 3D CAD model interpretation
     • Producing and amending working drawings
     • Bills of materials and parts lists
   • Technical Specifications and Datasheets
     • Reading manufacturer datasheets and component ratings
     • Method statements and work instructions
2. 2

   Manufacturing, Assembly and Installation Processes

   4 topics

   • Measurement and Marking Out
     • Use of rules, verniers, micrometers and gauges
     • Datum surfaces and reference points
     • Tolerances, limits and fits
   • Material Removal and Forming
     • Turning, milling, drilling and grinding
     • CNC machining awareness
     • Bending, forming and sheet-metal work
   • Joining and Fabrication
     • Welding, brazing and soldering processes
     • Mechanical fasteners and threaded joints
     • Adhesives and bonded assemblies
   • Assembly and Installation
     • Sequencing and fitting of components
     • Torque settings and locking devices
     • Site installation and commissioning basics
3. 3

   Maintenance, Fault-Finding and Testing

   3 topics

   • Maintenance Strategies
     • Planned preventive vs reactive maintenance
     • Condition monitoring and predictive maintenance
     • Maintenance schedules and logbooks
   • Systematic Fault Diagnosis
     • Logical fault-finding methodologies
     • Half-split and input-to-output techniques
     • Root cause analysis basics
   • Test Equipment and Calibration
     • Multimeters, oscilloscopes and pressure testers
     • Calibration and traceability to standards
     • Recording and interpreting test results
4. 4

   Applying Theory to Practical Problems

   3 topics

   • Selecting Appropriate Methods and Tools
     • Choosing techniques for the task and resources
     • Working within established procedures and limits
   • Solving Defined Engineering Problems
     • Breaking problems into manageable steps
     • Using established codes, standards and good practice
   • Continuous Improvement at Technician Level
     • Identifying inefficiencies and suggesting improvements
     • Lean and 5S workplace organisation basics

Application of Practical Engineering Knowledge and Skills flashcards for Engineering Technician (EngTech)

25 of 54 cards from the Application of Practical Engineering Knowledge and Skills deck — real questions with worked answers.

1. In engineering drawing, what is the difference between First Angle and Third Angle orthographic projection?

   Both show multiple 2D views of an object. In First Angle (common in UK/Europe), the view is projected through the object onto a plane behind it, so the right-side view is placed on the left. In Third Angle (common in USA), the view is projected onto a plane in front, so the right-side view is placed on the right. The convention is shown by a truncated-cone symbol on the drawing.

2. What do the symbols $\phi$ and $R$ denote on an engineering drawing?

   $\phi$ (or a circle with a slash) denotes a diameter, e.g. $\phi 20$ means a 20 mm diameter. $R$ denotes a radius, e.g. $R5$ means a 5 mm radius. Diameter is used for full circles/holes; radius for arcs and fillets.

3. On a dimensioned drawing, what is the meaning of a bilateral tolerance written as $50^{+0.1}_{-0.2}$?

   The nominal size is 50 mm, but the feature is acceptable anywhere between an upper limit of $50.1$ mm and a lower limit of $49.8$ mm. The total tolerance band is $0.1 - (-0.2) = 0.3$ mm.

4. List the standard line types used in engineering drawings and their meanings.

   Continuous thick line = visible edges/outlines; continuous thin line = dimension, leader, projection and hatching lines; thin dashed line = hidden detail; thin chain (long-short dash) = centre lines and lines of symmetry; thick chain = surfaces requiring special treatment; continuous thin wavy/zig-zag line = break lines.

5. What is a sectional view on an engineering drawing and how is the cut material indicated?

   A sectional view shows the internal features of a component as if it were cut through along a cutting plane. The solid material that the cutting plane passes through is shown with hatching (thin parallel lines, usually at 45°). The cutting plane is marked on another view by a thick chain line with arrows showing the viewing direction.

6. What is the purpose of a title block on an engineering drawing, and name four pieces of information it typically contains.

   The title block provides identifying and control information for the drawing. It typically contains: drawing/part number, title or description, scale, projection symbol, drawn-by/checked-by names and dates, material, units, tolerances, revision number, and sheet number.

7. In a schematic/circuit diagram, what is the difference between a schematic diagram and a wiring (connection) diagram?

   A schematic diagram shows the function and logical relationship of components using standard symbols, ignoring physical layout. A wiring (connection) diagram shows the actual physical arrangement and routing of wires/terminals to enable installation and fault-finding. Schematics aid understanding of operation; wiring diagrams aid construction and maintenance.

8. On a circuit schematic, what do crossing lines with a dot versus crossing lines without a dot indicate?

   A dot at the intersection indicates an electrical connection (a junction/node). Lines crossing without a dot indicate no connection — the conductors simply pass over each other. Some standards use a 'hop' (small semicircle) to show no connection.

9. In a pneumatic/hydraulic system diagram, what does a square (envelope) with arrows represent, and what do the number of squares indicate?

   A square (envelope) represents a valve position/state, with internal arrows or lines showing the flow path in that position. The number of squares equals the number of switching positions of the valve, and the number of ports is given by the connections — e.g. a 5/2 valve has 5 ports and 2 positions.

10. What is a P&ID and what type of system diagram is it?

    A Piping and Instrumentation Diagram. It is a schematic that shows the piping, equipment (pumps, vessels, valves) and the instrumentation/control loops of a process plant using standardised symbols and tag numbers. It is used for design, operation, and maintenance of process systems rather than physical scale layout.

11. What is the difference between a block diagram and a circuit schematic?

    A block diagram represents a system at a high level, showing functional sub-systems as labelled blocks connected by signal/flow lines, without internal detail. A circuit schematic shows the detailed components and their interconnections using standard symbols. Block diagrams give an overview; schematics give the detail needed to build or repair.

12. In CAD, what is the difference between a 2D drawing, a surface model, and a solid model?

    A 2D drawing represents geometry in two dimensions (lines, arcs) like a traditional drawing. A surface model defines the outer skin/surfaces of an object with no material 'inside' (hollow). A solid model defines a complete volume with mass properties, so volume, mass, and centre of gravity can be calculated and it can be used for FEA and CAM.

13. What does 'parametric' mean in the context of parametric CAD modelling?

    Parametric modelling means geometry is driven by parameters (dimensions, constraints, relationships). Changing a parameter automatically updates the model and any associated drawings/assemblies. This allows design intent to be captured and rapid design changes, because features are linked by rules rather than fixed coordinates.

14. In CAD/CAM workflows, what does the abbreviation CAE stand for and how does it relate to CAD and CAM?

    CAE = Computer-Aided Engineering. CAD creates the geometry/design, CAE analyses and simulates it (e.g. FEA for stress, CFD for fluid flow), and CAM uses the CAD model to generate machine instructions (toolpaths/G-code) for manufacture. Together they form an integrated digital design-to-manufacture chain.

15. What is the purpose of constraints (geometric and dimensional) in a CAD sketch?

    Constraints control the size, shape, and relationships of sketch entities so the geometry behaves predictably. Geometric constraints fix relationships (parallel, perpendicular, tangent, coincident, concentric); dimensional constraints fix actual sizes (length, radius, angle). A sketch is 'fully defined/constrained' when no entity can move unexpectedly.

16. What is a datasheet in engineering, and name three categories of information it typically provides for a component.

    A datasheet is a manufacturer's document giving the specifications and operating characteristics of a component or material. It typically provides: electrical/mechanical ratings (e.g. voltage, current, load), absolute maximum ratings/limits, physical dimensions and pin-outs, operating conditions (temperature range), tolerances, and performance graphs.

17. On a component datasheet, what is the difference between an 'absolute maximum rating' and a 'recommended operating condition'?

    Absolute maximum ratings are the limits beyond which the component may be permanently damaged; they must never be exceeded even momentarily. Recommended operating conditions are the range within which the component is designed to function reliably and meet its specified performance. Operating between these ranges may work but with reduced reliability or out-of-spec performance.

18. What is a tolerance class/grade in a technical specification, and why is it important to select the correct one?

    A tolerance class (e.g. ISO IT grades, or general tolerances to ISO 2768) defines the permitted variation on a dimension. Selecting the correct grade balances function against cost: tighter tolerances improve fit and interchangeability but increase manufacturing cost and time. Over-specifying tolerance wastes money; under-specifying risks parts not fitting or functioning.

19. Define accuracy, precision, and resolution as applied to measurement.

    Accuracy = how close a measured value is to the true value. Precision (repeatability) = how consistent repeated measurements are with each other. Resolution = the smallest increment the instrument can display or detect. An instrument can be precise but inaccurate (consistent but offset), or accurate on average but imprecise (scattered).

20. How do you read a metric vernier caliper with a main scale in mm and a vernier scale of 50 divisions?

    Read the main scale value just before the vernier zero (in mm). Then find the vernier line that exactly aligns with a main-scale line; multiply its number by the resolution. For a 50-division vernier the resolution is $\frac{1}{50} = 0.02$ mm, so an aligned 12th line adds $12 \times 0.02 = 0.24$ mm. Total = main scale + vernier reading.

21. On a metric micrometer, what is the standard pitch of the spindle thread and the resolution of the thimble (with 50 divisions)?

    The standard spindle thread pitch is $0.5$ mm, so one full turn of the thimble advances the spindle $0.5$ mm. With 50 divisions on the thimble, the resolution is $\frac{0.5}{50} = 0.01$ mm. Reading = sleeve (main) reading + thimble division reading.

22. What is 'marking out' in workshop practice, and name three common marking-out tools.

    Marking out is transferring dimensions and reference lines from a drawing onto the workpiece/material before cutting or machining. Common tools include: scriber (scribes lines), engineer's square (right angles), odd-leg/Jenny calipers, dividers (arcs/circles), centre punch (locating drill points), surface gauge/height gauge, and engineer's blue (marking dye).

23. Why is a centre (dot) punch used before drilling a hole?

    A centre punch creates a small conical indentation at the marked centre. This indentation locates the drill point and stops the drill bit from 'wandering' or skating across the surface when starting the hole, ensuring the hole is drilled accurately on the marked-out position.

24. What is a datum (reference) when marking out or dimensioning, and why is using a single datum preferred?

    A datum is a reference edge, surface, line, or point from which dimensions and measurements are taken. Using a single datum (datum dimensioning) is preferred because it prevents the accumulation of tolerance errors (tolerance stack-up) that occurs when each dimension is measured from the previous feature (chain dimensioning).

25. Classify material removal processes by giving two examples each of cutting, abrasive, and non-traditional methods.

    Cutting (chip-forming): turning, milling, drilling, sawing. Abrasive: grinding, honing, lapping, sand/grit blasting. Non-traditional (no mechanical chip): EDM (electrical discharge machining), laser cutting, water-jet cutting, chemical/electro-chemical machining. Cutting and abrasive remove material mechanically; non-traditional use thermal, electrical, or chemical energy.

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