Use basic fluids in engineering


This unit describes the performance outcomes, skills and knowledge required to solve problems relating to fluids involving hydrostatics, conservation of energy and conservation of momentum.

The unit of competency is applied by technicians in a structural and civil engineering environment to apply fluid principles to construction projects.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.


Elements describe the essential outcomes.


Performance criteria describe the performance needed to demonstrate achievement of the element.

1.    Relate fundamental properties to fluid characteristics.

1.1.      Define fundamental properties of a fluid.

1.2.      Compare at least 3 types of fluid according to their properties.

2.    Solve manometer problems

2.1.      Calculate fluid pressure using the appropriate formula.

2.2.      Explain the principle of the hydraulic jack.

2.3.      Calculate the load that can be lifted by a hydraulic jack.

2.4.      Solve U tube manometer problems.

2.5.      Compare advantages and disadvantages of various pressure measuring devices.

3.    Apply the energy approach to solving flow measurement problems

3.1.      Classify and explain typical types of fluid motion.

3.2.      Utilise the continuity equation to solve fluid mechanics problems.

3.3.      Use Bernoulli’s equation to solve fluid flow problems.

3.4.      Use Bernoulli’s equation to determine the theoretical discharge through a flow measuring device.

4.    Solve problems involving impact of jets

4.1.      Outline Newton’s second law.

4.2.      Use the momentum equation to calculate the forces on flat plates of various inclinations and relative velocities.

4.3.       Determine the forces on vertical and horizontal bends in a pipeline.


Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.


41974 Use basic fluids in engineering is equivalent.



Assessment requirements for DCSBFE613 Use basic fluids in engineering


To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria, foundation skills and range of conditions included in the unit.

The person must also:

  • Carry out computations using fluid principles
  • Solve engineering problems using fluid principles
  • Prepare relevant documentation

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once for each criterion.


To achieve competency in this unit, a person must demonstrate knowledge of:

  • basic properties of fluid
  • Bernoulli Equation for ideal fluids
  • conservation of mass leading to the Continuity Equation for fluid flow
  • manometer calculations


Assessment conditions:

All assessment must be completed in accordance with work health and safety standards.

When assessments are conducted remotely, invigilation software must be used to ensure authenticity of work completed.

Model answers or marking guides must be provided for all assessments to ensure reliability of assessment judgements when marking is undertaken by different assessors.

The candidate must have access to all tools, equipment, materials and documentation required.

Assessor Requirements:

Assessors must satisfy the assessor requirements in the standards for registered training organisation (RTOs) current at the time of assessment.

Assessors must also hold a tertiary qualification in engineering or related field.

Assessors must have worked for at least 3 years in industry where they have applied the skills and knowledge covered in this unit of competency.

The RTO must also ensure that trainers and assessors keep their industry knowledge up to date through ongoing professional development.

The RTO must take appropriate steps, as an ongoing procedure, to verify information about trainer and assessor’s qualifications, vocational competencies and current industry skills


Software/Hardware Used


  • N/A


  •  N/A