18 Questions
What is the purpose of a flow chart in a maintenance process?
To guide maintenance personnel through a fault finding process
In a flow chart, what type of box represents a decision point?
A diamond
Which step should be taken if the brake running clearance is not satisfactory?
Check for damaged rotors
What do boxes in a flow chart represent?
Steps in a process
If the leak in a valve is not within limits after 12 cycles, what should be done according to the text?
Replace the valve
Which symbol is typically used to represent a processing step in a flow chart?
A rectangle
What does a flow chart typically include to signal the start and end of a process?
Symbols
In a fault isolation process, what symptom does the flow chart in the text begin with?
The lamp does not work
When tasked with rectifying faults, what is highly encouraged for technicians according to the text?
Seeking assistance from senior trade personnel, supervisors, and SMEs
What technique is mentioned in the text as useful for generating many ideas quickly to improve a process or solve a problem?
Brainstorming
What type of faults may be suitable for brainstorming when all other options are exhausted?
Difficult faults like intermittent or random faults
What is essential for everyone to do during brainstorming sessions as mentioned in the text?
Contribute ideas
What is the purpose of the half-split rule in fault localization?
To split the system into two halves for individual checks
In the fault isolation process using the half-split rule, what should be done if one half does not identify the fault?
Split the identified faulty half further
Which component should be assumed as faulty if there is no output at point 2 in the linear system shown in this figure?
Component 'B'
What should be done next if there is no output at point 1 after checking at point 2 in the linear system?
Assume component 'A' is faulty
In the half-split fault finding process, what is done after identifying a faulty half?
Further split the identified faulty half
What step is taken in the fault localization process if there is an output at point 1 after checking at point 2 in the linear system?
Assume component 'B' is faulty
Study Notes
Flow Charts
- A flow chart is a schematic representation of a process, using boxes to represent steps and their order with arrows.
- It guides maintenance personnel through a fault finding process using standard symbols.
- A simple flow chart includes symbols to signal the start and end of the process.
- The flow chart commences with the symptom of the fault and ends with an activity to repair.
Corporate Knowledge
- An organisation builds up a repository of knowledge acquired over a long period of time.
- Difficult faults are remembered, and when rectified, the process of solving the problem is rarely forgotten.
- Seeking assistance from senior trade personnel, supervisors, and Subject Matter Experts (SMEs) is highly encouraged when tasked with rectifying faults.
Brainstorming
- Brainstorming is a widely used technique for a small group to generate many ideas in a short time, often to improve a process or solve a problem.
- It is often more effective than individuals working alone in generating ideas to isolate a difficult fault.
- Brainstorming requires that everyone must contribute.
Fault Localisation
- The ‘half-split rule’ is an effective way to find faults by simplifying systems into a flow diagram or path.
- The flow can be either mechanical or electrical.
- The half-split fault finding process involves:
- Checking the complete system.
- Splitting the system into two halves.
- Checking each half individually.
- Further splitting the faulty half until the fault is isolated.
Test your knowledge on flow chart symbols and processes. This quiz covers the basic elements of flow charts, such as symbols for starting and ending a process, and includes an example starting with a fault symptom and ending with a repair activity.
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