4.1 Measuring and Marking Out Tools

• Importance of measuring and marking out tools when performing tasks
• Measuring tools versus marking-out tools
• Measuring tools: tape measure and steel rule
• Measuring tools: callipers
• Measuring tools: weighing balance
• Measuring tools: stopwatch
• Measuring tools: ammeter and voltmeter
• Marking-out tools: divider and try-square
• Marking-out tools: marking gauge
• Marking-out tools: scriber and dot punch
• Marking-out tools: pencil and marking knife
• Selecting measuring and marking-out tools for a given task
• Using measuring and marking-out tools to perform a given task
• Caring for measuring and marking-out tools to minimise damage

• identify measuring and marking out tools used to perform tasks
• select measuring and marking out tools for a given task
• use measuring and marking out tools to perform a given task
• care for measuring and marking out tools to minimise damage
• recognise the importance of measuring and marking out tools when performing tasks

“Why are measuring and marking out tools important in day-to-day life?”

“How are measuring and marking out tools used when performing tasks?”

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1. Why measuring and marking out matter
   40 min · 1 practice tasks · quiz
   Recognise why a Kenyan workshop measures and marks before cutting, so parts fit, waste falls and a deal stays fair.
2. Measuring tools and marking-out tools
   40 min · 1 practice tasks · quiz
   Identify the two families in the Grade 7 kit: tools that read a quantity and tools that put a line or point on the work.
3. The tape measure
   40 min · 1 practice tasks · quiz
   Identify a tape measure, use it for long lengths in metres, and rewind it so the blade is not damaged.
4. The steel rule
   40 min · 1 practice tasks · quiz
   Use a steel rule for short accurate millimetre lengths on the bench, reading from zero and not using the rule as a lever.
5. Callipers
   40 min · 1 practice tasks · quiz
   Use outside and inside callipers to copy a thickness or a hole, then read the span on a steel rule.
6. The weighing balance
   40 min · 1 practice tasks · quiz
   Identify beam, spring and electronic balances, zero them, and use grams or kilograms for workshop and canteen mass.
7. The stopwatch
   40 min · 1 practice tasks · quiz
   Use a stopwatch to time a process in seconds, with agreed start and stop, including a phone in stopwatch mode if allowed.
8. The ammeter
   40 min · 1 practice tasks · quiz
   Identify an ammeter as the tool for current in amperes, connected in series on a teacher-led low-voltage circuit.
9. The voltmeter
   40 min · 1 practice tasks · quiz
   Identify a voltmeter as the tool for voltage in volts, connected in parallel on a teacher-led circuit, and contrast it with the ammeter.
10. Selecting measuring tools for a task
    40 min · 1 practice tasks · quiz
    Choose a measuring tool from the quantity the task needs: length, thickness, mass, time, current or voltage.
11. The divider
    40 min · 1 practice tasks · quiz
    Identify a divider, set it from a steel rule, and use it to step off equal spaces or scribe an arc on metal.
12. The try-square
    40 min · 1 practice tasks · quiz
    Use a try-square to mark and check a 90-degree line, with the stock against a true edge.
13. The marking gauge
    40 min · 1 practice tasks · quiz
    Set a marking gauge from a steel rule and run a line parallel to a true edge on wood.
14. The scriber
    40 min · 1 practice tasks · quiz
    Use a scriber with a steel rule or try-square to scratch a fine cut-line on metal, and cap the point after use.
15. The dot punch
    40 min · 1 practice tasks · quiz
    Use a dot punch, held square and tapped lightly, to make a pit for a drill start or a divider pivot, with eye protection.
16. Pencil and marking knife
    40 min · 1 practice tasks · quiz
    Choose a sharp pencil for first layout on wood, card and paper, and a marking knife for a precise wood line the saw can follow.
17. Using tools to mark out a task
    40 min · 1 practice tasks · quiz
    Select and use measuring and marking-out tools to lay out a 200 mm by 100 mm name plate, then check before any cut.
18. Caring for measuring and marking-out tools
    40 min · 1 practice tasks · quiz
    Care for the Grade 7 kit so tools stay true and people stay safe: clean, store, refuse misuse, and report damage.