1. Practical Assessment_Carry Out Levelling__Part_1.docx

© Canberra Institute ofTechnology RTO Code 0101 Page1 of 12 Date created:30/07/2021
cit.edu.au Date updated: 27/05/2022
Assessment Practical/Observation
Student Name CIT Number
Competency Title, Code and
Banner Code
CRN
*Carry Out Levelling Operations – CPCCOM3006
Assessment Type ☐ In the workplace ☒ Simulated environment ☐ Other
Assessment Date
Other Team Members
Student Statement: This assessment is myown work. Anyideas andcomments made byother people have been
acknowledged. I understandthat byemailing or submitting thisassessment electronically, I agree to thisstatement.
Student Signature Date
PRIVACY DISCLAIMER: CITis collecting your personalinformation for assessment purposes. Theinformation willonlybe used in
accordance withtheCITPrivacy Policy.
Assessor Feedback (also complete observation checklist and questions on last page)
 Student provided with feedback
Attempt 1 ☐ Satisfactory ☐ Not Yet Satisfactory Date / /
Attempt 2 ☐ Satisfactory ☐ Not Yet Satisfactory Date / /
Assessor Name Assessor Signature
Note to Assessor: Pleaserecordany reasonable adjustmentthat has occurred for this assessment.
Instructionsto Assessor
Work, Health and Safety: Awork health and safetycheck oftheassessmentenvironment is to beconductedprior totheassessment and
any hazards addressed appropriately.
List the assessment range and conditions, timeand materialson thenextpage
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Information for Students: You have two (2) attempts for this assessment.
 If your first attempt is not successful, your teacher will discuss your results with you and
will arrange a second attempt.
 If your second attempt is not successful, you will be required to re-enrol in this unit.
Only one re-assessment attempt will be granted for each assessment item.
Time Allowed: 8 hours
Materials provided by Assessor: All materials and tools required to complete the task will
be provided.
Materials and Equipment tobe supplied by the Student: Pencil, Pen, Personal protective
equipment PPE.
Assessment Range and Conditions: Assessment will be always conducted in simulated work
environment at CIT Bruce under teacher supervision. If at any stage the Assessor deems the
assessment to be unsafe it will be stopped. Access to all resources, manuals and standards
are permitted. All mobile phones are to be switched off.
Assessment Criteria: To achieve a Satisfactory result, your Assessor will be looking for your
ability to demonstrate the key skills/tasks/knowledge detailed in the Assessment Task to
industry standard.
The criteria that you will be assessed for this task are:
Planning and Processes Planned, organised task, and perform work following
accepted industry processes and standards.
Take responsibility for own
outputs in work and learning
Actively participated and engaged as an individual and/or
team member in all tasks and activities.
Specifications Job meets specification requirements, to industry standard
Time Management Task achieved within time and available information
requirements
Communication Written and oral communication met minimal job /task
requirements
WH&S Maintain a safe work environment and complied with WHS
regulations, supervisor instructions, and used appropriate
PPE for required tasks
Clean-Up Materials, tools and equipment are stored in line with
instruction. Area is left clean and free from hazards

Assessment Task Instructionsfor Students
You will be required to complete and submit photos of the following documents to
eLearn.
 1/ completed rise and fall booking sheet.
 1/ completed height of collimation booking sheets.
 1/ completed gradient ratio booking sheet.
You will be required to complete the following tasks:
 Read and understand all aspect of this assessment including instructions, plans,
specifications and marking requirements and standards before commencing.
Complete a JSA (Job Safety Analysis) and Toolbox talk
 Task 1: Complete a “2 Peg test” for accuracy using booking table.
 Task 2: Calculate and record the difference in heights of a traverse from a datum
point with a change point using rise and fall method.
 Task 3: Calculate and record the difference in heights of a traverse from a datum
point using height of collimation method.
 Task 4: Calculate and record distance using Stadia Lines and Staff
 Task 5: Clean-up work site, and store materials and tools appropriately.
TASK 1: Check accuracy of optical level using “2 Peg test” method
Before starting work, you will check the accuracy of your optical level. Like in the previous
subject you will measure two points, move the optical level, and measure them again,
comparing the results.
 Select a suitable test range for 2 points. It should be roughly the length of a building
site (30m-60m) and fairly flat. You can use flat ground, kerbs, or a tar sealed area.
If you are using a road, make sure a traffic control plan is in place.
 Mark 2 points on the ground with either wooden pegs or marking paint. Indicate
which point is backsight (BS) and which is foresight (FS).
 Set the optical level up according to manufacturer’s instructions about midway along
a straight line between the pegs.
 Place the staff at the BS (backsight) peg, take the reading of the staff through the
optical level and record it in the backsight column of your booking sheet.
 Repeat the process at the FS (foresight) peg and book it (Record in the booking sheet).
In the example table 1 below the BS is 1.425mm and the FS is 1.360mm.

 Subtract the BS from the FS to calculate the rise or fall. If the number is positive put it
in the rise column, if it is negative put it in the fall column
In the example subtracting the BS from the FS (1.425 - 1.360 = 0.065mm. ) will find the
difference in height.
Table 1. Example Booking sheetfor reading one
Backsight Intermediate Foresight Rise Fall Reduced
level
Remarks
READING ONE:
1.425 BS peg
1.360 0.065 FS peg
In this example the backsight is more mm than the foresight. This means the Backsight is
further away from the horizontal plane that the level uses to measure (known as the line of
collimation).
If it is further from the horizontal plane (line of collimation), the backsight is on lower ground
than the Foresight.
Because the foresight is rising uphill along the ground, the difference is recorded in the Rise
column.
 Now Move the instrument close to the BS peg (around 3 metres) on a straight line
with the FS peg.
 Take the new readings to the BS and FS pegs and correctly book the readings.
 If the optical level is calibrated properly, there will be a very slight (0-5mm), or no
difference at all between the two readings.
In the picture the angle ‘e’ is the same
for a correctly adjusted level.
You can adjust the line of sight so
that it is the same as the horizontal
plane.
The error in an unadjusted level is
known as the collimation error

Table 2. Example Booking sheet reading two
Backsight Intermediate Foresight Rise Fall Reduced
level
Remarks
READING ONE:
1.425 BS peg
1.360 0.065 FS peg
READING TWO:
1.453 BS peg
1.415 0.038 FS peg
Collimation Error = 0. 027
* Collimation error = the difference between the two readings
As you can see in table 2 the collimation error is 27mm (0.065 minus 0.038).
Sometimes the ‘Two Peg Test’ is faulty due to human error so repeat the test again if
you feel that this may be the case.
Some levels are adjustable so read the manuals instructions on how to do this where
others are not and need to be serviced.
Recordyour readings inthe booking table below.
Backsight Intermediate Foresight Rise Fall Reduced level Remarks
READING ONE:
BS PEG
FS PEG
READING TWO:
BS PEG
FS PEG
COLLMINATION ERROR =

Table for Optional Second Exercise:
Backsight Intermediate Foresight Rise Fall Reduced level Remarks
READING ONE:
BS PEG
FS PEG
READING TWO:
BS PEG
FS PEG
COLLMINATION ERROR =
TASK 2: Use optical level to transfer levels usingrise and fall method
The rise and fall method are whenyoumeasure twopointsandcalculate if the second
pointishigheror lowerthanthe first.
In thisexampleare calculatingthe heightdifference betweenthe topandbottomof a set
of stairs,butyoucan do thisforanyslope,itdoesnotneedto be a setof stairs.
Start Point
Finish Point
Change Point

 Mark your start and finish points, this is called a traverse. In the example
above the start point is the paint spot at the front edge of the top stair. The
finish point is the base of the bottom step.
 Set up your optical level to manufacturer’s instructions and accurately level it.
 Place the staff at the starting point, this will be your datum.
 Rotate the optical level using the sight guide on top of the level as a guide.
Fine tune the position with the front adjustment knobs and the focus knob on
the right side.
 Measure the height and record it in your booking table in the backsight
column (backsight 1).
 Take 1 intermediate measurement and another halfway to your finish point
the 7th step if you are using the example location.
This halfway point will be the changeover point (foresight 1). Record your
measurements in the booking table.
 Move the optical level to a lower area, making sure the level is above the
change point, and recalibrate it.
 Take another measurement from the change point (backsight 2). Take 1 more
intermediate measurement and your finish point (foresight 2). Record your
measurements.
 Use your results from the booking sheet to calculate the total difference in
millimetres between start point (backsight) and finish point (foresight).

 Check the accuracy of your records with the 3 check method.
Find the total of the foresight column minus the total of the backsight column.
This should be the same as the total of the rise and fall columns of your booking
sheet. It should also be the same as the change in RL.
TASK 3: Conduct levellingprocedures usingheight of collimation method 1
In this task you will be doing a similar exercise as task 2 but instead of calculating the
change in height one point to the next, you will calculate the difference in height from
the same point each time.
The height you are measuring from each time will be the line of sight through the
instrument, otherwise known as the height of collimation or height of instrument.
 Like last time, set out a start (Datum) and finish point approximately 15-20m
apart on sloping ground. For this example, we will be using another set of
stairs in front of G-Block. The RL of the datum is 636.440
 Start by recording the height of your instrument above the datum and put this
Finish Point
Change Point
Start Point

in the Backsight column (backsight 1).
 Take an intermediate measurement and another halfway down the traverse,
(if using the steps in the example this is landing). This is the change point
(foresight 1). Record your results in the booking table.
 Change the position on the optical level and recalibrate it.
 Take another measurement from the changeover point (backsight 2), an
intermediate point, and the finish point (foresight 2). Record these in the
booking table.
 Use your results in the booking table to calculate the change in height in mm
from the start and finish points.
Remember to deduct the height of the instrument from your measurements.
 Use the booking table to record foresights and backsights and calculate thetotal
difference in millimetres between start point and finish point.
 Check the accuracy of your records with the 3-check method.
Find the total of the foresight column minus the total of the backsight column.
This should be the same as the difference from the first and last reading in the
height of collimation column. It should also be the same as the change in RL.
TASK 4: Use optical level to calculate distance
In this task you will be using an optical level to measure distances.
To do this you will use the lines above and below the crosshair in your optical level.
These are called stadia lines.
 Set out a traverse to measure the distance and set up the optical level behind the
starting point.
Start Point
Finish Point

The example is the ramp from G-Block towards D-Block (behind the workshop).
 Place the staff at the start of your run and record the height of your upper and
lower stadia lines on your booking sheet.
 Subtract the lower stadia line reading from the upper reading and multiply that by
100. This gives you the distance of the staff from the optical level.
 Repeat this at the end of your run.
 Subtract the close point from the far point to calculate the length of your run.
 Use either the rise and fall method or the height of collimation method to find the
difference in height from the start and end of your run.
 Divide the length of your run by the total rise from one end to the other to
calculate the gradient of your run.
In the example a sign is displayed indicating the gradient of this ramp exceeds the
recommended maximum gradient of 1:20 (1.0m of rise for every 20.0m of length)
for ease of wheelchair use.
The gradient of the run in a ratio is: ____________________________
TASK 5: Clean-up work site, materials, and tools
 All tools and equipment to be cleaned, checked, and returned to stores
 All excess materials to be stowed in racks
 Work site to be cleaned and free of hazards
Lower stadia line
Upper stadia line

Carry Out Levelling - Observation Checklist Attempt 1 Attempt 2
S NYS S NYS
O1: 1. Student was able to interpret and apply relevant work instruction and complete
all documentation given.
☐ ☐ ☐ ☐
2. Student was able to read and interpret plans, site drawings and specifications. ☐ ☐ ☐ ☐
3. Student completed and agreed to followJSA and Toolbox talk. ☐ ☐ ☐ ☐
T1: Two peg test
4. Levelling tool set up in accordance with manufacturer’s instruction at mid-way
point
☐ ☐ ☐ ☐
5. Accurately recorded Backsight and foresight ☐ ☐ ☐ ☐
6. Relocated instrument and recorded new backsight and foresight ☐ ☐ ☐ ☐
7. Calculated and recorded Collimation error ☐ ☐ ☐ ☐
8. Optical level accuracy was determined ☐ ☐ ☐ ☐
T2: Rise and fall task:
9. Levelling tool set up in accordance with manufacturer’s instruction at station 1
(datum)
☐ ☐ ☐ ☐
10. Backsight, intermediate points, change points and foresight were recorded. ☐ ☐ ☐ ☐
11. Levelling tool set up in accordance with manufacturer’s instruction at station 2 ☐ ☐ ☐ ☐
12. Backsight, intermediate points, change points, and foresight were recorded ☐ ☐ ☐ ☐
13. Reduced levels for all stations are calculated and levels recorded accurately (rise
and fall method).
☐ ☐ ☐ ☐
T3: Height of collimation task:
14. Levelling tool set up in accordance with manufacturer’s instruction at station 1
(datum)
☐ ☐ ☐ ☐
15. Backsight, intermediate points, change points and foresight were recorded. ☐ ☐ ☐ ☐
16. Levelling tool set up in accordance with manufacturer’s instruction at station 2 ☐ ☐ ☐ ☐
17. Backsight, intermediate points, change points, and foresight were recorded ☐ ☐ ☐ ☐
18. Reduced levels for all stations are calculated and levels recorded accurately
(height of collimation method).
☐ ☐ ☐ ☐
T4: Calculate distance task:
19. Levelling tool set up in accordance with manufacturer’s instruction and checked
for accuracy
☐ ☐ ☐ ☐
20. Stadia lines are identified, and levels recorded ☐ ☐ ☐ ☐
21. Distance is correctly calculated. Tolerance + or –
5%
☐ ☐ ☐ ☐

T5: 22. The student was observed completing the following tasks during clean-up:
23. Materials, tools and equipment are stored in line with marking rubric and
instructions and work area is left clean and free from hazards
☐ ☐ ☐ ☐

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