GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
SECTIONS Marks Learner’s Mark
A. Investigate - Design Brief and 15
specifications
- Investigate Cranes
B. Design - Oblique Drawing 20
- Circuit Diagram
C. MAKE - Learners build the model in 35
their respective groups
TOTAL 70
1.1. Write a design brief for the above-mentioned scenario (2)
I am going to design and make a crane with an electromagnet for a scrapyard dealer to sort non-magnetic and
magnetic materials for recycling. √√
2. Specifications and Constraints
2.1. List 2 specifications of a crane. (2)
• It must be a simple frame structure.
• It must be strong and stiff.
• It must be reinforced through triangulation.
• Uses a winch, a cable, and pulleys to lift and lower the arm. (Any 2 correct answers) √√
2.2. List 2 specifications of an electromagnet (2)
• It must be strong enough to pick up several steel paperclips.
• It must have switch so that it can be switches on and off.
• It must have light that indicates when it is switched on.
• Electromagnet must be attached to the cranes arm. (Any 2 correct answers) √√
1
GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
2.3. List 2 limitations / constraint for designing and building a crane with an electromagnet. (2)
• Time constraints
• Resources
• Knowledge and skills (any 2 correct answers) √√
3. Investigate
Look at the four figures of cranes below to answer the following question. Each crane has a winch and
one or more pulleys.
3.1. Look at where the winches are placed. Mark each winch with the letter W on the pictures. (4)
3.2. Look at where the pulleys are placed. Mark each with the letter P on the pictures. (6)
3.3. Which of the cranes have pulley systems with two or more pulleys? (2)
Figure A√ and Figure B√
3.4. Which of the four pictures of cranes listed below would you recommend solving the problem that is
posed in the scenario and give a reason for your answer? (3)
Figure C.√
• It has an electromagnet attached to it. √
• It has a switch that turns it on and off. √
2
GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
3.4. Copy figure B and C onto the spaces provided below. Do not trace them. Make a freehand sketch. (4)
The drawing is a free hand sketch. √√
The drawing is complete and neat. √√
SECTION A TOTAL MARKS: 15
SECTION B: DESIGN
SECTION B: DESIGN [20 MARKS]
4. Oblique drawing (10)
Complete the oblique drawing of a crane below. Use a pencil and ruler.
Oblique drawing Not correct or not Satisfactory Excellent
completed effort effort
The top part is completed. 0 1 2
The back part is completed. 0 1 2
The load is completed. 0 1 2
3
GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
The crane is properly drawn in 3D. 0 1 2
Neatness 0 1 2
TOTAL /10
7. Circuit diagram (10)
Draw a circuit diagram for the electromagnet using your pencil and ruler. Your circuit diagram must
include the following:
• a cell
• an open switch
• a bulb (to show when it is on)
• an electromagnet
Circuit diagram Wrong One to three Four correct
symbols correct symbols symbols
All components drawn using correct symbols 0 1-3 4
All symbols connected in series 0 1-3 4
The drawing is neat and tidy 0 1 2
Total
SECTION B TOTAL MARKS: 20
4
GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
SECTION C: MAKE [35 MARKS] MAKE A WORKING MO
COMMUNICATE
GROUP WORK
1. You have two hours to make the structure/crane.
2. The model should be to scale, neat and show intelligent use of available materials.
3. Each member must play a part in the making process.
4. Collect the tools and materials that you will be using. Find alternative materials if the
materials you originally required are not available.
5. Make sure that you work neatly and safely.
Level Criteria Marks
1 ➢ Learners could not complete the device / prototype / model.
➢ Little to no consideration for specifications and constraints.
➢ Learners and group needed a lot of help and motivation.
➢ The device / prototype / model does not work at all, and the components were not 1-7
connected.
➢ The device / prototype / model was not made to scale.
➢ Safe working practices were not followed while learners attempt to make the device /
prototype / working model.
2 ➢ Learners were able to complete the device / prototype / model.
➢ Some specifications and constraints were adhered to.
➢ All learners in the group attempted to put in effort to complete the model. 8 - 17
➢ The device / prototype / model was partially made to scale.
➢ Evidence of some safe working practices were illustrated while learners attempted to
make the device / prototype / working model.
➢ Model appears acceptable and the components, buzzer/ LED are functioning.
3 ➢ Learners were able to build a functional device / prototype / model.
➢ All specifications and constraints were adhered to.
➢ The model was neat, the components, buzzer / LED are functioning. 18 - 27
➢ All learners in the group attempted to put in effort to complete the model.
➢ Evidence of good safe working practices were illustrated while learners attempted to
make the device / prototype / working model.
4 ➢ Learners were able to build a functional and creative device / prototype / model.
➢ All specifications and constraints were adhered to.
➢ The model was accurately built to scale, the components, buzzer / LED are
functioning. 28 - 35
➢ All learners in the group contributed the necessary effort to complete the model.
➢ Evidence of excellent safety and working practices were illustrated while learners
attempted to make the device / prototype / working model.
5
GRADE 7 TECHNOLOGY - MEMORANDUM TERM 3 YEAR: 2023
GROUP WORK CLASSWORK
Present your solution to the class in a 5-minute presentation.
Your team must:
1. Describe the design process you followed to arrive at a solution.
2. Each team member must present an aspect of the project.
3. Decide prior to the presentation which aspect each member will present.
4. Your team must compile the following information and present it to the rest of the
class:
➢ Conclude the presentation with a display of the device and a demonstration of your crane,
GRAND TOTAL: 70
