Electrical Tech

ELECTRICAL TECHNOLOGY SCENARIOS

GRADE 10

1.Mr Venter owns a watch repair shop situated in an area where the crime rate rife.
After numerous break-ins, Mr Venter who is also hard of hearing and employs casual labour, approaches you to help him with a device which will indicate that someone is entering his showroom while he is in the workshop which is situated at the back.

2.A newly wed couple have bought a house and need an alarm installed. They have pets that are indoors and only want the alarm to be activated when a burglary takes place. Design and build a circuit for the owners.

3.Design and build an instrument to test the polarity and effectiveness of protective devices used in new installations.

GRADE 11

1.Security: We require a security lock for the secretary’s office gate, a learner must design and install a lock.

2.Security gate: We require a security gate to be electrically connected to three different operating points to open and close the gate. Learners must design and draw a circuit showing how the switches are connected, they must also draw a circuit showing the limit switches which control the gate when fully open and fully closed.

3.Stop guide for a motor vehicle in the garage. A learner must draw and design limit switches, relays, countdown timer and a warning light to prevent a person parking a car in the garage from going too far and crash into the wall.

GRADE 12

1.Mrs Khumalo was hi-jacked as she was opening the gate into her garage. She was hi-jacked at 20H00, under the darkness of the evening.

2.Government has offered you a tender for the provision of cleaning energy supply for the rural areas. Put up a system to address this challenge for the rural people.

3.There is a problem of indiscipline in the schools e.g dagga smoking, porno, fighting and disrespect of teachers. Design a system or device that will record/expose these challenges.