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3.2. Control technologies
A subsection of Information Technology, 9626, through 3. Monitoring and control
Listing 10 of 22 questions
Chung and Fai both work at the Vacation Hotel. Chung told Fai that the hotel had just installed a car park barrier system to prevent local shoppers from using the car park. He told her that the manager had said that it was a computer-controlled system. Pressure sensors have not been used and it is impossible for the barrier to lower itself on to a car. Describe, in detail, how such a system would operate both for a guest arriving at the hotel and for a guest leaving the hotel.
9626_s20_qp_13
THEORY
2020
Paper 1, Variant 3
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Sensors are used in both monitoring and control applications. Tick the most accurate statement referring to the use of technology to monitor weather conditions. ✓ Readings from sensors are not processed before being output. A sound sensor is the sensor most frequently used in a weather station. Rainfall is measured using a computerised measuring stick. Graphs can be produced automatically from a weather monitoring system. Tick the most accurate statement referring to the use of technology when used in systems which control traffic lights. ✓ An actuator is the most important input device in such a system. The timing sequence of the traffic lights is randomly generated. An induction loop is used to detect the presence of an automobile. Traffic light systems use moisture sensors to detect the presence of pedestrians. Describe the inputs, processing and outputs involved in the cooking of a meal using a microprocessor-controlled oven. Include the devices required in your answer.
9626_s21_qp_12
THEORY
2021
Paper 1, Variant 2
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Questions Discovered
22