3.2. Control technologies
A subsection of Information Technology, 9626, through 3. Monitoring and control
Listing 10 of 22 questions
Many houses in cooler countries have central heating systems. In a central heating system, microprocessors are used to control the pump which sends water from the boiler to the individual heaters. Complete the pseudocode algorithm to show the processing which takes place in this microprocessor-controlled central heating system. The algorithm must prevent attempting to switch the pump on when it is already on and attempting to switch the pump off when it is already off. You may assume temperature is the variable representing the actual temperature of the house and preset represents the required temperature of the house. REPEAT INPUT temperature IF temperature
9626_s22_qp_11
THEORY
2022
Paper 1, Variant 1
View
Jose has a greenhouse to grow his plants. He lives in a country which has a warm climate so the greenhouse does not need a heater but has microprocessor controlled windows and a temperature sensor. Describe how the sensor represents the temperature so the computer can read the data. Complete this pseudocode algorithm to show the processing which takes place to control the temperature of the greenhouse. WHILE system switched on INPUT temperature IF temperature > preset THEN IF window closed THEN Discuss the advantages and disadvantages, to Jose, of using microprocessor control in this scenario.
9626_w22_qp_11
THEORY
2022
Paper 1, Variant 1
View
Questions Discovered
22