Cambridge IGCSE · Computer Science (0478)

Automated systems: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Automated systems.

10 questions22 marksFree, no account

Question 1

1 mark

In an automated system used for street lighting, which type of sensor is most likely used to detect when it is becoming dark?

Question 2

1 mark

In an automated industrial manufacturing plant, which of the following is a significant advantage over manual labor?

Question 3

1 mark

Which of the following best describes the feedback loop in an automated temperature control system?

Question 4

1 mark

In an automated system, what is the primary role of a sensor?

Question 5

1 mark

A moisture sensor in an automated irrigation system detects that the soil is dry. Which of the following describes the most likely action taken by the microprocessor?

Question 6

2 marks

Define the term actuator and state its role in an automated system.

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Question 7

3 marks

Explain why an Analog-to-Digital Converter (ADC) is required when a sensor is connected to a microprocessor in an automated system.

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Question 8

5 marks

In an automated greenhouse, a temperature sensor sends a value \( T \) to a microprocessor. Explain the logic used by the microprocessor to maintain a constant temperature if the required range is \( 20 \le T \le 25 \).

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Question 9

3 marks

Explain the concept of an automated system and identify the three main hardware components that work together in a collaboration to create one.

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Question 10

4 marks

An automated system is used to control the environment in a commercial greenhouse. If the temperature rises above \(25^{\circ}C\), a fan is turned on.

(a) Identify the sensor and actuator used in this system.
(b) Describe the process the microprocessor follows to control the fan.

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