Welcome and Instructions
Welcome to this IELTS Reading practice test on the theme of the Internet of Things (IoT) — the network of everyday objects that connect to the internet and to each other. Whether you are preparing for the General Training or the Academic module, this test has been designed to help you build the reading speed, vocabulary, and question-handling skills you need on exam day.
Format:
- Academic version: One longer, more complex passage on a scientific topic, followed by 9 mixed questions in total.
Time limit: Give yourself 20 minutes to complete each version. This mirrors the pace you’ll need on test day, when you must read quickly, locate information efficiently, and manage your time across multiple texts or a longer passage
The Internet of Things: Transforming Industry and Society
A. The Internet of Things (IoT) refers to the expanding web of physical devices — sensors, machines, vehicles, and appliances — that are embedded with software allowing them to collect and exchange data over digital networks. Unlike the traditional internet, which primarily connects people through screens and keyboards, the IoT connects objects to one another, often with minimal or no human involvement. Analysts estimate that tens of billions of such devices are now in operation worldwide, a figure that continues to rise as the underlying technology becomes cheaper and more energy-efficient.
B. The architecture behind the IoT typically involves three layers. The first is the perception layer, made up of the physical sensors and actuators that gather raw data, such as temperature, motion, or location. The second is the network layer, responsible for transmitting this data via technologies such as Wi-Fi, cellular networks, or short-range protocols designed specifically for low-power devices. The third is the application layer, where the data is processed, analysed, and turned into something useful — a temperature reading becomes an automatic adjustment to a thermostat, or a location signal becomes a real-time delivery update for a customer.
C. Industry has been among the earliest and most enthusiastic adopters of this technology, in a trend often labelled the Industrial Internet of Things (IIoT). On factory floors, sensors attached to machinery can detect subtle vibrations or temperature changes that indicate a part is about to fail, allowing engineers to schedule repairs before a breakdown halts production. This approach, known as predictive maintenance, stands in contrast to older models of either fixing equipment only after it fails or servicing it on a fixed schedule regardless of its actual condition. Logistics companies have applied similar principles to their vehicle fleets, using GPS-enabled sensors to monitor fuel consumption, driving behaviour, and cargo conditions in real time, which has led to measurable reductions in operating costs.
D. Agriculture, too, has been reshaped by connected sensor networks. So-called precision farming uses soil sensors to measure moisture and nutrient levels across a field, enabling farmers to irrigate and fertilise only where and when it is needed, rather than applying resources uniformly across an entire plot. Early studies suggest this targeted approach can reduce water usage substantially while maintaining or even improving crop yields, a particularly significant outcome in regions where water scarcity is a growing concern.
E. Despite these advantages, the rapid expansion of the IoT has introduced significant challenges, chief among them being security. Many connected devices are designed with cost and convenience as the primary considerations, often at the expense of robust security features. A device with weak or default passwords can be hijacked by malicious actors and enlisted, along with thousands of others, into a network used to overwhelm websites with fraudulent traffic — an attack known as a distributed denial-of-service, or DDoS, attack. Such incidents have already disrupted major online services and have prompted calls for stricter regulatory standards governing how manufacturers design and update their products.
F. A further concern involves the sheer volume of data these devices generate. Some estimates suggest that connected devices collectively produce an amount of data each day that would have been almost unimaginable only a decade ago. Storing, transmitting, and analysing this data requires substantial computing infrastructure, which has driven interest in an approach known as edge computing. Rather than sending every piece of raw data to a distant, centralised server, edge computing processes information closer to where it is generated, reducing delays and easing the burden on network bandwidth. This is particularly valuable in applications where a rapid response is essential, such as in autonomous vehicles reacting to a sudden obstacle.
G. Looking ahead, researchers anticipate that the IoT will become increasingly intertwined with other emerging technologies, particularly artificial intelligence. Rather than merely collecting and transmitting data, future devices are expected to analyse information locally and make autonomous decisions with limited human oversight. Whether society is fully prepared for the ethical, legal, and security implications of such a shift remains a subject of vigorous debate among policymakers, engineers, and academics alike.
Academic Questions 1–9
Answer the following questions based on the passage above. The questions follow the order of information in the text.
Question 1
The passage below has seven paragraphs, A–G. Choose the correct heading for Paragraph B from the list below. Write the correct number.
List of Headings
i. The environmental risks of connected farming
ii. The three-part structure of IoT systems
iii. A growing threat to online security
iv. Processing data closer to its source
v. Machines that predict their own failure
Question 2
Do the following statements agree with the information given in the passage?
Write TRUE, FALSE, or NOT GIVEN. The number of active IoT devices worldwide is expected to decline in the coming years.
Question 3
Complete the sentence below using NO MORE THAN THREE WORDS from the passage. In industrial settings, sensors that detect early signs of equipment failure support a strategy called _______________.
Question 4
Which paragraph contains information about a farming method that targets the use of water and nutrients only where needed? Write the correct letter, A–G.
Question 5
According to the passage, what is one likely outcome of precision farming in areas facing water shortages?
A. Higher costs for farmers
B. Reduced reliance on soil sensors
C. Lower water usage without a drop in crop yields
D. Increased use of manual irrigation
Question 6
Do the following statements agree with the claims of the writer in the passage? Write YES, NO, or NOT GIVEN. Weak security in connected devices has contributed to large-scale disruptions of online services.
Question 7
Complete the sentence below using NO MORE THAN THREE WORDS from the passage. An attack that floods a website with fake traffic using hijacked devices is known as a _______________ attack.
Question 8
What approach does the passage describe as a solution to the delays caused by sending data to distant servers? Write NO MORE THAN THREE WORDS from the passage.
Question 9
According to the final paragraph, what remains uncertain as IoT devices become more closely linked with artificial intelligence?
A. Whether the devices will become too expensive
B. Whether society is ready for the ethical and legal consequences
C. Whether engineers can build smaller sensors
D. Whether farmers will adopt the new technology
Have a Go and Share Your Answers!
We’d love to see how you did. Write your answers in the comments below, and we’ll reply with feedback and confirmation. The full answer key will be posted in a follow-up comment shortly after, so give the test an honest attempt before you check!
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