NPTEL Introduction to Industry 4.0 and Industrial Internet of Things Week 1 Assignment Answers 2024 (July-October)

The NPTEL course "Introduction to Industry 4.0 and Industrial Internet of Things" is designed to offer a comprehensive understanding of the latest advancements in industrial automation and data exchange technologies. This course is scheduled from July to October 2024, focusing on equipping learners with the knowledge and skills required to thrive in the evolving industrial landscape.

Importance of Industry 4.0 and IIoT

Industry 4.0 and IIoT are revolutionizing the manufacturing and industrial sectors by integrating advanced technologies such as artificial intelligence, machine learning, big data analytics, and the Internet of Things (IoT). These innovations enhance efficiency, productivity, and decision-making processes in industries worldwide.

Question 1

What is the primary function of a transducer?

a. To store energy
b. To convert signal from one physical form to another physical form
c. To generate eddy current
d. To generate heat

Answer: b. To convert signal from one physical form to another physical form

Explanation: A transducer is a device that converts one form of energy into another. Its primary function is to convert a physical signal from one form to another, for example, converting mechanical energy into electrical energy.

Question 2

Which device converts sound to an electrical signal?

a. Speaker
b. Antenna
c. Microphone
d. Strain gauge

Answer: c. Microphone

Explanation: A microphone is a device that converts sound (acoustic energy) into an electrical signal. It captures sound waves and converts them into electrical signals for amplification or recording.

Question 3

Which sensor can detect gases like LPG, CH4, and CO?

a. DHT22
b. MQ-5
c. HC-SR04
d. PIR

Answer: b. MQ-5

Explanation: The MQ-5 sensor is designed to detect gases such as LPG, CH4, and CO. It is commonly used in gas leak detection systems and other applications requiring gas monitoring.

Question 4

What does 'Resolution' indicate in a sensor?

a. The correctness of the output
b. The smallest change in input that can be detected
c. The range of sensing
d. The difference between standard and measured values

Answer: b. The smallest change in input that can be detected

Explanation: Resolution of a sensor refers to the smallest change in the measured variable that can be detected by the sensor. Higher resolution means the sensor can detect smaller changes.

Question 5

Which modulation technique is used by Zigbee for the 2.4 GHz band?

a. BPSK
b. QPSK
c. OQPSK
d. FSK

Answer: c. OQPSK

Explanation: Zigbee uses Offset Quadrature Phase Shift Keying (OQPSK) modulation for communication in the 2.4 GHz band. OQPSK is a type of phase modulation used to transmit data efficiently.

Question 6

What does 6LoWPAN optimize?

a. Load balancing in Legacy High-power networks
b. Packet transmission in Low-power and lossy networks (LLN)
c. Cryptography in Medium-power networks
d. Error detection in Long-range networks

Answer: b. Packet transmission in Low-power and lossy networks (LLN)

Explanation: 6LoWPAN (IPv6 over Low-power Wireless Personal Area Networks) optimizes packet transmission for low-power and lossy networks, which are typical in IoT applications.

Question 7

How long is the Network ID in a Z-Wave network?

a. 1 Byte
b. 2 Bytes
c. 4 Bytes
d. 8 Bytes

Answer: b. 2 Bytes

Explanation: The Network ID in a Z-Wave network is 2 bytes long. This helps in uniquely identifying the network within which the Z-Wave devices operate.

Question 8

Which range is typical for Class 1 Bluetooth radios?

a. 1 meter
b. 10 meters
c. 30 meters
d. 100 meters

Answer: d. 100 meters

Explanation: Class 1 Bluetooth radios have a typical range of up to 100 meters, which is the highest range among the Bluetooth classes and is used for longer-range communication.

Question 9

What does the Constrained RESTful Environments (CoRE) framework include for service discovery?

a. Registration Interface (RI)
b. Resource Directory (RD)
c. REST based protocols such as HTTP and CoAP
d. All of the above

Answer: d. All of the above

Explanation: The CoRE framework includes multiple components for service discovery, such as Registration Interface, Resource Directory, and REST-based protocols (HTTP and CoAP), making it comprehensive for IoT applications.

Question 10

Which policy controls the duration for which transmitted data is considered to be valid in an IoT network?

a. History policy
b. Latency budget policy
c. Lifespan policy
d. Deadline policy

Answer: c. Lifespan policy

Explanation: The lifespan policy determines how long transmitted data remains valid in an IoT network. It defines the duration for which the data is considered useful and relevant.

Question 11

How many levels of QoS does MQTT support?

a. 2
b. 3
c. 4
d. 5

Answer: b. 3

Explanation: MQTT supports three levels of Quality of Service (QoS): 0 (At most once), 1 (At least once), and 2 (Exactly once). These levels determine the guarantee of message delivery.

Question 12

Which protocol is CoAP based on?

a. TCP
b. FTP
c. UDP
d. HTTP

Answer: c. UDP

Explanation: CoAP (Constrained Application Protocol) is based on UDP (User Datagram Protocol). It is designed for simple, low-power devices that need to communicate over the Internet in constrained environments.

Question 13

For what kind of applications is AMQP optimized for?

a. Entertainment
b. Financial
c. Vehicular
d. Educational

Answer: b. Financial

Explanation: AMQP (Advanced Message Queuing Protocol) is optimized for financial applications where reliable, secure, and guaranteed message delivery is crucial.

Question 14

Which layer in IoT architecture is responsible for predictive analytics and data management?

a. Sensing layer
b. Networking layer
c. Service layer
d. Interface layer

Answer: c. Service layer

Explanation: The service layer in IoT architecture is responsible for data management and predictive analytics. It processes the data collected from the sensing layer and provides meaningful insights.

Question 15

State True or False. A sensor's accuracy does not depend upon its resolution.

a. True
b. False

Answer: b. False

Explanation: A sensor's accuracy is often related to its resolution. Higher resolution allows for more precise measurements, which can improve the overall accuracy of the sensor.