Introduction To Industry 4.0 And Industrial Internet Of Things Week 1 NPTEL Assignment Answers 2025

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✅ Subject: Introduction To Industry 4.0 And Industrial Internet Of Things (iot 4.0)
📅 Week: 1
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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Introduction To Industry 4.0 And Industrial Internet Of Things Week 1 NPTEL Assignment Answers 2025

1. Which sensor system type is characterized by an output that oscillates before reaching steady state?

a. Zero order system
b. First order system
c. Second order system
d. Linear system

Answer : See Answer 

2. Which of the following is NOT a correct example of a transducer?

a. Microphone
b. Wire
c. Speaker
d. Antenna

Answer :

3. The response of which of the following sensors depends on the magnitude of the direction and orientation of input parameter?

a. Scalar sensor
b. Passive sensor
c. Analog sensor
d. Vector sensor

Answer :

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4. Which type of Zigbee node is responsible for network initialization and maintenance?

a. Router
b. End Device
c. Coordinator
d. Sensor

Answer :

5. Which two layers does IEEE 802.15.4 provide a framework for?

a. MAC and PHY
b. IP and TCP
c. HTTP and SSL
d. FTP and DNS

Answer :

6. How often are time slots allocated in Wireless HART?

a. 1 per second
b. 10ms per slot
c. 100ms per slot
d. 1 second per device

Answer : For Answers Click Here 

7. How do passive RFID tags operate?

a. Use an internal battery
b. Use an external solar panel
c. Are powered by the reader inductively
d. Are manually activated

Answer :

8. Bluetooth technology is based on which type of networking?

a. Mesh
b. Piconet (Ad-hoc)
c. Star
d. Bus

Answer :

9. What process is used by Z-wave to bypass radio dead spots?

a. Network Slicing
b. Subnetting
c. Healing
d. Network Partitioning

Answer :

10. Which of the following best represents the ‘trunk’ in the IoT analogy?

a. ARM (Architectural Reference Model)
b. IoT applications
c. Communication protocols
d. End-user interfaces

Answer : 

11. What is the function of the Registration Interface (RI) in CoRE?

a. Processes user login
b. Assigns MAC addresses
c. Encrypts transmitted data
d. Registers IoT resources to the directory

Answer :

12. Which of the following is not a message type in CoAP?

a. CON
b. NON
c. RST
d. ECHO

Answer :

13. Which of the following is an IP-based solution proposed by IETF for IoT?

a. Zigbee Alliance
b. Bluetooth SIG
c. CoRE
d. Wi-Fi Alliance

Answer :

14. State true or false. Sensor calibration is typically used for weeding-out repeatable errors in sensor readings.

a. True
b. False

Answer :

15. Which of the following is NOT true about WirelessHART?

a. It is a license-free protocol
b. It is not compatible with any legacy devices
c. WirelessHART uses the IEEE 802.15.4 standard for its protocols designing
d. WirelessHART makes device placements more accessible and cheaper

Answer : For Answers Click Here 

NPTEL Introduction To Industry 4.0 And Industrial Internet Of Things Week 1 Assignment Answers 2024

Q1. What is a transducer?
a. A device that converts energy from one form to another
b. A type of sensor that detects only energy
c. A digital communication device
d. A part of a computer processor

Answer: a
Explanation: A transducer converts one form of energy into another, such as a microphone converting sound into electrical signals.

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Q2. What does sensor accuracy refer to?
a. The range of the sensor
b. The smallest detectable input change
c. The correctness of the output compared to a standard value
d. The sensor’s response time

Answer: c
Explanation: Accuracy refers to how close the sensor’s output is to the actual or true value.

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Q3. What is an active sensor?
a. A sensor that can only sense physical changes
b. A sensor that operates without an external power source
c. A sensor that independently senses the input
d. A sensor that operates without any energy consumption

Answer: c
Explanation: Active sensors emit energy and measure the response, enabling them to function independently in detecting inputs.

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Q4. What does ‘Actuator’ primarily refer to in IIoT systems?
a. A device that stores data
b. A device that processes information
c. A device that converts signals into physical action
d. A device that enhances signal strength

Answer: c
Explanation: An actuator takes signals from controllers and converts them into physical movement or action, such as opening a valve.

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Q5. Zigbee technology is popular for
a. Long-range communications
b. High power consumption
c. Low-cost, low-power wireless mesh networks
d. High data rate transfer

Answer: c
Explanation: Zigbee is used for low-power, low-data-rate applications like smart home devices and industrial automation using mesh networks.

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Q6. Which of the following is true about 6LoWPAN?
a. It is used for high-power industrial networks
b. It enables IPv6 packets over low-power wireless networks
c. It focuses on high-speed ethernet
d. It’s a standard for satellite communications

Answer: b
Explanation: 6LoWPAN stands for IPv6 over Low-Power Wireless Personal Area Networks, enabling IoT devices to use IPv6.

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Q7. Near Field Communication (NFC) is typically used for:
a. Long-range satellite communications
b. High-power industrial networks
c. Short-range wireless interaction between electronic devices
d. Storing large amounts of data

Answer: c
Explanation: NFC allows short-range communication (a few centimeters) between devices, such as contactless payment systems.

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Q8. Which of the following actuators work on the principle of compression and decompression?
a. Hydraulic Actuators
b. Thermal Actuators
c. Electric Actuators
d. Mechanical Actuators

Answer: a
Explanation: Hydraulic actuators use fluid pressure (compression and decompression) to produce movement.

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Q9. ISA 100.11a is significant in IIoT because it
a. Provides high-speed internet connectivity
b. Focuses on wireless network technology for industrial automation
c. Is used for long-range satellite communications
d. Enhances Bluetooth signal strength

Answer: b
Explanation: ISA 100.11a is a standard for wireless systems in industrial environments, ensuring reliable and secure communication.

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Q10. What is the primary function of IEEE 802.15.4 in IoT?
a. High-speed data transmission
b. Providing security algorithms
c. Establishing low-rate wireless personal area networks
d. Data storage and retrieval

Answer: c
Explanation: IEEE 802.15.4 is designed for low-rate wireless personal area networks (LR-WPANs) used in IoT communications.

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Q11. Z-Wave technology is best suited for
a. Industrial communication
b. Home automation
c. Satellite communication
d. High-speed internet

Answer: b
Explanation: Z-Wave is a wireless communication protocol mainly used in smart home automation devices.

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Q12. What is the maximum data rate possible in Wireless HART?
a. 2500 b/s
b. 2.5 mb/s
c. 250 kb/s
d. None of the above

Answer: c
Explanation: Wireless HART supports data rates up to 250 kbps, suitable for industrial wireless sensor networks.

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Q13. QoS 2 in MQTT is also known as
a. At most once
b. At least once
c. Exactly once
d. None of the above

Answer: c
Explanation: QoS 2 ensures the message is delivered exactly once without duplication, which is the highest level of service in MQTT.

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Q14. CoAP works on Request/Response framework based on the _________ architecture.
a. UDP
b. TCP
c. SCTP
d. DCCP

Answer: a
Explanation: CoAP (Constrained Application Protocol) uses UDP for lightweight communication suitable for constrained devices.

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Q15. Infra-red sensor is an example of
a. Acoustic Sensor
b. Mechanical Sensor
c. Electrical Sensor
d. Optical Sensor

Answer: d
Explanation: Infrared sensors detect infrared radiation and are classified under optical sensors due to their light-based detection method.