Introduction To Industry 4.0 And Industrial Internet Of Things Week 6 NPTEL Assignment Answers 2025

NPTEL Introduction To Industry 4.0 And Industrial Internet Of Things Week 6 Assignment Answers 2024

1. Which of the following temperature sensors generates an analog voltage proportional to the temperature?

a. DS1621
b. DHT11
c. DS18B20
d. LM35

✅ Answer :- d
Explanation: LM35 is an analog sensor that provides output voltage linearly proportional to temperature.

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2. What are the key components of an IoT Sensing Device?

a. Sensor, Processor, Wireless Communication Module, Power Management Unit
b. Battery, Processor, Universal Serial Bus, Visual Display Unit
c. Sensor, Compiler, Interpreter, Energy Harvester
d. None of the above

✅ Answer :- a
Explanation: These are the essential components required for sensing, processing, communication, and power management.

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3. What kind of sensor is ADXL335?

a. Accelerometer
b. Gyroscope
c. Magnetometer
d. Proximity sensor

✅ Answer :- a
Explanation: ADXL335 is a 3-axis accelerometer used to measure acceleration and tilt.

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4. “MOS gas sensor depend on the thermal energy for its operation which is supplied with a heater.” State True or False.

a. True
b. False

✅ Answer :- a
Explanation: MOS (Metal Oxide Semiconductor) sensors need a heater to activate the chemical sensing reaction.

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5. Which of the following is not a probable application of Gas Sensors?

a. Air quality monitoring
b. Leakage Detection of Toxic gases
c. Alcohol Breath Test
d. Motion Tracking

✅ Answer :- d
Explanation: Gas sensors do not detect motion; they detect gas presence and concentration.

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6. What is meant by the Sensitivity of a Gas Sensor?

a. Change in the output signal for a unit change in gas concentration
b. Ability to detect a particular gas in a mixture of different gases
c. Ability to provide consistent output over a long period of time
d. The time taken by the sensor to stabilize its response

✅ Answer :- a
Explanation: Sensitivity measures how strongly the sensor responds to a gas concentration change.

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7. The ModBus-TCP protocol defines two units in the data frame. One of them is Protocol Data Unit. What is the other one?

a. Analogous Data Unit
b. Advanced Data Unit
c. Application Data Unit
d. Architectural Data Unit

✅ Answer :- c
Explanation: In Modbus-TCP, data is split into Application Data Unit (ADU) and Protocol Data Unit (PDU).

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8. With respect to sensors, a camera which can simultaneously sense the ambient temperature as well as capture live video recordings is a type of_________ sensor.

a. Scalar
b. Multimedia
c. Hybrid
d. All of the above

✅ Answer :- c
Explanation: A hybrid sensor combines multiple sensing capabilities, like video + temperature.

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9. EtherNet/IP defines two primary types of communications. What are those?

a. Explicit and Implicit
b. Internal and External
c. Inbound and Outbound
d. Telemetric and Geometric

✅ Answer :- a
Explanation: EtherNet/IP uses explicit messaging for data exchange and implicit messaging for real-time control.

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10. Which of the following statements is incorrect about Profinet?

a. Profinet is the standard for industrial Ethernet
b. Profinet is based upon Ethernet/IP
c. Profinet cannot be used for process control or process measurement
d. Profinet uses NRT, RT and IRT communication channels

✅ Answer :-c
Explanation: Profinet is used for real-time process control and measurements; statement is incorrect.

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11. Modbus-RTU is a serial protocol that follows the__________ architecture.

a. Producer/Consumer
b. Master/Slave
c. Scalar/Vector
d. None of the above

✅ Answer :- b
Explanation: Modbus-RTU uses a master-slave architecture for communication.

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12. Which of the following network topologies is used by Profibus?

a. Ring Topology
b. Bus Topology
c. Mesh Topology
d. Star Topology

✅ Answer :- b
Explanation: Profibus typically uses bus topology, where devices are connected along a single cable.

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13. In the context of DeviceNet, CAN is the acronym for

a. Cognitive Adaptable Network
b. Campus Area Network
c. Controller Area Network
d. Captive Area Network

✅ Answer :- c
Explanation: CAN (Controller Area Network) is the underlying protocol used by DeviceNet.

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14. How shorter TTL is achieved in uRLLC?

a. By using smaller slot length
b. By reducing Orthogonal Frequency Division Multiplexing symbols in TTL
c. Reducing symbol duration
d. All of the above

✅ Answer :- d
Explanation: All methods reduce latency, achieving ultra-reliable low-latency communication (uRLLC).

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15. What is the frequency spectrum of mmWave Communication?

a. 30 – 300 MHZ
b. 550 – 1720 KHz
c. 88 – 108 MHz
d. 30 – 300 GHz

✅ Answer :- d
Explanation: mmWave (millimeter wave) communication operates in the 30 to 300 GHz range.