Instrumentation and Control Systems in Agriculture MCQs

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1. : What is the main purpose of instrumentation in agriculture?
(A) Entertainment
(B) Measuring and monitoring physical parameters for farm management
(C) Farmer’s income estimation
(D) Broadcasting seeds

2. : Which device is used to measure soil moisture in agriculture?
(A) Tensiometer
(B) Thermometer
(C) Altimeter
(D) Barometer

3. : A hygrometer is used to measure:
(A) Air humidity
(B) Soil fertility
(C) Water salinity
(D) Solar radiation

4. : In greenhouses, temperature control is often automated using:
(A) Thermostats and sensors
(B) Farmer’s observation
(C) Random guesswork
(D) Radio devices

5. : Which sensor measures solar radiation in agriculture?
(A) Pyranometer
(B) Hygrometer
(C) Anemometer
(D) Barometer

6. : Control systems in irrigation are designed to:
(A) Automate water supply based on soil moisture levels
(B) Entertain farmers
(C) Measure crop prices
(D) Broadcast radio

7. : Which type of control system is widely used in agricultural machinery?
(A) Feedback control system
(B) Random control system
(C) Manual-only control
(D) None of the above

8. : Anemometer is used in agriculture to measure:
(A) Wind speed
(B) Soil depth
(C) Water quality
(D) Crop color

9. : Precision spraying systems rely on:
(A) Flow sensors and pressure regulators
(B) Farmer’s eyesight only
(C) Random application
(D) Weather news

10. : Which sensor is used for monitoring CO₂ levels in greenhouses?
(A) NDIR (Non-Dispersive Infrared) sensor
(B) Tensiometer
(C) GPS sensor
(D) Ultrasonic sensor

11. : PLC in agriculture stands for:
(A) Programmable Logic Controller
(B) Public Land Code
(C) Plant Life Cycle
(D) Pressure Level Control

12. : Which of the following is an output device in control systems?
(A) Actuators like pumps and motors
(B) Soil sample
(C) Rainfall data
(D) Farmer notebook

13. : Automatic fertigation systems use sensors to control:
(A) Nutrient and water supply in irrigation
(B) Seed germination rate
(C) Tractor speed
(D) Crop marketing

14. : Which instrument is commonly used to measure soil pH?
(A) pH meter
(B) Hygrometer
(C) Anemometer
(D) Tensiometer

15. : The term SCADA in agriculture refers to:
(A) Supervisory Control and Data Acquisition
(B) Soil Classification and Drainage Act
(C) Smart Crop and Digital Analysis
(D) Sensor Calibration and Data Accuracy

16. : Which control system is used in automated irrigation scheduling?
(A) Closed-loop control system
(B) Open diary records
(C) Random field survey
(D) Farmer’s manual check

17. : Which sensor measures rainfall in agriculture?
(A) Rain gauge
(B) Pyranometer
(C) Hygrometer
(D) Thermistor

18. : Remote-controlled drones in agriculture rely on:
(A) GPS and control systems
(B) Farmer’s shouting
(C) Weather radios only
(D) Soil moisture alone

19. : The main advantage of control systems in agriculture is:
(A) Improved efficiency and reduced manual labor
(B) Increased entertainment value
(C) Random yield fluctuations
(D) Higher TV ratings

20. : Which device measures water salinity in irrigation?
(A) EC (Electrical Conductivity) meter
(B) Hygrometer
(C) Tensiometer
(D) Pyranometer

21. : In agriculture, automation of greenhouse climate depends on:
(A) Temperature, humidity, CO₂, and light sensors
(B) Market price sensors
(C) Farmer’s memory
(D) Manual wall charts

22. : Which type of sensor is used to measure leaf wetness?
(A) Leaf wetness sensor (resistance/capacitance type)
(B) Barometer
(C) Anemometer
(D) Tensiometer

23. : Control valves in irrigation systems are operated by:
(A) Solenoids and actuators
(B) Farmer’s handwriting
(C) Manual drawings
(D) Radio frequency only

24. : Which sensor is commonly used for soil nutrient monitoring?
(A) Ion-selective electrodes
(B) Anemometer
(C) Thermometer
(D) Rain gauge

25. : The future of instrumentation and control systems in agriculture focuses on:
(A) AI-based automation, IoT integration, and robotics
(B) Manual farming methods only
(C) Ignoring technology
(D) Handwritten logbooks