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WorksheetsTEAM KRISHI
Total questions: 40
Worksheet time: 28mins
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Which sensor is most suitable for automatically controlling drip irrigation in a field?
Light intensity sensor
Soil moisture sensor
Rain sensor only
GPS sensor
A soil moisture sensor in a smart farm mainly helps to
Decide which crop to grow next season
Measure fertilizer price
Avoid over- and under-irrigation
Detect pesticide residues in grains
In a greenhouse, which combination of sensors is most important to maintain crop-friendly climate?
GPS, vibration, proximity sensors
Temperature, humidity, light sensors
Sound, smoke, tilt sensors
RFID tags only
A farmer wants to monitor nitrogen, phosphorus, and potassium levels in soil using IoT. Which device is needed at field level?
Ultrasonic distance sensor
Soil nutrient (NPK) sensor
Speed sensor
Heart-rate sensor
Data from field sensors is usually sent to the cloud using:
Mechanical gears
Wireless communication modules (e.g., LoRa, Wi‑Fi)
Only manual USB transfer
Printed reports
A camera with image-processing used to detect pest attack on leaves is an example of:
Manual inspection
IoT-based visual sensor system
Chemical sensor only
Thermal power system
Which sensor is best for detecting water level in an irrigation tank remotely?
Ultrasonic level sensor
Smoke sensor
Infrared motion sensor
Force sensor
In precision agriculture, GPS and IoT sensors together mainly help to
Increase land size
Map field variability and apply inputs precisely
Change crop color
Reduce internet usage
If an IoT node in the field runs on a small battery, which feature is most important?
High power consumption
Always-on bright display
Low-power operation and sleep modes
Heavy metal casing
Capillary action in soil mainly helps plants by:
Blocking water movement completely
Evaporating all water quickly
Moving water upward from wet to dry regions
Keeping water only on the surface
Which sensor is most useful for monitoring milk storage conditions in a dairy farm?
Soil moisture sensor
Vibration sensor
Temperature sensor
Wind speed sensor
Which physical property of soil affects how fast water moves through it?
Crop variety
Market price of seeds
Soil color only
Bulk density and porosity
A farmer uses a sprinkler system. Which physics concept explains the fine spray formation?
Surface tension and pressure difference
Sound resonance
Magnetic flux
Nuclear fission
On a cold night, plastic mulching sheet helps crops mainly by
Increasing convective heat loss to air
Generating enough electricity to heat the field
Reducing heat loss from soil
Blocking plant respiration completely
The pH of soil is important because it:
Changes the mechanical strength of tractors
Affects only the hardness of irrigation water
Only determines soil color for visual appeal
Controls nutrient availability to plants
A farmer adds lime to a very acidic soil. The main purpose is to:
Rapidly cool the soil during summer
Make soil more acidic for all crops
Neutralize acidity and improve pH
Kill all soil organisms, including beneficial ones
Evapotranspiration in crops refers to:
Combined water loss from soil and plant leaves
Only transpiration from leaves
Only evaporation from open water bodies
Only condensation on leaf surfaces at night
Excessive use of chemical fertilizers over time can:
Always improve soil health regardless of dose
Lead to soil degradation and pollution
Convert sandy soil instantly into clayey soil
Increase rainfall over that farm alone
Which of the following is a macronutrient for plants?
Iron (Fe)
Zinc (Zn)
Nitrogen (N)
Copper (Cu)
Osmosis in plant roots refers to movement of water:
From higher to lower water potential through a membrane
From roots directly into air as vapour
From atmosphere into soil pores without a membrane
From seeds into air pockets in storage
A farmer stores grains with moisture higher than recommended. Physically and chemically, this mostly leads to:
No measurable effect on grain quality
Higher respiration, fungal growth, and spoilage
Decrease in microbial activity to zero
Instant dehydration of the grains
A farmer sells produce immediately after harvest to middlemen at low prices. Which solution is most helpful?
Burning unsold produce to reduce supply
Using storage and selling later or via farmer producer groups
Avoiding markets with any price information
Harvesting earlier to accept even lower prices
Due to lack of nearby cold storage, a vegetable farmer loses a large portion of the harvest. Which measure helps most?
Deliberately delaying harvest until full spoilage
Collective investment in local cold storage or mobile cooling
Storing produce in sealed bags under direct sun
Washing and leaving produce wet in open heap
Farmers are not aware of new technologies like IoT sensors or improved varieties. What should be encouraged?
Limiting information only to large commercial farmers
Regular training through Krishi Vigyan Kendras and extension services
Sharing information only through complex English reports
Withholding all technology information to avoid confusion
A farmer growing tomato faces frequent price crashes during peak season. Which option can stabilize income?
Processing into products and staggering planting
Destroying crops whenever prices fall
Planting only tomato in every season at the same time
Stopping any contact with buyers until prices rise
A dairy farmer wants to improve milk yield and animal health. Which action is most fundamental?
Reducing feed to cut daily costs
Increasing only milking frequency without other changes
Providing balanced nutrition, clean water, and regular veterinary care
Keeping animals tied in ventilated, dirty sheds
In a greenhouse, a team must choose between a cheap resistive soil moisture sensor and a costlier capacitive soil moisture sensor for continuous monitoring integrated with IoT. Which is the most technically sound justification for choosing the capacitive sensor despite higher cost?
Capacitive sensors consume more power, so they must be better
Capacitive sensors are generally less affected by soil salinity and corrosion, giving more stable long-term readings
Resistive sensors cannot be interfaced with microcontrollers at all
Capacitive sensors work only in completely dry soils, avoiding sensor damage
A tractor’s power take-off (PTO) shaft is used mainly to:
Provide hydraulic pressure for steering only
Transmit mechanical power from tractor engine to implements like rotavator or pump
Control the tractor’s braking system
Adjust tyre inflation pressure during operation
For a combine harvester operating in a wheat field, which combination best minimizes grain losses and mechanical damage?
High forward speed and high drum speed
Low forward speed and excessively high drum speed
Optimized forward speed with correct drum speed and proper concave clearance
Random speed setting with fully closed sieves
A farmer wants to reduce fuel consumption during tillage by selecting suitable implements. Which of the following changes is most appropriate from a mechanical/energy point of view for light soils?
Use a heavy moldboard plough instead of a cultivator
Use a rotavator with maximum tillage depth
Use a shallow-tillage cultivator or harrow with reduced draft requirement
Always operate tractor at maximum engine RPM regardless of load
If you are selected for Team Krishi, how much time per week can you realistically dedicate to the group?
Less than 2 hours per week
2–4 hours per week
4–6 hours per week
More than 6 hours per week
Why do you want to join Team Krishi at RV College of Engineering?
To simply increase the count of clubs on resume
Genuine interest in solving farmer and agriculture problems using technology
Only because close friends are joining
To avoid responsibility in other teams
Which statement best describes your approach to contributing ideas in Team Krishi?
Prefer to copy existing projects without any modification
Want to observe real farmer problems and design practical tech solutions
Prefer only theoretical discussions, no field exposure
Prefer working strictly alone with minimal team interaction
A tractor’s three-point hitch allows mounted implements (like ploughs) to “float” and follow ground contours. Mechanically, what enables this behavior?
Fixed rigid mounting without any linkage joints
Hydraulic lift with draft control and articulated linkages
Direct welding of implement frame to tractor chassis
Use of only the top link without lower links
In a 4WD tractor equipped with a low-range transfer case, when would a farmer most appropriately use the low-range mode during field operations?
During fast haulage of trailers on paved roads
During high-speed transport of produce to the market
During heavy draft operations like deep ploughing in tough soil where high torque at low speed is required
During idling in the farmyard with no implement attached
