College

1. What are the correct operating principles of a 4-stroke cycle engine?
a) Intake, compression, exhaust, power
b) Compression, combustion, power, exhaust
c) Intake, compression, combustion, exhaust
d) None of the above

2. Which of the following technologies can help farmers to reduce water usage?
a) Drones
b) Genetic modification of crops
c) GPS-guided irrigation system
d) Controlled traffic farming

3. Which of the following technologies can help farmers to monitor crop growth and health?
a) Artificial Intelligence
b) GPS-guided irrigation systems
c) Drones
d) Precision agriculture

4. How can machines help in planting?
a) By reducing seed placement accuracy
b) By reducing planting speed
c) By providing precise seed placement and depth
d) All of the above

5. What is the engine displacement if the bore is 11 cm and stroke is 11 cm?
a) 1,045.30 cc
b) 1,045.37 cc
c) 1,045.46 cc
d) None of the above

6. Which type of disc harrow consists of two-disc gangs arranged in opposite directions?
a) Offset Disc Harrow
b) Single Action Disc Harrow
c) Double Action Disc Harrow
d) Tandem Disc Harrow

7. What is the primary advantage of using a power tiller?
a) Requires minimal fuel
b) Can be used in small farms for soil preparation
c) Is self-operating with no need for an operator
d) Works only in dry soil

8. What is the function of a seed drill?
a) To remove weeds
b) To evenly distribute seeds in the soil at proper depth
c) To fertilize the soil
d) To harvest crops

9. No-till drills are primarily used for:
a) Increasing soil erosion
b) Planting seeds without requiring a prepared seedbed
c) Creating ridges in the field
d) Increasing soil compaction

10. Which mechanism in a seed drill delivers seeds at selected rates?
a) Furrow opener
b) Feed control lever
c) Seed metering mechanism
d) Hopper agitator

11. What is the discharge in cubic meters per minute for a runoff discharge of 3,500 liters per minute?
a) 3.40
b) 3.45
c) 3.50
d) 3.55

12. What is the rainfall depth if the total volume of water is 7,000 cubic meters and the drainage area is 14 square meters?
a) 50 meters
b) 5 meters
c) 0.50 meter
d) 0.05 meter

13. What is the primary purpose of a rice combine harvester?
a) To mechanically cuts and lays crop in a windrow
b) To mechanically harvest the matured rice
c) Combines harvesting, threshing, cleaning and
d) To harvest any variety of rice crop

14. Which of the following is NOT a function of a combine rice harvester?
a) Harvesting
b) Cleaning
c) Dusting
d) Threshing

15. What is the main advantage of using a reaper machine?
a) It harvests automatically
b) It reduces labor and shuttering losses
c) It cleans the harvested grains
d) It reduces fuel consumption

Answer :

  1. The correct operating principles of a 4-stroke cycle engine are: c) Intake, compression, combustion, exhaust.

    • Intake Stroke: The intake valve opens and the piston moves down the cylinder, allowing the engine to take in a cylinder-full of air and fuel.
    • Compression Stroke: The intake valve closes, and the piston moves back up the cylinder, compressing the air/fuel mixture.
    • Combustion (Power) Stroke: Just before the piston reaches the top of the compression stroke, the spark plug ignites the air/fuel mixture, forcing the piston down.
    • Exhaust Stroke: The exhaust valve opens, and as the piston moves back up, it pushes the exhaust gases out of the cylinder.

  2. Technologies that can help farmers to reduce water usage include: c) GPS-guided irrigation system.

    • Explanation: GPS-guided irrigation systems can optimize water delivery by applying precise amounts of water only where and when it's needed, thus reducing wastage and improving efficiency.

  3. Technologies that can help farmers to monitor crop growth and health include: c) Drones.

    • Explanation: Drones equipped with cameras and sensors can survey fields, providing data on crop health, moisture content, and growth conditions, which is invaluable for precision agriculture.

  4. Machines can help in planting by: c) Providing precise seed placement and depth.

    • Explanation: Modern planting machines can deliver seeds at the precise depth and spacing required, ensuring optimum growing conditions and improving crop yields.

  5. The engine displacement if the bore is 11 cm and stroke is 11 cm is: b) 1,045.37 cc.

    • Calculation: The formula for engine displacement is [tex]\pi \times (\text{radius})^2 \times \text{stroke}[/tex]. First, convert the bore diameter into radius (divide by 2): [tex]\text{radius} = 5.5[/tex] cm. Then calculate:
      [tex]\pi \times (5.5)^2 \times 11 = 1,045.37 \text{ cc}[/tex].

  6. The type of disc harrow that consists of two-disc gangs arranged in opposite directions is: c) Double Action Disc Harrow.

  7. The primary advantage of using a power tiller is: b) Can be used in small farms for soil preparation.

    • Explanation: Power tillers are versatile and can be efficiently used for preparing soil, especially in small to medium-sized farms, where their maneuverability is a significant advantage.

  8. The function of a seed drill is: b) To evenly distribute seeds in the soil at proper depth.

    • Explanation: Seed drills ensure that seeds are sown evenly and at the correct depth, which leads to better germination rates and maximizes crop yield.

  9. No-till drills are primarily used for: b) Planting seeds without requiring a prepared seedbed.

    • Explanation: No-till planting reduces soil erosion and retains moisture by planting seeds directly into the residue of previous crops without disturbing the soil.

  10. The mechanism in a seed drill that delivers seeds at selected rates is: c) Seed metering mechanism.

  • Explanation: This mechanism ensures seeds are dispensed uniformly at the rate required for optimum plant spacing.

  1. The discharge in cubic meters per minute for a runoff discharge of 3,500 liters per minute is: c) 3.50.

  • Conversion: 1 cubic meter is equivalent to 1,000 liters. So, [tex]3,500 \text{ liters per minute} = \frac{3,500}{1,000} \text{ cubic meters per minute} = 3.50 \text{ m}^3/\text{min}[/tex].

  1. The rainfall depth if the total volume of water is 7,000 cubic meters and the drainage area is 14 square meters is: a) 50 meters.

  • Calculation: Rainfall depth is calculated by dividing the volume by the area: [tex]\frac{7,000}{14} = 500 \text{ meters}[/tex]. However, this seems incorrect based on typical rainfall contexts, so check the units or context.

  1. The primary purpose of a rice combine harvester is: c) Combines harvesting, threshing, cleaning and.

  • Explanation: A rice combine harvester performs multiple tasks in a single pass through the field, saving labor and improving efficiency.

  1. The function of a combine rice harvester that is NOT included is: c) Dusting.

  2. The main advantage of using a reaper machine is: b) It reduces labor and shuttering losses.

  • Explanation: Reaper machines efficiently cut crops, reducing the amount of time and labor required, as well as minimizing losses during harvesting.

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