Farm Machinery And Power Engineering

Step 1: Understanding the types of power tillers.
- General purpose power tillers are typically coupled with a rotary tiller for general tasks. - Pull type tillers are used for operations requiring a steering mechanism. - Tilling type tillers are used for tasks that involve both rotary and traction work. - Dog type tillers are generally used for tasks like ploughing, leveling, seeding, and transport.
Step 2: Analysis of options.
- (A) General Purpose: Matches with (I) Two-wheel tractor coupled with a rotary tiller. - (B) Pull type: Matches with (II) Steering mechanism. - (C) Tilling type: Matches with (III) Miscellaneous operations for rotary as well as traction work. - (D) Dog type: Matches with (IV) Used for ploughing, leveling, seeding, and transport work.
Step 3: Conclusion.
Thus, the correct matching is (A) - (I), (B) - (II), (C) - (III), (D) - (IV).
Final Answer:

Step 1: Understanding the equations.
Brixius’ traction prediction equations are used for predicting several factors related to the traction performance of vehicles. These equations help estimate the gross traction ratio, the motion resistance ratio, and the coefficient of traction.
Step 2: Analysis of options.
- (A) gross traction ratio: Correct. The equations help predict this factor. - (B) motion resistance ratio: Correct. This is another key factor predicted by the equations. - (C) coefficient of traction: Correct. This is also predicted by Brixius’ equations. - (D) cone index: Incorrect. This is not directly predicted by Brixius' equations.
Step 3: Conclusion.
Thus, the correct answer is (A), (B), and (C) only.
Final Answer:

Step 1: Understanding the components of a plough.
A plough typically consists of a common main frame, disc beam assemblies, and a gauge wheel. A heavy spring-loaded furrow wheel may be an additional feature but is not always part of the plough.
Step 2: Analysis of options.
- (A) Common main frame: Correct. This is a fundamental component of the plough. - (B) Disc beam assemblies: Correct. These are used in ploughs to cut and turn the soil. - (C) Heavy spring-loaded furrow wheel: Incorrect. While this wheel is important for some ploughs, it is not essential in all ploughs. - (D) Gauge wheel: Correct. This controls the depth of the plough during operation.
Step 3: Conclusion.
Thus, the correct answer is (A), (B) and (D) only.
Final Answer:

Step 1: Understanding heat engines.
A heat engine operates by converting heat energy into mechanical energy, which is typically used to perform work. This is the primary function of most engines, such as internal combustion engines in vehicles.
Step 2: Analysis of options.
- (1) Chemical energy: Incorrect. Heat engines do not convert heat into chemical energy directly. - (2) Mechanical energy: Correct. Heat energy is primarily converted into mechanical energy in heat engines. - (3) Kinetic energy: Incorrect. While some mechanical energy may be converted into kinetic energy, heat engines generally convert heat into mechanical energy first. - (4) Potential energy: Incorrect. Heat engines do not directly convert heat into potential energy.
Step 3: Conclusion.
Thus, the correct answer is (2) Mechanical energy.
Final Answer:

Step 1: Understanding tractor performance tests.
Tractor performance tests are used to evaluate key parameters like engine output, fuel economy, and drawbar performance. The braked and driven force, while important, is more related to the dynamics of the vehicle rather than specific tractor performance tests.
Step 2: Analysis of options.
- (1) Engine output: Correct. This is a fundamental aspect of tractor performance testing. - (2) Fuel economy: Correct. Fuel consumption is an important test in tractor performance. - (3) Drawbar pull, drawbar horsepower, and drawbar fuel company: Correct. These are key tests in evaluating tractor performance. - (4) Braked and driven force: Incorrect. This is not directly related to a tractor performance test but is more focused on vehicle dynamics.
Step 3: Conclusion.
Thus, the correct answer is (4) (1), (3), and (4) only.
Final Answer:

Step 1: Understanding Dibbling.
Dibbling refers to a process in agriculture where seeds are placed in pre-made holes in a seedbed and then covered with soil. This method ensures proper seed placement and encourages better germination.
Step 2: Analysis of options.
- (1) placing seeds in holes made in seedbed and covering them: Correct. This is the definition of dibbling. - (2) applying fertilizer by hand: Incorrect. This refers to fertilizing, not dibbling. - (3) removing weeds with the use of a tool: Incorrect. This refers to weeding. - (4) applying chemicals in powder form: Incorrect. This refers to chemical application, not dibbling.
Step 3: Conclusion.
The correct answer is (1) placing seeds in holes made in seedbed and covering them.
Final Answer:

Step 1: Understanding the terms.
- LM = Average sum of the total work done by Tractor machine. - LT = Average sum of the total work done by Human + Average sum of the total work done by Tractor machine.
Step 2: Explanation.
The correct expression for the mechanization index (WME) is:
Step 3: Conclusion.
Thus, the correct formula is option 2.
Final Answer: