Question

Which of the following is not connected with tractor performance test?

• A. Engine output (measured by belt or power take off dynamometers)
• B. Fuel economy
• C. Drawbar pull, drawbar horsepower and drawbar fuel company
• D. Braked and driven force

Hint:

Focus on key performance factors such as engine output, fuel economy, and drawbar pull for evaluating tractor efficiency.

Answer 1

The Correct Option is A

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: \[ \boxed{4. (1), (3), and (4) only} \]