Concept:
A tractor consists of several important mechanical systems such as cooling system, lubrication system, transmission system and final drive mechanism.
Each system performs a specialized function to ensure efficient operation of the tractor.
The important associations are:
• Cooling system uses a radiator for heat dissipation.
• Lubrication system may use splash lubrication.
• Power transmission system includes differential mechanism.
• Final drive commonly uses bull gear arrangement.
Understanding the function of each component is essential in agricultural machinery engineering.
Step 1: Matching Cooling System.
The cooling system removes excess heat generated inside the tractor engine.
A radiator is the principal component responsible for transferring engine heat to the atmosphere.
Therefore:
\[
\text{Cooling System} \rightarrow \text{Radiator}
\]
Hence,
\[
A \rightarrow III
\]
Step 2: Matching Lubrication System.
The lubrication system reduces friction and wear between moving engine parts.
One common lubrication method used in engines is the:
\[
\text{Splash system}
\]
In this method, lubricating oil is splashed onto moving parts.
Therefore,
\[
B \rightarrow II
\]
Step 3: Matching Power Transmission System.
The transmission system transfers engine power to the tractor wheels.
The differential is an important transmission component that allows wheels to rotate at different speeds during turning.
Therefore:
\[
\text{Power transmission system} \rightarrow \text{Differential}
\]
Hence,
\[
C \rightarrow IV
\]
Step 4: Matching Final Drive.
The final drive provides the last stage of speed reduction and torque multiplication before power reaches the wheels.
Bull gear is an important component of the final drive mechanism.
Therefore:
\[
D \rightarrow I
\]
Step 5: Writing the final matching sequence.
Combining all the correct matches:
\[
A-III,\; B-II,\; C-IV,\; D-I
\]
This corresponds to:
\[
\boxed{\text{Option (C)}}
\]
Verification Table:
\[
\begin{array}{|c|c|}
\hline
\text{LIST-I} & \text{LIST-II}
\hline
A.\ \text{Cooling System} & III.\ \text{Radiator}
\hline
B.\ \text{Lubrication System} & II.\ \text{Splash system}
\hline
C.\ \text{Power transmission system} & IV.\ \text{Differential}
\hline
D.\ \text{Final drive} & I.\ \text{Bull gear}
\hline
\end{array}
\]
Thus, the correct answer is:
\[
\boxed{A-III,\; B-II,\; C-IV,\; D-I}
\]