Question

Assertion A: Only positive displacement pumps are used in fluid power systems.
Reason R: Positive displacement pumps maintain nearly constant pump flow rate independent of the pressure.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct but R is NOT the correct explanation of A
• C. A is correct but R is not correct
• D. A is not correct but R is correct

Hint:

Positive displacement pumps are used for their ability to generate high pressure.
The constant flow rate is a characteristic, not the reason for their use.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Fluid power systems use pumps to generate flow.
Positive displacement pumps are commonly used.

Step 2: Key Formula or Approach:
No specific formula.
Need to understand the characteristics of positive displacement pumps.

Step 3: Detailed Explanation:
Positive displacement pumps are indeed used in fluid power systems because they provide a constant flow rate regardless of pressure.
This is correct.
The reason given is also correct: positive displacement pumps maintain nearly constant flow rate independent of pressure.
However, the reason is not the explanation for why only positive displacement pumps are used.
The main reason for using positive displacement pumps is that they can generate high pressures and are suitable for hydraulic systems.
Thus, both A and R are correct, but R is not the correct explanation of A.

Step 4: Final Answer:
Both A and R are correct, but R is NOT the correct explanation of A.
Hence, the correct option is (B).