Question

Match the following measuring instruments with the appropriate figures: I – Pitot probe II – Pitot-static probe III – Piezometer

Figures: (P), (Q), (R)

• A. I – P;\ \ II – Q;\ \ III – R
• B. I – R;\ \ II – Q;\ \ III – P
• C. I – R;\ \ II – P;\ \ III – Q
• D. I – Q;\ \ II – P;\ \ III – R

Hint:

Remember: - Piezometer = static pressure only. - Pitot = stagnation pressure only. - Pitot-static = measures both, gives velocity (dynamic pressure).

Answer 1

The Correct Option is B

Step 1: Recall definitions. - Piezometer: A simple vertical tube connected to the fluid, measuring {static pressure only}. - Pitot probe: An open-ended tube facing the flow directly, measuring {stagnation pressure}. - Pitot-static probe: A combination device with a forward-facing opening (stagnation) and small side holes (static), giving the {dynamic pressure} by difference.
Step 2: Match with figures. - Figure (P): Vertical tube connected at the side, measures static pressure only $\Rightarrow$ Piezometer (III). - Figure (Q): Has both forward-facing tube and side opening arrangement $\Rightarrow$ Pitot-static probe (II). - Figure (R): Forward-facing tube only, measures stagnation pressure $\Rightarrow$ Pitot probe (I).
Step 3: Assemble matching. \[ \text{I – R; II – Q; III – P.} \] Final Answer:\fbox{(B) I – R;\ II – Q;\ III – P}