Question

Which of the following instrument is not an air pressure recording instrument?

• A. Aneroid Barometer
• B. Micro-Barograph
• C. Micro-Barovariograph
• D. Pentagraph

Hint:

Remember these meteorological instruments: \[ \boxed{ \begin{aligned} \text{Barometer} &\rightarrow \text{Measures Air Pressure}, \text{Barograph} &\rightarrow \text{Records Air Pressure}, \text{Barovariograph} &\rightarrow \text{Records Pressure Changes}, \text{Pantograph} &\rightarrow \text{Copies or Enlarges Drawings}. \end{aligned} } \] Mnemonic: “Baro = Pressure, Panto = Drawing.”

Answer 1

The Correct Option is D

Concept: Air pressure is measured or recorded using instruments such as the Aneroid Barometer, Barograph, and Barovariograph. A Pentagraph (Pantograph) is a drafting instrument used to enlarge or reduce drawings and has no relation to atmospheric pressure measurement.

Step 1: Examine each instrument. \[ \begin{aligned} A. &\ \text{Aneroid Barometer} \rightarrow \text{Measures atmospheric pressure.} B. &\ \text{Micro-Barograph} \rightarrow \text{Records atmospheric pressure continuously.} C. &\ \text{Micro-Barovariograph} \rightarrow \text{Records pressure variations.} D. &\ \text{Pentagraph} \rightarrow \text{Drawing instrument, not a pressure recorder.} \end{aligned} \]

Step 2: Identify the incorrect instrument. \[ \boxed{\text{Pentagraph}} \] Hence, \[ \boxed{\text{(D)}} \]