The instrument suitable for measurement of small pressure differences in liquid is (1) U-tube differential manometer (2) Two piezometer manometer (3) Diaphragm pressure gauge (4) Inverted U — Tube manometer?

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Instrument for Measurement of Small Pressure Differences in Liquid

There are different types of instruments available to measure pressure in liquids. However, when it comes to measuring small pressure differences in liquid, the following instruments are commonly used:

U-tube differential manometer: This instrument is suitable for measuring small pressure differences in liquids. It consists of a U-shaped tube, one end of which is connected to the pressure source and the other end is open to the atmosphere. The difference in the levels of liquid in the two limbs of the U-tube indicates the pressure difference. It is a simple and accurate instrument.

Two piezometer manometer: This instrument is also suitable for measuring small pressure differences in liquids. It consists of two tubes, each connected to the pressure source and filled with liquid. The difference in the levels of liquid in the two tubes indicates the pressure difference. It is simple and accurate but requires a larger amount of liquid to fill the tubes.

Diaphragm pressure gauge: This instrument is used to measure small pressure differences in liquids and gases. It consists of a diaphragm that deflects due to the pressure difference and a gauge that reads the deflection. It is accurate and easy to use but is not suitable for high-pressure applications.

Inverted U-tube manometer: This instrument is also suitable for measuring small pressure differences in liquids. It consists of a U-shaped tube, one end of which is connected to the pressure source and the other end is open to the atmosphere. The tube is then inverted so that the two limbs are pointing upwards. The difference in the levels of liquid in the two limbs indicates the pressure difference. It is simple and accurate but requires careful handling to avoid air bubbles in the tube.

Therefore, all of the above instruments can be used to measure small pressure differences in liquids. The choice of instrument depends on the specific requirements of the application, such as accuracy, ease of use, and cost.

Similar Civil Engineering (CE) Doubts

An oil of specific gravity 0.8 is flowing through a venturi meter. The oil-mercury differential manometer shows a reading of 30 cm. What is the difference of pressure head? Take specific gravity of mercury as 13.6. 1. 2.5 mofoil 2. 4.8 mofoil 3. 3.8 mofoil 4. 5.1 mofoil?

Which of the following statements regarding manometers is incorrect?

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