Differential manometer measures the___________________?

Related Mcqs:

1. A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be _______________ cms?

   A. 17
   B. 42
   C. 84
   D. 1.8

2. Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?

   A. H
   B. 12.6 H
   C. 13.6 H
   D. 14.6 H

3. Differential manometer measures the____________________?

   A. Atmospheric pressure
   B. Sub-atmospheric pressure
   C. Pressure difference between two points
   D. None of these

4. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?

   A. Small differential
   B. Atmospheric
   C. Absolute
   D. Gage

5. A Venturimeter measures the___________________?

   A. Velocity head
   B. Pressure
   C. Point velocity
   D. None of these

6. A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is___________________?

   A. 5
   B. 14.1
   C. 56.22
   D. 28.2

7. Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is _____________ mm?

   A. 4
   C. > 12.5
   D. < 10

8. Very small pressure difference (< 5 mm water column) can be most conveniently measured by a/an _____________ manometer?

   A. U-tube water
   B. U-tube mercury
   C. Inclined tube mercury
   D. Inclined tube water

9. Two liquids manometer is used for measuring small pressure differences in___________________?

   A. Liquids
   B. Gases
   C. Mixture of hydrocarbons
   D. None of these

10. For the manometer set up shown in the figure, the pressure difference PA – PB is given by_________________?

    A. (ρH – ρair)gH
    B. (ρH – ρL)gH
    C. (ρH – ρL) gH + (ρL – ρair) . g(L – H)
    D. (ρH – ρL) gL + (ρL – ρair)gH