Which of the following produces maximum pressure difference for transportation of gases ?

Related Mcqs:

1. 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

2. The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which “sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis”. The centre of pressure of a rectangular surface (of width ‘w’) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?

   A. 1/(y/3)
   B. 2y/3
   C. 1/(y/4)
   D. 3y/4

3. Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump?

   A. Reciprocating
   B. Plunger
   C. Electromagnetic
   D. Gear

4. In a/an _____________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure?

   A. Rotameter
   B. Pitot tube
   C. Venturimeter
   D. Flow nozzle

5. 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

6. 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

7. Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss ?

   A. Flow nozzle
   B. Venturimeter
   C. Rotameter
   D. Orificemeter

8. Which of the following valves will incur maximum pressure drop for the same discharge of water ?

   A. Globe valve
   B. Gate valve
   C. Needle valve
   D. Butterfly valve

9. In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?

   A. Flow of liquid upward in a vertical pipe
   B. Flow through a converging section
   C. Flow of air downward in a pipe
   D. Impossible in a constant cross-section conduit

10. The maximum delivery pressure of compressors can be upto _____________ atmospheres?

    A. 10
    B. 100
    C. 250
    D. 1000