With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss_______________?

Related Mcqs:

1. With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?

   A. Increases B. Decreases C. Remains unchanged D. Increases exponentially...

2. For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)?

   A. Increase B. Decrease C. Remain constant D. Either A. or B.; depends on other factors...

3. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________?

   A. Δp B. 2Δp C. Δp2 D. Δp/2...

4. Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter ‘d’ ?

   A. d B. 0.5 d C. 2d D. 4d...

5. What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘Δp’ with average velocity ‘Vavg’ ?

   A. D Δp/8L B. D Δp/4L C. 8 Vavg/D D. 4 Vavg/D...

6. What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?

   A. 0.64 B. 1.65 C. 0.32 D. 0.94...

7. The fluid jet discharging from a 2″ diameter orifice has a diameter of 1.75″ at its venacontracta. The co-efficient of contraction is___________________?

   A. 1.3 B. 0.766 C. 0.87 D. None of these...

8. For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?

   A. μ B. 1/μ C. √μ D. 1/√μ...

9. 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...

10. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?

    A. 0.5 B. 0.67 C. 1 D. 2...