FLOW OF FLUIDS
TOP 10 MCQ
1. The formula to calculate liquid pressure is [GPAT-2023 SHIFT-1]
(a) P = mgh
(b) P = wgh
(c) P = ρgh
(d) P = Fg
2. If u is velocity of fluid, ρ is density of fluid, L is length of the pipe, D is diameter of the pipe, f is friction factor and ΔP is
pressure drop, then the equation ΔP = (2 f ρ u² L) / D represents [GPAT-2023 SHIFT-1
(a) Hagen–Poiseuille equation
(b) Bernoulli equation
(c) Fanning’s equation
(d) Reynolds equation
3. Differential manometer has advantage over simple manometer [GPAT-2021]
(a) Handling is simple
(b) It can measure smaller pressure difference
(c) Viscosity can be determined along with pressure difference
(d) It is used when pressure difference is high
4. Which of the following fluid can be considered as an ideal fluid [GPAT-2018]
(a) Viscous fluid
(b) Non-viscous fluid
(c) Compressible fluid
(d) All of these
5. Foaming during liquid filling can be reduced by following ways, EXCEPT [GPAT-2017]
(a) Increase in speed of the filling line
(b) Minimized product turbulence
(c) Closed system filling
(d) Defoaming device
6. The Reynolds number is defined as [GPAT-2016]
(a) Measure of ratio of inertial forces ρv²/L to viscous forces μ/L²
(b) Measure of ratio of inertial forces ρv²/L to non-viscous forces
(c) Measure of the ratio of viscous forces μV/L² to inertial forces ρv²/L
(d) Measure of the ratio of non-viscous forces to inertial forces ρv²/L
7. A large Reynolds number is indication of which type of flow [GPAT-2016]
(a) Smooth and stream line flow
(b) Laminar flow
(c) Steady flow
(d) Highly turbulent flow
8. Pitot tube measures using a manometer [GPAT-2013
(a) Surface area
(b) Liquidity
(c) Velocity head
(d) Pressure head
9. Precise control of flow is obtained by which one of the following [GPAT-2012]
(a) Needle valve
(b) Butterfly valve
(c) Gate valve
(d) Globe valve
10. The Reynolds number widely used to classify flow behaviour of fluid is the ratio of which one of the following [GPAT-2011]
(a) Inertial forces to gravitational forces
(b) Inertial forces to viscous forces
(c) Viscous forces to inertial forces
(d) Viscous forces to gravitational forces
ANSWER KEY
| 1-c | 2-c | 3-b | 4-b | 5-a | 6-a | 7-d | 8-c | 9-a | 10-b |
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