Fluid Dynamics — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#9 A pitot tube is used to measure:
A) fluid velocity
B) pressure difference
C) fluid density
D) temperature
#10 The principle of operation of an airplane wing is based on:
A) Bernoulli’s principle
B) Pascal’s law
C) Archimedes' principle
D) Coulomb's law
#11 Which of the following equations describes the relationship between pressure and depth in a liquid?
A) $P = P_0 + \rho g h$
B) $P = P_0 - \rho g h$
C) $P = \rho g h$
D) $P = P_0 + g h$
#12 In laminar flow, the velocity is:
A) constant across the flow
B) zero at the surface
C) highest at the surface
D) directly proportional to pressure
#13 The Reynolds number is used to predict:
A) whether flow is laminar or turbulent
B) the speed of sound
C) fluid density
D) fluid velocity
#14 Which of the following is true for turbulent flow?
A) The fluid flows in irregular patterns
B) The fluid velocity is constant
C) The flow is smooth
D) Pressure is constant
#15 The volumetric flow rate $Q$ is related to velocity $v$ and area $A$ by:
A) $Q=Av$
B) $Q=\dfrac{v}{A}$
C) $Q=\dfrac{A}{v}$
D) $Q=A/v$
#16 In a steady flow, the velocity of a fluid depends on:
A) the shape and size of the flow path
B) the temperature of the fluid
C) the density of the fluid
D) the pressure at the center of the flow
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