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MCQs 1: Which of the following statements are true for dimensional analysis? 1. The functional relationship between dependent and non-dependent variables can be expressed into dimensionless terms by dimensional analysis 2. In model testing, it reduces the number of variables into three numbers 3. It is used to change the theoretical equation into dimensionless form 4. It helps to convert the units of quantities from one system to another system

(1), (2) and (3) (2), (3) and (4) (1), (3) and (4) (1), (2), (3) and (4)
Answer Explanation

MCQs 2: The unit of physical quantity which does not depend on the unit of any other physical quantity is called as

independent dimension fundamental dimension core dimension none of the above
Answer Explanation

MCQs 3: Which of the following is not a primary quantity?

Mass (M) Temperature (θ) Time (T) None of the above
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MCQs 4: How is the intensity of shear stresses over the boundary layer?

small large sometimes small and sometimes large cannot say
Answer Explanation

MCQs 5: The velocity gradients over the boundary layer are

small large sometimes small and sometimes large cannot say
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MCQs 6: What is the effect of free stream velocity on thickness of boundary layer?

Increase in free stream velocity increases the boundary layer thickness Increase in free stream velocity decreases the boundary layer thickness The boundary layer thickness does not get affected by any change in free stream velocity unpredictable
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MCQs 7: If viscosity of fluid is more, the thickness of boundary layer is

more less not affected by change in viscosity unpredictable
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MCQs 8: The region in the turbulent boundary layer zone, adjacent to the solid surface of the plate is called as

laminar sub layer turbulent sub layer solid sub layer solid layer
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MCQs 9: Newton's law of viscosity states that

the shear stress applied to the fluid is directly proportional to the velocity gradient (du/dy) the shear stress applied to the fluid is inversely proportional to the velocity gradient (du/dy) the shear stress applied to the fluid is directly proportional to the specific weight of the fluid the shear stress applied to the fluid is inversely proportional to the specific weight of the fluid
Answer Explanation

MCQs 10: What is an ideal fluid?

A fluid which has no viscosity A fluid which is incompressible A fluid which has no surface tension All of the above
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MCQs 11: The fluid will rise in capillary when the capillary is placed in fluid, if

the adhesion force between molecules of fluid and tube is less than the cohesion between liquid molecules the adhesion force between molecules of fluid and tube is more than the cohesion between liquid molecules the adhesion force between molecules of fluid and tube is equal to the cohesion between liquid molecules cannot say
Answer Explanation

MCQs 12: When the angle between surface tension with the liquid (θ) is greater than 90o, the liquid becomes

flat concave upward convex upward unpredictable
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MCQs 13: If stream function (Ψ) satisfies the Laplace equation, it is a possible case of

a circular flow a rotational flow an irrotational flow none of the above
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MCQs 14: Which acceleration has a nonzero value in uniform flow?

Local acceleration Convective acceleration Both local as well as convective acceleration unpredictable
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MCQs 15: Viscous forces are not present in

rotational flow irrotational flow laminar flow none of the above
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MCQs 16: The component of acceleration due to change in the direction of velocity vector is called as

direction acceleration tangential acceleration normal acceleration cannot say
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MCQs 17: Blood circulation through arteries is

a laminar flow a turbulent flow Both A & B None of these
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MCQs 18: Which of the following sentences are true for Bernoulli's equation? 1. Bernoulli's principle is applicable to ideal incompressible fluid 2. The gravity force and pressure forces are only considered in Bernoulli's principle 3. The flow of fluid is rotational for Bernoulli's principle 4. The heat transfer into or out of fluid should be zero to apply Bernoulli's principle

(1), (2) and (3) (1), (3) and (4) (1), (2) and (4) (1), (2), (3) and (4)
Answer Explanation

MCQs 19: Which of the following devices does not use Bernoulli's equation as its working principle?

Venturimeter Orifice-meter Pitot tube None of the above
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MCQs 20: The cylindrical portion of short length, which connects converging and diverging section of venturimeter, is called as

diffuser connector throat manometer tube
Answer Explanation

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