MCQs of Dimensional Analysis and Similitude (Fluid Mechanics & Hydraulics - 3140611)

Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Dimensional Analysis and Similitude

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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

(a)	(1), (2) and (3)
(b)	(2), (3) and (4)
(c)	(1), (3) and (4)
(d)	(1), (2), (3) and (4)

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

(a)	independent dimension
(b)	fundamental dimension
(c)	core dimension
(d)	none of the above

Which of the following is not a primary quantity?

(a)	Mass (M)
(b)	Temperature ( $θ$ )
(c)	Time (T)
(d)	None of the above

What are the dimensions of force?

(a)	$[M L T^{- 2}]$
(b)	$[M L T^{- 1}]$
(c)	$[M L^{2} T^{- 2}]$
(d)	$[M L^{2} T^{2}]$

Which of the following quantity is dimensionless?

(a)	Density
(b)	Stress
(c)	Strain
(d)	Strain Rate

Which of the following is a dimensionless equation?

(a)	Reynold's equation
(b)	Euler's equation
(c)	Weber's equation
(d)	All of the above

Which of the following number is applicable in open hydraulic structure such as spillways, where gravitational force is predominant?

(a)	Reynold's equation
(b)	Euler's equation
(c)	Weber's equation
(d)	Froude's Number

Square root of the ratio of inertia force to elastic force is called as

(a)	Mach's Number
(b)	Cauchy's Number
(c)	Both a. and b.
(d)	None of the above

[M L^{- 1} T^{- 2}]

is the dimensional formula of

(a)	force
(b)	coefficient of friction
(c)	modulus of elasticity
(d)	energy

10.

On the basis of dimensional equation, the maximum number of unknown that can be found, is

(a)	One
(b)	Two
(c)	Three
(d)	Four

Showing 1 to 10 out of 28 Questions