Fluid Mechanics and Hydraulic Machines (3141906) MCQs

MCQs of Dimensional Analysis and Similarities

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1.
Which of the following statements are true for dimensional analysis?
(a) The functional relationship between dependent and non-dependent variables can be expressed into dimensionless terms by dimensional analysis.
(b) It is used to change the theoretical equation into a dimensionless form.
(c) It helps to convert the units of quantities from one system to another system.
(d) All of the above.
Answer:

Option (d)

2.
The unit of a physical quantity which does not depend on the unit of any other physical quantity is called
(a) independent dimension
(b) fundamental dimension
(c) core dimension
(d) all of the above
Answer:

Option (b)

3.
Which of the following is not a primary quantity?
(a) Mass
(b) Temperature
(c) Time
(d) None of the above
Answer:

Option (d)

4.
Dimensional analysis is useful in
(a) checking the correctness of a physical equation
(b) determining the number of variables involved in a particular phenomenon
(c) determining the dimensionless groups from the given variables
(d) the exact formulation of a physical phenomenon
Answer:

Option (c)

5.
What are the dimensions of force?
(a) M1L1T-2
(b) M1L1T-1
(c) M1L2T-2
(d) M1L2T2
Answer:

Option (a)

6.
Which of the following quantities has the dimensions M0L0T0?
(a) Density
(b) Stress
(c) Strain
(d) Strain Rate
Answer:

Option (c)

7.
M1L-1T-2 is the dimensional formula of
(a) force
(b) coefficient of friction
(c) modulus of elasticity
(d) energy
Answer:

Option (c)

8.
The dimensional formula of the coefficient of viscosity is
(a) M1L1T-1
(b) M-1L2T-2
(c) M1L-1T-1
(d) none of these
Answer:

Option (c)

9.
The dimensions of surface tension are
(a) M1L1T-2
(b) M1T-2
(c) M1L2T-2
(d) M1L1T-1
Answer:

Option (b)

10.
The dimensional formula of Relative density is
(a) M1L-3
(b) M1L1T-1
(c) M1L1T-2
(d) dimensionless
Answer:

Option (d)

Showing 1 to 10 out of 31 Questions
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