Fluid Mechanics Questions and Answers – Dimensional Homogenity

This set of Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on “Dimensional Homogenity”.

1. Which among the following is not a fundamental dimension?
a) [L]
b) [M]
c) [T]
d) [kg]
View Answer

Answer: d
Explanation: It is essential to adopt a consistent dimensional quantity. Thus, we adopt a basic form to categorize dimension quantities. For this purpose, we adopt a comparison of the quantities in SI or MKS units.

2. The fundamental dimensional quantities are related by________
a) Avagadaro’s law
b) Newton’s second law
c) Newtons first law
d) Newton’s third law
View Answer

Answer: b
Explanation: Newton’s 2nd law is the most suitable one for determining the dimensional quantities. We know that, F=ma. Where F = Force , m = mass in kg, and a= acceleration in m/s2.

3. Force can be written as______
a) [M][L][T]-2
b) [M][L][T]2
c) [M][L][T]
d) [M][L][T]3
View Answer

Answer: a
Explanation: Force can be written dimensionally by [F]= [M][L][T]-2. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L][T]-2.
advertisement
advertisement

4. How can we write power using the MLT system?
a) [M][L][T]-2
b) [M][L]2[T]3
c) [M][L][T]
d) [M][L][T]3
View Answer

Answer: b
Explanation: Power can be written dimensionally by [M][L]2[T]3. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L]2[T]3.

5. How can we write dynamic viscosity using the MLT system?
a) [M][L][T]-2
b) [M][L]2[T]3
c) [M][L]-1[T]-1
d) [M][L][T]3
View Answer

Answer: c
Explanation: Dynamic viscosity can be written dimensionally by [M][L]-1[T]-1. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L]-1[T]-1.
Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

6. How can we write kinematic viscosity using the MLT system?
a) [M][L][T]-2
b) [M]0[L]2[T]-1
c) [M][L]-1[T]-1
d) [M][L][T]3
View Answer

Answer: b
Explanation: Kinematic viscosity can be written dimensionally by [M]0[L]2[T]-1. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M]0[L]2[T]-1.

7. How can we write momentum using the MLT system?
a) [M][L][T]-2
b) [M]0[L]2[T]-1
c) [M][L][T]-1
d) [M][L][T]3
View Answer

Answer: c
Explanation: Momentum can be written dimensionally by [M][L][T]-1. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L][T]-1.
advertisement

8. How can we write specific weight using the FLT system?
a) [F]
b) [F][T]
c) [F][L][T]
d) [L]
View Answer

Answer: a
Explanation: Specific can be written dimensionally by [F]. This is by adopting the basic SI or MKS units (FLT system). Where, [F] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [F].

9. How can we write specific mass using the MLT system?
a) [M][L][T]-2
b) [M]0[L]2[T]-1
c) [M][L]-3[T]0
d) [M][L][T]3
View Answer

Answer: c
Explanation: Specific mass can be written dimensionally by [M][L]-3[T]0. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L]-3[T]0.
advertisement

10. How can we write energy using the MLT system?
a) [M][L]2[T]2
b) [M]0[L]2[T]-1
c) [M][L]-3[T]0
d) [M][L][T]3
View Answer

Answer: a
Explanation: Energy or work can be written dimensionally by [M][L]2[T]2. This is by adopting the basic SI or MKS units. Where, [M] is the mass, [L] is the length and [T] is the time. Thus, the correct option is [M][L]2[T]2.

Sanfoundry Global Education & Learning Series – Fluid Mechanics.

To practice all areas of Fluid Mechanics, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.