# Fluid Mechanics - Mechanical Engineering (MCQ) questions and answers

Dear Readers, Welcome to Fluid Mechanics multiple choice questions and answers with explanation. These objective type Fluid Mechanics questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma.

Specially developed for the Mechanical Engineering freshers and professionals, these model questions are asked in the online technical test and interview of many companies.

These tutorial are also important for your viva in university exams like Anna university, Pune, VTU, UPTU, CUSAT etc.

1)   According to Archimede's principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.
- Published on 05 Aug 15

a. equal to
b. less than
c. more than
d. unpredictable
 Answer  Explanation  Related Ques ANSWER: equal to Explanation: No explanation is available for this question!

2)   What is the correct formula for absolute pressure?
- Published on 05 Aug 15

a. Pabs = Patm – Pgauge
b. Pabs = Pvacuum – Patm
c. Pabs = Pvacuum + Patm
d. Pabs = Patm+ Pgauge
 Answer  Explanation  Related Ques ANSWER: Pabs = Patm+ Pgauge Explanation: No explanation is available for this question!

3)   One litre of a certain fluid weighs 8N. What is its specific volume?
- Published on 05 Aug 15

a. 2.03 x 10– 3 m3/kg
b. 20.3 x 10– 3 m3/kg
c. 12.3 x 10– 3 m3/kg
d. 1.23 x 10– 3 m3/kg
 Answer  Explanation  Related Ques ANSWER: 1.23 x 10– 3 m3/kg Explanation: No explanation is available for this question!

4)   When is a liquid said to be not in a boiling or vaporized state?
- Published on 05 Aug 15

a. If the pressure on liquid is equal to its vapour pressure
b. If the pressure on liquid is less than its vapour pressure
c. If the pressure on liquid is more than its vapour pressure
d. Unpredictable
 Answer  Explanation  Related Ques ANSWER: If the pressure on liquid is more than its vapour pressure Explanation: No explanation is available for this question!

5)   Bulk modulus is the ratio of
- Published on 05 Aug 15

a. shear stress to volumetric strain
b. volumetric strain to shear stress
c. compressive stress to volumetric strain
d. volumetric strain to compressive stress
 Answer  Explanation  Related Ques ANSWER: compressive stress to volumetric strain Explanation: No explanation is available for this question!

6)   Which type of body is an airfoil?
- Published on 05 Aug 15

a. streamline body
b. wave body
c. bluff body
d. induced body
 Answer  Explanation  Related Ques ANSWER: streamline body Explanation: No explanation is available for this question!

7)   The body whose surface does not coincide with the streamline when places in a flow is called as
- Published on 05 Aug 15

a. streamline body
b. wave body
c. bluff body
d. induced body
 Answer  Explanation  Related Ques ANSWER: bluff body Explanation: No explanation is available for this question!

8)   The sum of components of shear forces in the direction of flow of fluid is called as
- Published on 05 Aug 15

a. shear drag
b. friction drag
c. skin drag
d. all of the above
 Answer  Explanation  Related Ques ANSWER: all of the above Explanation: No explanation is available for this question!

9)   The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as
- Published on 05 Aug 15

a. lift
b. drag
c. both a. and b.
d. none of the above
 Answer  Explanation  Related Ques ANSWER: drag Explanation: No explanation is available for this question!

10)   Boundary layer thickness is the distance from the boundary to the point where velocity of the fluid is
- Published on 05 Aug 15

a. equal to 10% of free stream velocity
b. equal to 50% of free stream velocity
c. equal to 90% of free stream velocity
d. equal to 99% of free stream velocity
 Answer  Explanation  Related Ques ANSWER: equal to 99% of free stream velocity Explanation: No explanation is available for this question!

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