# Properties of Fluids - Mechanical Engineering (MCQ) questions and answers

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.

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

2)   The specific weight of the fluid depends upon

a. gravitational acceleration
b. mass density of the fluid
c. both a. and b.
d. none of the above
 Answer  Explanation ANSWER: both a. and b. Explanation: No explanation is available for this question!

3)   One litre of a certain fluid weighs 8N. What is its specific volume?

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 ANSWER: 1.23 x 10– 3 m3/kg Explanation: No explanation is available for this question!

4)   What is the correct formula for absolute pressure?

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

5)   When is a liquid said to be not in a boiling or vaporized state?

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 ANSWER: If the pressure on liquid is more than its vapour pressure Explanation: No explanation is available for this question!

6)   Bulk modulus is the ratio of

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 ANSWER: compressive stress to volumetric strain Explanation: No explanation is available for this question!

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

a. flat
b. concave upward
c. convex upward
d. unpredictable
 Answer  Explanation ANSWER: convex upward Explanation: No explanation is available for this question!

8)   The fluid will rise in capillary when the capillary is placed in fluid, if

a. the adhesion force between molecules of fluid and tube is less than the cohesion between liquid molecules
b. the adhesion force between molecules of fluid and tube is more than the cohesion between liquid molecules
c. the adhesion force between molecules of fluid and tube is equal to the cohesion between liquid molecules
d. cannot say
 Answer  Explanation ANSWER: the adhesion force between molecules of fluid and tube is more than the cohesion between liquid molecules Explanation: No explanation is available for this question!

9)   The below diagram is a graph of change in shear stress with respect to velocity gradient in a fluid. What is a type of the fluid? a. Newtonian fluid
b. Non-Newtonian fluid
c. Ideal fluid
d. Dilatent fluid
 Answer  Explanation ANSWER: Non-Newtonian fluid Explanation: No explanation is available for this question!

10)   What is an ideal fluid?

a. A fluid which has no viscosity
b. A fluid which is incompressible
c. A fluid which has no surface tension
d. All of the above
 Answer  Explanation ANSWER: All of the above Explanation: No explanation is available for this question!

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