MCQ Questions and Answers on Fluid Mechanics

Q.

The flow of an oil through small diameter (not more than a mm) tube is likely to be

A. Laminar

B. Turbulent

C. Transitional and Turbulent

D. Transitional

Answer : Option:- A

Explanation :

As oil is more viscous also diameter of pipe is very small, thus particle of oil moves only straight direction and parallel therefore the flow of an oil through small diameter tube is likely to be Laminar.

Q.

A fluid having no viscosity is known as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

Discuss

Answer : Option:- B

Explanation :

A fluid having no viscosity is known as Ideal fluid.

Q.

A stagnation point is a point :

A. Where the pressure is zero

B. Where the total energy is zero

C. Where the velocity of flow reduces to zero

D. Where the total energy is maximum

Discuss

Answer : Option:- C

Explanation :

A stagnation point is a point where the velocity of flow reduces to zero.

Q.

A notch is used to measure ______ of liquids.

A. Pressure

B. Discharge

C. Velocity

D. volume

Discuss

Answer : Option:- B

Explanation :

A notch is an opening in the side of a reservoir extending above the free surface. These notches are used to measure discharge of liquids.

Q.

A pitot tube is used to measure the

A. velocity of flow at the required point in a pipe

B. pressure difference between two points in a pipe

C. total pressure of liquid flowing in a pipe

D. discharge through a pipe.

Discuss

Answer : Option:- A

Explanation :

A pitot tube is used to measure the velocity of flow.

Q.

One litre of water occupies a volume of

A. 100 cm3

B. 250 cm3

C. 500 cm3

D. 1000 cm3

Discuss

Answer : Option:- D

Explanation :

1 litre = 1000 cm³.

Q.

In an isothermal atmosphere the pressure

A. Is constant with elevation

B. Decreases linearly with elevation

C. Cannot be related to elevation

D. Decreases near the surface but approaches a constant value

Discuss

Answer : Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

Fluids that require a gradually increasing shear stress to maintain a constant strain rate are known as

A. Rheopectic fluids

B. Thixotropic fluids

C. Pseudoplastic fluids

D. Newtonian fluids

Discuss

Answer : Option:- B

Explanation :

Viscosity of thixotropic fluids decreases with duration of stress, thus to maintain constant rate of shear strain, the fluid requires increasing shear stress.

Q.

A large metacentric height in a vessel

A. Improves stability and makes periodic time to oscillation longer

B. Impairs stability and makes periodic time of oscillation shorter

C. Has no effect on stability or the periodic time of oscillation

D. Improves stability and makes the periodic time of oscillation shorter

Discuss

Answer : Option:- D

Explanation :

Large meta-centric height of floating body ensures stability and shortens the time of oscillation.

Q.

The viscosity of

A. Liquids increases with temperature

B. Gases increases with temperature

C. Fluids decreases with temperature

D. Fluids increases with temperature

Discuss

Answer : Option:- B

Explanation :

The viscosity of gases increases with the increase in temperature, whereas that of liquids decreases with increase in temperature.

MCQ Questions and Answers on Fluid Mechanics

Q. The flow of an oil through small diameter (not more than a mm) tube is likely to be

Q. A fluid having no viscosity is known as

Q. A stagnation point is a point :

Q. A notch is used to measure ______ of liquids.

Q. A pitot tube is used to measure the

Q. One litre of water occupies a volume of

Q. In an isothermal atmosphere the pressure

Q. Fluids that require a gradually increasing shear stress to maintain a constant strain rate are known as

Q. A large metacentric height in a vessel

Q. The viscosity of

Q.

The flow of an oil through small diameter (not more than a mm) tube is likely to be

Q.

A fluid having no viscosity is known as

Q.

A stagnation point is a point :

Q.

A notch is used to measure ______ of liquids.

Q.

A pitot tube is used to measure the

Q.

One litre of water occupies a volume of

Q.

In an isothermal atmosphere the pressure

Q.

Fluids that require a gradually increasing shear stress to maintain a constant strain rate are known as

Q.

A large metacentric height in a vessel

Q.

The viscosity of