Fluid mechanics MCQ-03

Q.1 The flow whose stream line may be re - presented by straight lines is called which type of flow ?

A. Uni directional flow

B. Two dimensional flow 

C. One dimensional flow

D. One directional flow 

Ans-: C

Q.2 Reynold's number for laminar flow is __.

A. 2000

B. More than 2000

C. Less than 2000

D. 1000

Ans-: C

Q.3 Reynold's number for turbulent flow is ______.

A. More than 10000

B. More than 4000

C. Less than 4000

D. 4000 

Ans-: B

Q.4 The transition from laminar to turbulent flow in a pipe depends on velocity , pipe diameter and kinematic viscosity of the fluid is known as which law?

A. Buoyancy law

B. Reynolds law

C. Avegadro law

D. Bernoulli law

Ans-: B

Q.5 The flow of liquid whoes stream line may be represented by the curve is called __.

A. Two dimensional flow 

B. Three dimensional flow

C. Two directional flow 

D. None of these 

Ans-: B

Q.6 laminar flow is also known as ____.

A. Uniform flow 

B. Steady flow 

C. Stream line flow 

D. Simple flow 

Ans-: C

Q.7 In laminar flow ____.

A. Liquid particles cross each other 

B. Liquid particles do not cross each other 

C. Liquid particles have constant velocity 

D. All of the above 

Ans-: B

Q.8 Dimensions of surface tension are ____.

A. M^1 L^0 T ^-2

B. M^2 L^1 T ^-1

C. M^1 L ^2 T^-2

D. M^-1 L ^2 T^2

Ans -: A

Q.9 Due to the property of _____ falling drop of water become sphere .

A. Adhesion 

B. Surface tension 

C. Cohesion

D. Temperature 

Ans-: B

Q.10 _____ is used in manometers because it provide longer column due to low density.

A. Methanol 

B. Mercury 

C. Water

D. Alcohol 

Ans -: D

Q.11 stoke is the unit of _____.

A. Viscosity 

B. Kinematic viscosity 

C. Specific viscosity 

D. Velocity if fluid 

Ans-: B

Q.12 The buoyancy force is depend on the __.

A. Viscosity of fluid 

B. Mass of liquid displaced 

C. Force of body

D. Pressure of water 

Ans-: B

Q.13 The speed of sound in a ideal gas varies directly as its ____.

A. Temperature 

B. Absolute temperature  

C. Pressure 

D. Density of gas

Ans-: B

Q.14 what is the average value of coefficient of the discharge?

A. 0.52

B. 0.62

C. 0.72

D. 0.27

Ans-: B

Q.15 whatis the average value of coefficient of the velocity?

A. 0.79

B. 0.97

C. 0.59

D. 0.12

Ans-: B