Fluid mechanics MCQ -01

Q.1 Viscosity is the property of _____.

A. Solid 

B. Liquid 

C. Gas 

D. Substance 

Ans-: B

Q.2The ratio of absolute or dynamic viscosity and the density is known as ___.

A. Viscosity ratio 

B. Kinematic Viscosity 

C. Absolute viscosity 

D. All of the above 

Ans -: B

Q.3 The law which satate that shear stress is proportional to du/ dx is called _____.

A. Newton's law

B. Fluid law

C. Avogadro's law 

D. NOT

Ans -: A

Q.4 what is expressed as force (F)  per unit length ?

A. Surface tension 

B. Force 

C. Adhesion 

D. Cohesion 

Ans-: A

Q.5 What is the meaning of capillarity of the water ?

A. The phenomenon of rising water in a tube of small diameter dipped in water.

B. The phenomenon of falling  water in a tube of small diameter dipped in water. 

C. The phenomenon of rising water in a tube of large diameter dipped in water. 

D. None of these 

Ans -: A

Q.6 The intensity of pressure at any point in a fluid at rest, is the same in all direction.

A. Pascal law

B. Charles law

C. Newton law

D. Boyle's law 

Ans -: A

Q.7 Gauge pressure is measured with re - ference to ______.

A. Atmospheric pressure 

B. Absolute pressure 

C. At zero temperature 

D. None of these 

Ans-: A

Q.8 Local atmospheric pressure is measured by which instrument ?

A. Thermometer 

B. Mercury barometer 

C. Aneroid barometer 

D. B + C 

Ans -: D

Q.9 Density of water is maximum at ____.

A. 0 ° C

B. 4 ° C

C. 0 ° K

D. 100 ° C

Ans-: B

Q.10 Property of fluid by which it's own molecular are attracted is called ____.

A. Viscosity 

B. Adhesion 

C. Cohesion 

D. Surface tension 

Ans-: C

Q.11 Fluid is a substance which offers no re - sistance to change of ___.

A. Shape 

B. Pressure 

C. Temperature 

D. Volume 

Ans -: A

Q.12 In-viscous and incompressible fluids is known as ______.

A. Real fluid 

B. Ideal fluid 

C. Viscous fluid 

D. Pure fluid 

Ans-: B

Q.13 Liquid are not affected by change in pressure and temperature.

A. Yes 

B. No

C. At 0° C

D. None of these 

Ans -: B

Q.14 Units of mass density is ?

A. Kg sec / m^4 

B. Kg / m^3

C. Kg / km

D. Kg sec ^2 / m ^4

Ans -: D

Q.15 why , mercury  does not wet the glass?

A. Because of viscosity 

B. Because of cohesion

C. Because of adhesion

D. Because of surface tension 

Ans-: B