Fluid mechanics MCQ-02

Q.1  At 0° C surface tension of water is ___.

A. 47.16 dyn/cm

B. 71.31 dyn/cm 

C. 74.16dyn/cm

D. 60.71dyn/cm

Ans-: C

Q.2 The force per unit area exerted by water on the sides and bottom of it's container is called ?

A. Total pressure 

B. Water pressure 

C. Water force 

D. None of these 

Ans-: B

Q.3 In a closed system, water vaporises rapidly in regions where the pressure drops below the vapour pressure. This phe -nomenon is known as _______.

A. Cavitation 

B. Conservation

C. Vaporization 

D. All of the above 

Ans-: A

Q.4 which of the following is dimensionless?

A. Specific speed 

B. Specific volume 

C. Specific gravity 

D. Specific weight 

Ans-: C

Q.5 For water at 0° C value of mass density in kg sec^2 / m^4 is ____.

A. 1

B. 10

C. 100

D. 1000

Ans-: C

Q.6 Absolute pressure is equal to atmospheric pressure and ____ pressure. 

A. Gauge pressure 

B. Surrounding pressure 

C. Vacuum pressure 

D. None of these 

Ans-: A

Q.7 in which flow ,the velocitiesof liquid particles at all section of the pipe and channel are equal?

A. Constant flow

B. Uniform flow

C. Linear flow

D. Nin- uniform flow

Ans-: B

Q.8 The instantaneous position of all liquid particles which have passed through a given point is called ______.

A. Streak line

B. Non - streak line

C. Straight line 

D. None of these 

Ans-: A

Q.9 which device is used for measuring the rate of flow of liquid through a small channel. 

A. Notch

B. Venturimeter

C. Thermometer 

D. All of the above 

Ans-: A

Q.10 The flow in which the quantity of liquid flowing per second is constant is called ____.

A. Turbulent flow

B. Steady flow

C. Uniform flow 

D. Laminar flow 

Ans-: B

Q.11 In which law path of individual particles of liquid do not cross the each other is called ?

A. Stream line flow

B. Laminar flow 

C. Un-steady flow

D. A+B

Ans-: D

Q.12 The density of water is 1000 kg/m^3 at which temperature?

A. 0° C 

B. 4 ° C

C. 0 ° K

D. 237.16 K 

Ans-: B

Q.13 What us the unit of surface tension?

A. Newton / m^2

B. Newton/ m

C. Newton/ m^2

D. Newton m

Ans-: B

Q.14 For which flow , general energy equation holds ?

A. Steady flow 

B. Turbulent flow 

C. Non- uniform flow 

D. All of the above 

Ans-: C

Q.15 pitot tube us used for measurement of _______.

A. Pressure 

B. Temperature 

C. Velocity 

D. Viscosity 

Ans-: C