Questions and answers for exam Preparation

MCQs

Total Questions : 3147 | Page 315 of 315 pages

Question 3141. Practical fluids___________________?

are viscous
possess surface tension
are compressible
possess all the above properties
possess none of the above properties

Discuss Question

Answer: Option D. -> possess all the above properties
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3142. Select the correct statement?

Local atmospheric pressure depends upon elevation of locality only
Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
Local atmospheric pressure is always below standard atmospheric pressure
A barometer reads the difference be-tween local and standard atmospheric pressure
Gauge piessure is equal to atmospheric pressure plus instrument reading

Discuss Question

Answer: Option B. -> Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3143. Choose the correct relationship ?

specific gravity = gravity x density
dynamicviscosity = kinematicviscosity x density
gravity = specific gravity x density
kinematicviscosity = dynamicviscosity x density
hydrostaticforce = surface tension x gravity

Discuss Question

Answer: Option B. -> dynamicviscosity = kinematicviscosity x density
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3144. Choose the wrong statement ?

The center of buoyancy is located at the center of gravity of the displaced liquid
For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy
If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions
For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy
All floating bodies are stable

Discuss Question

Answer: Option E. -> All floating bodies are stable
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3145. Choose the wrong statement?

Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
Viscosity is due primarily to interaction between fluid molecules
Viscosity of liquids decreases with in-crease in temperature
Viscosity of liquids is appreciably affected by change in pressure
Viscosity is expressed as poise, stoke, or saybolt seconds

Discuss Question

Answer: Option D. -> Viscosity of liquids is appreciably affected by change in pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3146. Choose the wrong statement ?

any weight, floating or immersed in a liquid, is acted upon by a buoyant force
Buoyant force is equal to the weight of the liquid displaced
The point through which buoyant force acts, is called the center of buoyancy
Center of buoyancy is located above the center of gravity of the displaced liquid v
Relative density of liquids can be determined by means of the depth of flotation of hydrometer

Discuss Question

Answer: Option D. -> Center of buoyancy is located above the center of gravity of the displaced liquid v
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 3147. Choose the wrong statement?

The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface
The horizontal component acts through the center of pressure for the vertical projection
The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area
he vertical component passes through the center of pressure of the volume
Center of pressure acts at a greater depth than center of gravity

Discuss Question

Answer: Option D. -> he vertical component passes through the center of pressure of the volume
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!