Civil Engineering MCQs

2965 MCQs  (Page 253 of 297)

Surface energy per unit area of a surface is numerically equal to ___________________?
A. Atmospheric pressure
B. Surface tension
C. Force of adhesion
D. Force of cohesion
The vapour pressure over the concave surface is__________________?
A. Less MAN the vapour pressure over the plane surface
B. Equal to the vapour pressure over the plane surface
C. Greater than the vapour pressure over the plane surface
D. Zero
The units of dynamic or absolute viscosity are_______________?
A. Metres2 per sec
B. Kg sec/meter
C. Newton-sec per meter
D. Newton-sec2 per meter
The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will_______________?
A. Increase
B. Remain unaffected
C. May increase or decrease depending on the characteristics of liquid
D. Decrease
Capillary action is due to the__________________?
A. Surface tension
B. Cohesion of the liquid
C. Adhesion of the liquid molecules and the molecules on the surface of a solid
D. All of the above