

Hydraulics - Engineering
Q1: A rise or fall of liquid in a glass tube of a very small diameter when dipped isA
directly proportional to the force per unit length of periphery
B
direcly proportional to the sine of the angle of contact
C
directly proportional to the specific weight of liquid
D
inversely proportional to the diameter of the glass tube.
ANS:C - directly proportional to the specific weight of liquid The capillary rise or fall of a liquid in a glass tube is directly proportional to the specific weight of the liquid. Specific weight, also known as unit weight, is defined as the weight per unit volume of a substance. It is directly related to the density of the substance and the acceleration due to gravity. When a glass tube is dipped into a liquid, the rise or fall of the liquid within the tube occurs due to the balance between cohesive forces within the liquid and adhesive forces between the liquid and the solid surface of the tube. This phenomenon is known as capillarity. The capillary rise or fall height ℎh is given by the equation: ℎ = 2γcosθ / ρgr where:
|


For help Students Orientation
Mcqs Questions
One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.