WorksheetsDay 37-Oct 27-worksheet-Btech-FM intro. & fluid properties
Total questions: 15
Worksheet time: 13mins
If temperature of water decreases from 10°C to 4°C, its density will —
(a)
A liquid shows a convex meniscus in a capillary tube. Which dominant force causes this?
(a)
If specific gravity of a fluid is 0.8, density of that fluid is — (ρwater = 1000 kg/m³)
(a)
Capillary rise is inversely proportional to ________
Velocity of fluid
Temperature
Diameter of tube
Specific volume
Surface tension decreases with temperature because —
Density increases
Cohesion between molecules weakens
Adhesion becomes zero
Pressure rises
In cavitation, local pressure in the fluid —
Exceeds atmospheric pressure
Becomes equal to bulk modulus
Falls below vapour pressure
Equals surface tension
Vapour pressure is independent of temperature.
True
False
Surface tension always tries to reduce the surface area of a liquid.
True
False
The reciprocal of compressibility is called (a)
The SI unit of surface tension is (a) .
When liquid starts boiling without external heating, the pressure above it equals (a) pressure.
Kinematic viscosity relates dynamic viscosity to (a)
What is the shear stress on a horizontal plate of area 0.50 m² sliding over a fixed plate with a fluid film 1.5 mm thick, if the top plate moves at 0.25 m/s and the fluid has viscosity 0.48 Pa·s?
(a)
A liquid has specific gravity 0.90 and viscosity 0.12 Pa·s. Take g = 9.81 m/s² and density of water = 1000 kg/m³. What is the density of the liquid?
(a)
In a capillary tube, water rises 36 mm when diameter = 1.0 mm. (a) Find rise for diameter = 0.5 mm.
(a)
