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WorksheetsProperties of Fluid
Total questions: 20
Worksheet time: 16mins
Ratio of the weight density of a liquid to weight density of standard fluid is
Equal to the Ratio of the mass density of a liquid to mass density of standard fluid
more than from the Ratio of the mass density of a liquid to mass density of standard fluid
Less than from the Ratio of the mass density of a liquid to mass density of standard fluid
Equal to 1 always
1 stokes =____________________ secm2
10−6
10
10−4
1
1 poise =____________________ m2N.sec
10
0.1
10−4
1
1 atmospheric pressure =____________________
1000 mm of Hg
10.3 m of water
1.01325 m2N
1013.25 Kpa
The specific gravity of a liquid has
the same unit as that of mass density
the same unit as that of weight density
the same unit as that of specific volume
no unit
A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific weight of the liquid will be
6.5m3kN
6:5 kN / m
1.3m3kN
None of these
If 200m^3 of fluid has a weight of 1060N measured on the planet having acceleration due to gravity 6.625m/s^2, what will be it’s specific volume?
0.8
0.7
0.6
0.5
What is the correct formula for absolute pressure?
Pabs = Patm – Pgauge
Pabs = Pvacuum – Patm
Pabs = Patm+ Pgauge
Pabs = Pvacuum + Patm
Bulk modulus is the ratio of
shear stress to volumetric strain
volumetric strain to shear stress
volumetric strain to compressive stress
compressive stress to volumetric strain
Shear stress in static fluid is
always zero
always maximum
between zero to maximum
unpredictable
The shear stress at a point in a liquid is found to be 0.03 N/m^2. The velocity gradient at the point is 0.15 s-1. What will be it’s viscosity (in Poise)?
20
2
0.2
0.5
Which of the following is a unit of kinematic viscosity?
Stokes
Pa-s
m^2/s
Poise
Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature?
Viscosity increases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas
Viscosity increases with the increase in temperature of a liquid and increases with the increase in temperature of a gas
Viscosity decreases with the increase in temperature of a liquid and decreases with the increase in temperature of a gas
Viscosity decreases with the increase in temperature of a liquid and increases with the increase in temperature of a gas
The viscosity of a fluid in motion is 1 Poise. What will be it’s viscosity (in Poise) when the fluid is at rest?
0
0.5
1
2
The viscosity of a fluid in motion is 1 Poise. What will be it’s shear stress when the fluid is at rest?
0
0.5
1
2
Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity V. What will be the velocity of the fluid in contact with the upper plate?
V
V/2
2V
0
Two horizontal plates placed 250mm have an oil of viscosity 20 poises. Calculate the shear stress in oil if upper plate is moved with velocity of 1250mm/s.
20 N/m^2
2 N/m^2
10 N/m^2
20 N/m
Find the kinematic viscosity of oil having density 1962 kg/m^3. the force experienced for area of 20 m^2 is 4.904 kN and velocity of gradient at that point is 0.2/s.
0.625
1.25
2.5
None of these
The velocity distribution for fluid flow over a flat plate is given by u=2y-6y^2 in which u is the velocity in metre per second at a distance of y metre above the plate. Determine the shear stress at y=0.15 m.Take dynamic viscosity of fluid as 8.6 poise.
0.172 Pa.
0.344 Pa.
0.086 Pa.
1.72 Pa
In which types of fluids it is observed that momentum transfer dominates cohesive forces with increase in temperature and hence viscosity increases
Gas
liquid
solid
all of the above
