A. 1 × 10-3 to 2 × 10-3 kg/m.s
B. 0.5 × 10-3 to 1 × 10-3 kg/m.s
C. 1 to 2 kg/m.s
D. 0.5 to 1 kg/m.s
Related Mcqs:
- As per Newton’s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to (where, μ = fluid viscosity) ?
A. 1/μ
B. μ
C. μ2
D. 1/μ2 - A gas (density = 1.5 kg/m3, viscosity = 2 × 10‒5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10‒5kg/m.s flowing at 3 m/s will be________________?
A. 8400 Pa/m
B. 12600 Pa/m
C. 18900 Pa/m
D. 16800 Pa/m - The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s) ?
A. 24000
B. 24
C. 0.24
D. 0.44 - In the Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is ______________ the fluid viscosity?
A. Directly proportional to
B. Inversely proportional to
C. Inversely proportional to the square root of
D. Independent of - Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?
A. Increase
B. Decrease
C. Remain same
D. Data insufficient to predict pressure drop - A lubricant 100 times more viscous than water would have a viscosity (in Pa.s) ?
A. 0.01
B. 0.1
C. 1
D. 10 - Viscosity of water is about _____________ times that of air at room temperature?
A. 15
B. 55
C. 155
D. 1050 - A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ?
A. 10 m
B. 11 m
C. 11.8 m
D. 30 m - Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the___________________?
A. Pipe length
B. Fluid velocity in the pipe
C. Time taken to close the valve
D. All A., B. and C. - What is the unit of kinematic viscosity in SI unit ?
A. M2/sec
B. N/m2. sec
C. Kg. sec/m
D. None of these
