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GATE 2019: Fluid Mechanics Quiz 1
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Question 1
Calculate the capillary effects (in mm) in a glass tube of 4 mm diameter, when immersed in mercury. The temperature of the liquid is 20 °C and the values of surface tension of water and mercury at 20 °C in contact with air are 0.0735 N/m and 0.48 N/m respectively. The contact angle for mercury is 130°.
Question 2
1 poiseuille (Pl) is equal to
Question 3
An increase in pressure of a liquid from 7.5MPa to 15MPa results into 0.2% decrease in its volume. Determine the coefficient of compressibility of the liquid.
Question 4
Newton’s law of viscosity states that ______
Question 5
Match List-I (Type of fluid with List-II (Variation of shear stress) and select the correct answer:
Question 6
Consider fluid flow between two infinite horizontal plates which are parallel (the gap between them being 50 mm). The top plate is sliding parallel to the stationary bottom plate at a speed of 3 m/s. The flow between the plates is solely due to the motion of the top plate. The force per unit area (magnitude) required to maintain the bottom plate stationary is _________N/m2.
Viscosity of the fluid μ = 0.44 kg/m-s and density ρ = 888 kg/m3.
Viscosity of the fluid μ = 0.44 kg/m-s and density ρ = 888 kg/m3.
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Dec 9ESE & GATE ME
