Q. The Prandtl number will be lowest for

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Q. The dimensionless parameter l³ p² β g d t/µ² is referred to as

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Q. Heat is loss from a 100 mm diameter steam pipe placed horizontally in ambient air at 30 degree Celsius. If the Nusselt number is 25 W/m² K and thermal conductivity of the air is 0.03 W/m K, then heat transfer coefficient will be

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Q. Ratio of inertia force to viscous force is known as

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Q. The ratio of heat flow rate by convection to flow rate by conduction is known as

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Q. The ratio of heat capacity of fluid flowing through the pipe per unit of length to the conductivity of pipe material is known as

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Q. Identify the correct statement

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Q. What is the value of Prandtl number for highly viscous oils?

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Q. What is the value of Prandtl number for liquid metals?

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Q. The product of buoyant force and inertia force to the square of the viscous force is known as

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Q. The ratio of heat transfer coefficient to the flow of heat per unit temperature rise due to the velocity of the fluid is known as

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Q. Which number indicates the relative ability of the fluid to diffuse momentum and internal energy by molecular mechanisms?

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Q. Which number establishes the relation between convective film coefficient, thermal conductivity of the fluid and a significant length parameter?

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