Q. The results obtained from experiments on models can be applied to prototype only if a complete similarity exists between the model and prototype and for that the two systems may be

(i) Geometrically similar
(ii) Kinematically similar
(iii) Dynamically similar

Identify the correct statements

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Q. Geometrically similarity prescribes that the ratio of the corresponding linear dimensions of the two systems are

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Q. Thermal similarity refers to the comparison of two systems made on the basis of their

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Q. The comparison of two systems made on the basic of their temperature, specific heat and heat flus is known as

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Q. The similarity of masses and forces of the corresponding particles of flow is known as

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Q. The similarity of motion is known as

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Q. The similarity of shape and form is known as

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Q. A similarity in thermal quantities is achieved when

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Q. Ratio of actual velocity to sonic velocity is known as

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Q. The value of Prandtl number for air is about

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Q. Let us say Mach number (greater than one), the flow is

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Q. Free convection heat flow does not depends on

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Q. Which dimensionless number has a significant role in forced convection?

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Q. The non-dimensional parameter known as Stanton number is used in

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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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