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

View solution

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

View solution

Q. The Prandtl number will be lowest for

View solution

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

View solution

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

View solution

Q. Free convection heat flow does not depends on

View solution

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

View solution

Q. The value of Prandtl number for air is about

View solution

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

View solution

Q. A similarity in thermal quantities is achieved when

View solution

Q. The similarity of shape and form is known as

View solution

Q. The similarity of motion is known as

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Which term refers to the theory and art of predicting prototype conditions from model observations?

View solution

Q. Which is a full size structure employed in the actual engineering design?

View solution

Q. S.I unit of dynamic viscosity is

View solution