HEAT TRANSFER (MID I)

1a) Write the assumptions of Fourier law.b) Derive the general heat conduction equation for cylindrical coordinate system.

2a) Heat is generated within a wire of 3 mm in diameter by passing a current of 350A. The thermal conductivity and resistivity of the wire are 25 W/moK and 80x10-8 -m and the length of the wire is 2.2 m. This wire is immersed in a water bath maintained at 300 C. The heat transfer coefficient at the outer surface of the wire is 4500 W/m2 0K.

Calculate the temperature at the centre of the wire and at the surface of the wire.

b) Derive the equation for steady state, one dimensional conduction for the hallow sphere.3a) Derive the expression for the temperature distribution for a Fin of finite length with Insulated tip at the end of the fin.

b) Explain the boundary conditions of first, second and third kinds.

4a) what do you understand by lumped system analysis? Derive an expression for temperature distribution in a body during Newtonian heating or cooling.

(b)Briefly explain the significance of Biot and Fourier number.IEM (MID-I)

1.List out Fayols 14 principles of management and explain them clearly.

2.a) Explain about the types of production layout, advantages and disadvantages of process layout and product layout.

b) What is the importance of maintenance? What the various types of maintenance?3a) what is a process chart? State the advantages of process charts and explain any one process chart.

b) What is work sampling? Explain its need and the procedure of conducting the work sampling study. 4.Construct a charts from the data given below. The sample size is 5.

Sample .No

R

121.825

212.411

315.622

422.65

516.412

68.83

717.420

84.46

918.011

1021.624

_1486977032.unknown

_1486977138.unknown