# Elements of Design 5th Sem/9326/Dec 2015 Automobile Diploma Paper

## Elements of Desgin 5th Sem DEC 2015 Automobile Diploma Paper

### Section a Elements of Desgin 5th Sem DEC 2015 Automobile Paper

Mass production is possible due to ____________

The unit of stress is ____________

For H8-h8 lit minimum clearance is ____________

A basic hole is one whose _________ deviation is zero.

Lack of ductility ______________ .

Muff coupling is designed as ____________ shaft.

The maximum shear stress theory is used for _________ materials.

The design of the shaft is based ___________ and rigidity.

Energy is absorbed by fly wheel virtue of its ____________

In a flange coupling hub is designed as _____________ shaft

A centrifugal clutch works on the principle of centrifugal force.T/F

A keyway lowers the strength of the shaft.T/F

### Section B :Elements of Desgin 5th Sem dEC 2015 Automobile Paper

Solid steel shaft transmits a power of 90 kw at 240 rpm .Taking working stress As 75 mpa find suitable diameter of shaft. if maximum torque transmitted in each Revolution exceeds the mean torque by 20% .find the outer diameter of shaft Where inside is 0.8 times of outside diameter which replaces the solid shaft.

Short note on following
(i) Standardization
(ii) Interchangeability

Solid circular shaft is subjected to a bending moment of 3.46 KN-m and a torsional moment
of 11.5 KN-m.The shaft is made up of C45 steel and factor of safety is Determine the diameter of shaft.the ultimate shear stress is 500 Mpa

Phenomenon of creep briefly.

Coupling and its function and advantages.

Keys and any five types of keys through neat and clean Diagram.Â

Function of clutch.

Various types of clutches.

Design and types of designÂ

## Elements of Desgin 5th Sem dec 2015 Automobile Diploma Paper

### Section c :-Elements of Desgin 5th Sem dec 2015 Diploma Paper

a) Assuming uniform wear ,determine the maximum, minimum and average pressure in a plate clutch when the axial force is 7KN.The inside radius of the contact surface is 50 mm and outside radius is 100 mm

A Design and draw a protective type flange coupling for a steel shaft transmitting 14 kw at 260 rpm and having allowable shear stress 42 mpa the working stress in bolt should not exceed 30 mpa. Assume the same material is used for shaft and key and crushing stress is twice the shearing stress .the maximum torque is 20% greater than full load torque. the shear stress for cast iron is 14 mpa

Design a knuckle joint to transmit an axial load of 140kn assume the working stress For both pin and rod material as 80 n/mm2 in tension, 68 n/mm2 in shear and 160 N/mmÂ²in crushing.