Previous year question paper for DME (B-TECH mechanical engineering 6th)

1. Transmission Drives

Belt and rope drives: Basics, Characteristics of belt drives, selection of flat belt, Design of Flat

belt, V-belt and rope (steel wire), Design of the pulley for the same

Chain Drives: Basics, Roller chains, polygonal effect, power rating, selection of chain

Gear drives: Standard system of gear tooth and gear module, gear tooth failure, strength of gear

tooth, terminology of spur, helical, bevel, worm and worm wheel, Design of spur, helical,

straight bevel gears, worm and worm wheel

2. Bearings

Slider: Principle of hydrodynamic lubrication, modes of lubrication, Reynolds equation, bearing

performance parameters, slider bearing design

Roller: Types, selection guidelines, static and dynamic load carrying capacity, Stribeck’s

equation, equivalent bearing load, load life relationship, selection of bearing, comparison of

roller and slider bearing

3. Design of Flywheel

Introduction, Energy stored in a flywheel, stresses in a rim, design considerations

4. Springs

Types; end styles of helical compression spring; stress and deflection equation; surge in spring;

nipping of leaf spring; Design of close-coil helical spring and multi leaf spring

5. Clutches

Design of contact clutches i.e. plate, multi-disc, cone and centrifugal clutches.

6. Brakes

Design of band, disc, block with shoe and internal expanding brakes.