In machine design gears are simple shapes and geometries Wit

In machine design gears are: simple shapes and geometries With straight forward stress analysis Used to transmit and Velocity in a wide variety of applications Not standardized as to tooth shape and size. divided into the following types: spur, helical, bevel, sprocket, pulley and worm brittle fracture becomes more common when a the endurance limit is increased the glass\'transilin temperature is increased the critical stress intensity factor is increased the ductility-transition temperature is increased Basic types of material/component failure are: Environmentally-friendly and Toxic Deformation (time dependent or time independent) and Fracture (static or fatigue) Explosion (thermonuclear or conventional) and Non Explosion (sag or corrode) Good design and bad design Oxidation of metals is an advantage in aluminum because the passive coating of aluminum oxide impedes corrosion of the base material cannot provide passive protection in certain alloys such as stainless steel is always a problem and must be controlled at all costs with coatings and other means cannot be controlled by adding inhibitors or removing oxygen Which of the following are NOT commonly accepted machine elements? Flexible machine elements (ropes, chains, and belts) Clutches, brakes and flywheels Gears (spur, bevel, helical, worm) Bearings (rolling contact, journal) Beams (cantilever, simply supported, curved) Service failure from applied loads can occur in all but which of the following cases quasi-static loading, tension to rupture glide normal to the slip plane cyclic loading, low tension to higher tension Stage 2 creep

Solution

In mahine design,gears are

d) Divided into the following types: spur,helical,bevel,sprocket,pulley and worm

Brittle fracture becomes more common when

c)the critical stress intensity factor is increased

Basic types of material/component faliture are

b) Deformation (time dependent or time independent) and fracture (static or fatigue)

Oxidation of metals

a) is an advantage in aluminum because the passive coating of aluminum oxide impedes corrosion of the base metal

Which of the following are NOT commonly accepted machine elements?

e) Beams(cantilever,simply supported , curved)

Service faliture from applied loads can occur in all but which of the following cases

c) cyclic loading, low tension or higher tension

Four classes of engineering materials are

d) Composites;Metals/alloys;ceramics/glasses;Polymers

shafts,axles and spindles

b) Are used in almost every piece of rotating machinery.