Which theory is suitable for ductile materials?

Which theory is suitable for ductile materials? Maximum shear stress theory What are the yield function and yield criterion for a general state of stress? The yielding response of materials to three-dimensional stress states is described by the well known yield criteria, the Tresca criterion, where yielding is taken to occur at a critical value […]

How does a caliper parking brake work?

How does a caliper parking brake work? There is a cone behind the piston and it moves with the piston when the foot brake is applied. When the parking brake is operated, the brake lever turns the screw on which it is mounted (it also is an an adjusting screw threaded through an adjusting nut). […]

What is positive photoresist and negative photoresist?

What is positive photoresist and negative photoresist? Positive photoresists are able to maintain their size and pattern as the photoresist developer solvent doesn’t permeate the areas that have not been exposed to the UV light. With negative resists, both the UV exposed and unexposed areas are permeated by the solvent, which can lead to pattern […]

Why does my tractor battery keep dying?

Why does my tractor battery keep dying? An alternator and a voltage regulator are part of the electrical system that recharges a riding mower battery. If the parts failed, replacing them may restore power to the battery the next time you run the mower. As a result, the battery may die between mowings. Why won’t […]

Does 609 certification expire?

Does 609 certification expire? Your certification is good for life. However, in 2015 the Section 609 program was updated to include training information for working with R-1234yf.It is strongly recommended to re-certify to obtain this training if you plan to service R-1234yf vehicles. What is the difference between 608 and 609 certification? Section 608 technician […]

What is section method?

What is section method? The method of sections is a process used to solve for the unknown forces acting on members of a truss. The method involves breaking the truss down into individual sections and analyzing each section as a separate rigid body. How do you method a joint? The first step in the method […]

How is a string of Christmas lights wired?

How is a string of Christmas lights wired? Christmas lights are wired as a “series” of lights along a single electrical path. There are two wires attached to the base of each bulb socket – one can be thought of as electricity “in” and the other is electricity “out”. The bulb provides the connection between […]

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