Heat Treatment and Mechanical Advantage Quiz

A device that multiplies force applied to an object using a pivot point.

A rod attached to a wheel, used to multiply force.

Machines that are made up of two or more simple machines.

Machines that are simple and fundamental, often consisting of just one moving part.

A type of chain that is more precise and accurate, typically used for hoists.

A type of chain that is less precise but still suitable for many lifting applications.

A measure of the strength of a material, represented by a number grade (e.g., Grade 8).

A process that changes the properties of a material by applying heat and altering its structure.

The ratio of the output force (load) to the input force (effort) in a machine.

The maximum weight that can be safely lifted or moved by a machine.

The process of using multiple lines of cable to increase the effective pulling force of a winch.

The gear ratio inside a chain hoist, which multiplies the force applied to the hand chain.

The force required to operate a machine or lift a load.

The ratio of the distance traveled by the effort to the distance traveled by the load. It represents the speed advantage provided by a machine.

A measure of how efficiently a machine converts input energy into useful output work. It is calculated as the ratio of Mechanical Advantage to Velocity Ratio, expressed as a percentage.

Large molecules made up of repeating sub-units called monomers. They can be natural or synthetic.

Polymers derived from natural sources, such as plants or animals.

Polymers created through chemical processes.

Materials that are added to polymers to modify their properties, such as flexibility, durability, or resistance to heat or chemicals.

A type of textile sling traditionally made from natural fibers, but has been replaced by modern synthetic materials.

A material that withstands deformation until a high stress level is applied before yielding, deforming, and fracturing.

A material that can withstand deformation at a lower stress level than a brittle material, continuing to elongate before fracturing.

A force that acts across a material, pulling it apart. An example is a lifting lug on a waste skip being lifted.

A force acting across a material in two areas, such as a shackle pin under load.

A pushing force exerted on a material, such as a jack body under load.

A pulling force exerted on a material, such as a chain sling under load.

A twisting force applied to a material, such as a rotating gearbox shaft driving a hoisting appliance.

Heat treatment is a process where metals are heated and cooled to change their internal structure, giving them specific properties.

Heat treatment can make metals stronger (hardening), softer (softening), tougher (tempering), or relieve stress.

Heat treatment involves three key steps: heating, soaking, and cooling. The duration and temperatures of each step influence the metal's final properties.

Hardening and tempering are common heat treatment techniques used to strengthen and toughen steel.

The point at which a material transitions from elastic to plastic deformation. Beyond this point, permanent deformation occurs.

The point at which a material undergoes a significant increase in deformation without a corresponding increase in load. This is often observed as a sudden drop in the load required to continue elongation.

The maximum tensile stress a material can withstand before it starts to fracture.

The percentage increase in length a material experiences before it fractures under tensile stress. This measures the ductility of the material.

The process in which a material under tensile stress begins to deform locally, forming a neck or constriction in the cross-sectional area. This occurs after the material reaches its ultimate tensile strength.

A graphical representation of the stress and strain of a material under tensile loading.

The point on the stress-strain curve where the material's behavior transitions from elastic to plastic deformation.

The stress at which a material fractures under tensile loading. This represents the final point before complete failure.