EMC Practice questions

Which are true statements concerning plastics following their intial polymerization:

In order: The highest to lowest elastic modulus:

Which of the composite matrices can be formed in the solid liquid and vapour states

Rolling of plastic into sheet like shapes is referred to as:

Which of the powder metallurgy forming processes may not require to be followed by the sintering process

Stress is the amount of deformation that occurs during a tensile test

First point of the stress vs strain chart:

Which hardness measurement method employs a minor and major load and measures the defferntial depth of penetration:

Check all that are correct :The last two points of the stress vs strain chart: Ultimate strength - fracture point

True or false: Hardness testing based on the leeb principle are members of the resistance to penetration family of hardness tests

Identify all the micro hardness techniques from the following

Match statement with correct corresponding category

1 KSI = to Approx 7 MPA

Which test utilizes a penduulum to break a speciment that is notched and supported at both ends to measure absorbed energy

Carburizing and flame hardening are examples of:

The phases seen on the time temperature transformation diagram were, choose all that were correct

What is the prupose of tempering operations?

Annealing is used to soften the material

What are the properties associated with martensite?

If the object of the heat treatment process is to create martensite, which process would be chosen

Which heat treatment almost always follows hardening

Which heat treatment process would normaly be applied to weldments after welding

Which method applies two different gas streams

The welding mthod that employs resistant heat has a small protraction to concentrate the heat that is called:

Cold rolling sheet steel usually begins with a material that:

Machninablity and fatigue resistance are improved in most metals that have been:

Discontinuities with their origin in the original ingot can be reduced in severity by the closing and welding of voids and the breaking up and elongation of inclusion by which of the follow processes?

A process that requires the use of large powerful equipment that forms ductile material into a wide variety of long length uniform cross-sectional shapes best describes:

Open die forging is particularly suitable to produce parts:

A definite break I the material caused by excessive working of the metal during the forging rolling or extruding operation is called a:

Wrought products invariably exhibit:

The mill working process used most to form metals into 3D shapes is:

Which of the following product forms is generally selected for high strength and controlled property directionally?

Which of the following is not found in a forging

Most seamless tubing made without welds is processed by:

A cold shut results from turbulent pour when a globule freezes on the wall and does not fully fuse into the casting.

Centrifugal casting can be conducted with the mould in a vertical position

Which component is not required for galvanic corrosion to occur?

Crevice corrosion isa form of galvanic corrosion