Assistant Design Engineer Interview Preparation Guide

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Guess what? You need to be honest with this answer too – but be careful not to be too negative – or you might talk yourself out of the job altogether! With this answer, ‘safe’ answers might include you hate the fact that sometimes designing particular part may take some time. Sometimes the quality doesn’t meet the numbers, these comments that most people in the design industry would agree with- so they may give you common ground with you interviewer.

This is flat or triangular shape and used for making drawings of machines and structural parts in 1/8, 1/4, 1/2 or full size.

Some of the methods are:

☛ Avoiding sharp corners.
☛ Providing fillets.
☛ Use of multiple holes instead of single hole
☛ Undercutting the shoulder parts.

First Aid is immediate and temporary care given to a person who affected accidental injury or a sudden illness before the arrival of doctor.

In brittle fracture, crack growth is up to a small depth of the material.

In ductile fracture large amount of plastic deformation is present to a higher depth.

A plane which has no shear stress is called principle plane the corresponding stress is called principle stress.

Centreline is a thin line in the form long and short dashes. It indicates area of symmetrical parts, circles and path of motion.

It is a graphical representation of a real thing to define and specify the shape and size of a particular object by means of lines.

Stress concentration is the increase in local stresses at points of rapid change in cross section or discontinuities.

Stress concentration factor is the ratio of maximum stress at critical section to the nominal stress

The various phases of design process are:

☛ Recognition of need.
☛ Definition of problem
☛ Synthesis
☛ Analysis and optimization
☛ Evaluation
☛ Presentation

☛ 1) The buckets along with sand should be placed inside the workshop.
☛ 2) Switches and other electrical parts must be made of fireproof material.
☛ 3) Carbon dioxide gas should be place at required points in special containers.
☛ 4) Fire extinguishers of suitable type should be placed at accessible places.

It is a device to do drawing work neatly and quickly.An attachment provided to move any position and may be adjusted at any required height.

The two types of fracture are

☛ Ductile fracture
☛ Brittle fracture

Endurance limit is the maximum value of completely reversed stress that the standard specimen can sustain an infinite number (106) of cycles without failure.

Repeated stress refers to a stress varying from zero to a maximum value of same nature.

Reversed stress of cyclic stress varies from one value of tension to the same value of compression.

It is the property of the material, which refers to a relative ease with which a material can be cut. It is measured in a number of ways such as comparing the tool life for cutting different material

An accident is a unexpected and unforeseen event which may or may not injury to a person or a machine tool.

It is the ratio of drawing to the object. R.F=Length of the object in the drawing /Actual length of the object.

A drawing which is worked out an engineer for the engineering purpose is known as Engineering Drawing.

In curved beam the neutral axis does not coincide with the centroidal axis.

If the time of load application is less than one third of the lowest natural period of vibration of the part, it is called an impact load.

C frame, crane hook

This is freehand expression of the graphic language.

☛ (a)Dimension Lines
☛ (b)Extension Lines
☛ (c)Leaders
Dimension lines are the thin lines used to indicate extents and direction of dimension. These are terminated with arrowheads.
Extension lines are also thin lines and it used to indicate the termination of a dimension.
Leaders are used to direct notes or identification symbols to feature on the drawing.

Heat treatment can be defined as a combination of processes or operations in which the heating and cooling of a metal or alloy is done in order to obtain desirable characteristics without changing the compositions. Some of the motives or purpose of heat treatment are as follows:
☛ > In order to improve the hardness of metals.
☛ > For the softening of the metal.
☛ > In order to improve the machinability of the metal.
☛ > To change the grain size.
☛ > To provide better resistance to heat, corrosion, wear etc.

Heat treatment is generally performed in the following ways:
☛ > Normalizing
☛ > Annealing
☛ > Spheroidising
☛ > Hardening
☛ > Tempering
☛ > Surface or case hardening