Interview Questions with answers on Production Engineering for Experienced/ Freshers-12

Q: What is the difference between Specification, Codes, and Standards?

Ans.:

Specification is describing properties of any type of materials.

Code is procedure of acceptance and rejection criteria.

Standard is accepted values and compare other with it.

Q: What are the Difference between the 3 jaw Chuck and 4 jaw chuck??

Ans.:

3 jaw chuck	4 jaw chuck
Work pieces cannot be set for eccentric turning	Work pieces can be set for eccentric turning.
Mainly used to hold circular, oval jobs.	Used to hold circular, oval jobs, rectangle and square jobs
Depth of cut given is comparatively less.	More depth of cut can be given.
Less gripping power	More gripping power
3 jaws cannot be adjusted individually	4 jaws can be adjust individually.
Setting up of work is easy	Difficult.
Heavier jobs cannot be turned.	Heavier jobs cannot be turned.

Q: What is difference between Welding and Brazing?

Ans.:

In Welding concentrated heat (high temperature) is applied at the joint of metal and fuse together.

In Brazing involves significantly lower temperatures and does not entail the melting of base metals. Instead, a filler metal is melted and forced to flow into the joint through capillary action.

Q: What is the least-count of Vernier Caliper and Screw Gauge??

Ans.:

Vernier Caliper:  

LC = (Value of 1 Main Scale Division) / (Total number of vernier scale divisions)

In most of the Vernier Caliper’s, LC= 0.1 mm = [1mm / 10 divisions]

Screw Gauge:

Least count = (Value of 1 pitch scale reading)/ (Total number of head scale divisions)

In most of the Screw Gauge’s, LC= [1mm / 100 divisions] = 0.01 mm

Q: What are the main difference between Iron and Mild Steel?

Ans.:

Cast iron	Steel
Cast iron is a hard grey metal.	Steel is an alloy or iron
Cast iron is cheaper than steel	Costlier.
CI has a low melting point with the ability to mold easily.	Steel is mild and harder to cast, and loses viscosity.
Cast iron is used for making manhole covers, piping and guttering.	Steel is fabricated to make tools, structures, knives etc.

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