Piping Design Engineer

Design Engineer Interview questions


1.What are the different types of fits? Explain?
2. What are the factors that can affect the Factor of safety selection?
3. What is heat treatment and why is it done?
4. What are the rules that must be kept in mind while designing castings?
5. What are the points that should be kept in mind during forging design?
6. Describe briefly the different cold drawing processes.
7. What are the different theories of failure under static load, explain briefly?

What are the different types of fits? Explain?

On the basis of Indian standards fits can mainly be categorized into three groups:
Clearance Fit: These types of fits are characterized by the occurrence of a clearance between the two mating parts. The difference between the minimum size of the hole and the maximum size of the shaft is called the minimum clearance, the difference between the maximum size of the hole and the minimum size of the shaft is known as maximum clearance.
Interference Fit: In these types of fits the size of the mating parts are predefined so that interference between them always occurs. The tolerance zone of the hole is completely below the tolerance zone of the shaft.
Transition Fit: As the name suggests these type of fit has its mating parts sized limited to allow either clearance or interference. The tolerance zone of the hole and the shaft overlaps in case of such fits.

For a shaft designated as 40 H8/f7, calculate the tolerances.

Given: Shaft designation = 40 H8/f7
The shaft designation 40 H8/f 7 means that the basic size is 40 mm and the tolerance grade for
the hole is 8 ( i. e. I T 8) and for the shaft is 7 ( i. e. I T 7).
Since 40 mm lies in the diameter steps of 30 to 50 mm, therefore the geometric mean diameter,
D = Square root of (30 x 50) = 38.73 mm
We know that standard tolerance unit,
i = 0.45 x Cube root of (D) + 0.001 D
i = 0.45 × 3.38 + 0.03873 = 1.559 73 or 1.56 microns
i = 1.56 × 0.001 = 0.001 56 mm ...(1 micron = 0.001 mm)
The standard tolerance for the hole of grade 8 (IT8)
= 25 i = 25 × 0.001 56 = 0.039 mm
The standard tolerance for the shaft of grade 7 (IT7)
= 16 i = 16 × 0.001 56 = 0.025 mm

What are the factors that can affect the Factor of safety selection?

The factor of safety is used in designing a machine component. Prior to selecting the correct factor of safety certain points must be taken into consideration such as:
The properties of the material used for the machine and the changes in its intrinsic properties over the time period of service.
The accuracy and authenticity of test results to the actual machine parts.
The applied load reliability.
The limit of stresses (localized).
The loss of property and life in case of failures.
The limit of initial stresses at the time period of manufacture.

thinking up meaning thinking up a hurricane thinking versus feeling thinking versus critical thinking thinking vs thought thinking vs doing design thinking via zoom critical thinking via the abstraction ladder thinking with mathematical models answers investigation 2 thinking with mathematical models answers investigation 1 thinking within the text thinking within the text questions thinking within the box thinking within the text wheel thinking within yourself thinking within the framework thinking within context thinking within the concept thinking without words thinking without language thinking without a banister thinking without thinking thinking without emotion thinking without thought thinking without inner monologue thinking without pictures athinkingape inthinking inthinking ib inthinking psychology inthinking biology inthinking history inthinking spanish b inthinking chemistry inthinking student login design thinking unthinking unthinkingly unthinking synonym unthinking respect for authority unthinking eurocentrism unthinking definition unthinking mastery unthinking meaning thinking about you thinking at the margin thinking about you quotes thinking at the margin definition thinking about you gif thinking bout you lyrics thinking about synonym thinking about thinking thinking bout you thinking blocks thinking bubble thinking bout you dustin lynch thinking bout you lyrics frank ocean thinking bout you frank ocean thinking bout you dustin lynch lyrics thinking cup thinking cap thinking cup boston thinking chair thinking critically thinking cartoon thinking cloud thinking collaborative thinking definition


Share this article





Related Posts



Latest Posts
Aptitude and Psychometric tests
Aptitude and…
Your ability to spot patterns/spatial…
Personality quiz questions
Personality quiz…
The Personality Quiz add-on for Gravity…
Maths tests for job interview
Maths tests for…
Many employers now require potential…
Patent Engineer Interview questions
Patent Engineer…
1. The Degree The first initial requirement…
Award winning Recruitment website
Award winning…
A company’s career website isn’t just…
Search
Featured posts
  • Network Security Engineer Interview questions
  • Patent Engineer Interview questions
  • UX Designer interview questions
  • Fashion Designer interview questions
  • Inside sales interview questions
  • Restaurant supervisor interview questions
  • Amazon technical interview questions
  • veterinary technician interview questions
  • Top 10 manager interview questions
Copyright © 2022 l www.floydfairnessfund.org. All rights reserved.