Contents
How to Prepare for a Technical Interview in Mechanical Engineering
This article addresses the top 26 frequently asked job interview questions and answers during a job interview that you might encounter in a job interview for an entry-level mechanical engineering position. The given list of questions is categorized into three parts.
First, each question is briefly explained. Next, an example of a sample answer to that question is provided. Finally, at the bottom of this article, there are some generic answers for you to use as a template for your own answers to these questions.
They emphasize the basic skills and abilities needed to do the job. Your answers should stress your ability to apply these skills.
Mechanical Engineer Job Interview Questions and Answers
As a mechanical engineer, you will be responsible for designing, developing, and testing mechanical and thermal sensors and devices. In this blog post, we’ll explore some common job interview questions and answers for mechanical engineers.
To conclude, mechanical engineers can expect to be asked a variety of questions in a job interview. However, by preparing answers to common questions, they can increase their chances of impressing potential employers and securing the job. For more interview tips, follow our blog and read our articles.
1. A normalizing operation is carried out in
a) Water
b) Oil
c) Air
d) Furnace
Ans.: c) Air
2. The main purpose of heat treatment of steel is to change the
a) Chemical composition
c) Surface finish
d) Physical properties
Ans.: b) Mechanical properties
3. Which of the following is a non-destructive test?
a) Impact test
b) Charpy’s test
c) Cupping test
Ans.: d) Radiography test
4. Polymerization is associated with
a) Stainless steel
b) Cast iron
d) Duralumin
Ans.: c) Thermoplastic
5. The pattern material in the investment casting is
a) Resin
b) Sand
c) Wax
d) Wood
Ans.: c) Wax
6. The shell moulding process requires
a) Wooden pattern
b) Plastic pattern
c) Sand pattern
d) Metal pattern
Ans.: d) Metal pattern
7. Liquid nitrogen containers can be made from
a) Ferritic stainless steel
b) HSLA steel
c) Titanium
d) Austenitic stainless steel
Ans.: d) Austenitic stainless steel
8. Stretching of rolled rings is done to
a) To meet the dimensional requirement
b) To relieve stress
c) To introduce stresses
d) To improve the finish
Ans.: b) To relieve stress
9. During the manufacturing of springs, the coiling pitch is assumed to be larger than the specified pitch by
a) 5-8%
b) 10-12%
c) 2-5%
d) none
Ans.: a) 5–8%
10. Metric thread has included angle:
a) 60°
b) 55°
c) 30°
d) None
Ans.: a) 60°
11. Which part of the cutting tool is prone to crater wear?
a) Flank
b) Face
c) Shank
d) Base
Ans.: b) Face
12. The crater wear of a cutting tool is due to
a) Chemical action of the coolant
b) excessive heat generated during the cutting operation
c) Rubbing of the tool against the workpiece
d) Abrasive action of the chip
Ans.: d) Abrasive action of the chip
13. Crater wear is predominant in
a) Carbon tool steels
b) Tungsten carbide tools
c) High-speed steel tools
d) Ceramic tools
Ans.: b) Tungsten carbide tools
14. Identify the single-point cutting tool.
a) Milling cutter
b) Hacksaw blade
c) Grinding wheel
d) Cutting tool used in a slotting machine
Ans.: d) Cutting tool used in a slotting machine
15. The angle between the tool face and the plane parallel to the base of the cutting tool is called
a) Lip angle
b) Cutting angle
c) Rack angle
d) Shear angle
Ans.: c) Rack angle
16. In metal cutting operations, the cutting angle is defined as the angle
a) between the flank and the horizontal machined surface
b) between the shear plane and the direction of tool travel
c) between the face of the tool and the line tangent to the machined surface at the cutting point
d) between the tool face and the ground end surface of the flank
Ans.: c) between the face of the tool and the line tangent to the machined surface at the cutting point
17. The angle between the face and the flank of the single-point cutting tool is known as
a) Rack angle
b) Clearance angle
c) Lip angle
d) Point angle
Ans.: b) Clearance angle
18. A cutting tool may be provided with a large positive rack angle to
a) Have better heat dissipation
b) Avoid rubbing with the finished surface
c) Increase the strength of the cutting edge
d) Reduce the magnitude of cutting forces
Ans.: d) Reduce the magnitude of cutting forces
19. Single-point thread cutting tool should ideally have
a) Zero rack angle
b) Positive rack
c) Negative rack
d) Normal rack
Ans.: a) Zero rack angle
20. With an increase in nose radius of single-point cutting tools
a) Tool life increases
b) Excessive heat is generated
c) Surface finish deteriorates
d) Cutting speeds have to be kept small.
Ans.: a) Tool life increases
21. Tool signature
a) is a pictorial view of the tool.
b) Outlines the orthographic projection of the tool
c) represents the complete specification of the tool.
d) is a numerical method of tool identification.
e) Indicate the life of the tool
Ans.: d) is a numerical method of tool identification
22. The cutting speed of a tool refers to
a) Revolution made by the tool in a specified time
b) Revolutions turned by the job at a specified time
c) Distance traveled by the tool in one revolution of the job
d) Rate at which the cutting edge of the tool passes over the surface of the workpiece
Ans.: d) The rate at which the cutting edge of the tool passes over the surface of the workpiece
23. Which is not the primary function of coolant in a metal cutting operation.
a) To cool the tool and workpiece and conduct the heat generated
b) To improve the cutting action
c) To help in giving a bright, shining surface to the job
d) To reduce the friction at the cutting point
Ans.: a) To cool the tool and workpiece and conduct the heat generated
24. Choose the coolant that would be most appropriate for light cuts on aluminum alloys.
a) Kerosene
b) Mineral oil
c) Soluble oil or emulsions
d) Straight fatty oil
Ans.: a) Kerosene
25. Tool life may be measured by the
a) Total time the tool has been in contact with the job
b) Quantity of material removed between the total sharpening
c) Number of workpieces machined between tool sharpening
d) Time for the flank wear to reach a certain dimension
e) Any one of the above
Ans.: e) Any one of the above
26. The tool life is influenced maximum by
a) Cutting speed
b) Tool material and geometry
c) Cutting fluid
d) Surface conditions of the workpiece
e) Skill of the operator
Ans.: a) Cutting speed
