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Past Questions
A process of generating a gear by means of a cutter that revolves and cuts like a milling cutter is called
A)
Gear hobbing
B)
Rack cutter process
C)
slotting
D)
None of the above
Gear hobbing is the process of generating gear teeth using a rotating cutting tool called a hob, which cuts continuously in a manner similar to a milling cutter. This matches the description of a cutter that revolves and cuts like a milling cutter.
Option b, rack cutter process, refers to gear generation using a rack-type cutter, not a revolving hob. Option c, slotting, is a reciprocating machining process used for internal shapes, keyways, and slots, not standard gear generation by a revolving cutter. Therefore, the correct answer is a.
Young’s modulus may be defined as the ratio of -
A)
linear stress to linear strain
B)
linear stress to lateral strain
C)
lateral strain to linear strain
D)
shear stress to shear strain
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'linear stress to linear strain' (Option A).
Which one is not part of important steps for project planning
A)
Market survey
B)
Project capacity
C)
Selection of site
D)
None of these
The correct answer is **d. None of these** because all the listed items are important steps in project planning. A **market survey** is needed to assess demand and feasibility, **project capacity** must be decided to match expected output and resources, and **selection of site** is a key planning decision affecting cost, logistics, and operations. Since each option is part of project planning, none of them is excluded.
Heat treatment of steel not included the following processes
A)
annealing
B)
normalising
C)
hardening
D)
supercharging
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'annealing' (Option A).
In which of the following machine, the work rotates and the tool is stationary ?
A)
Vertical boring machine
B)
Precision boring machine
C)
Jig boring machine
D)
Horizontal boring machine
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Vertical boring machine' (Option A).
When a machine member is subjected to torsion, the torsinal shear stress set up in the member is-
A)
maximum at the centroidal axis and zero at the outer surface of the member
B)
zero at both centroidal axis and outer surface of the member
C)
maximum at both the centroidal axis and outer surface of the member
D)
zero at the centroidal axis and maximum at the outer surface of the member
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'zero at both centroidal axis and outer surface of the member' (Option B).
What is a prime consideration in designing the new plant building
A)
Material handling
B)
Drawings
C)
Machine loading
D)
Value engineering
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Drawings' (Option B).
Gears are casted by -
A)
Permanent mould casting
B)
sand mould casting
C)
Slush casting
D)
centrifugal casting
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'sand mould casting' (Option B).
The operation of cutting a flat sheet to the desired shape is called
A)
shearing
B)
piercing
C)
blanking
D)
punching
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'shearing' (Option A).
A machine tool is a device by which jobs are shaped in desired sizes by removing the excess materials in the form of chips
A)
True
B)
False
The statement is true. A machine tool is a power-driven machine used to shape a workpiece to the required size and form by removing excess material in the form of chips (for example, on a lathe, milling machine, or drilling machine). Therefore, option (a) is correct. Option (b) is incorrect because it contradicts the standard definition of a machine tool.
A machine used to be bore holes in large and heavy parts such as an engine frame,steam engine cylinders, machine housing etc is
A)
grinding machine
B)
boring machine
C)
planning machine
D)
milling machine
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'milling machine' (Option D).
Hook’s Law holds good up to -
A)
Yield point
B)
Breaking point
C)
Elastic Limit
D)
Plastic Limit
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Breaking point' (Option B).
Lathe bed is made of
A)
pig iron
B)
chilled cast iron
C)
alloy steel
D)
mild steel
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'pig iron' (Option A).
Which of the following charts are used for plant layout design ?
A)
Operation process chart
B)
Man machine chart
C)
Travel chart
D)
All of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'All of these' (Option D).
Which one is not part of important factors which are required to be considered forselection of exact plant location
A)
Easy access
B)
Availability of cheap, sufficient and suitable land
C)
cost of material required for construction
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'none of these' (Option D).
A machine tool that removes metal as the work is fed against a rotating multipoint cutter is
A)
milling machine
B)
grinding machine
C)
boring machine
D)
gear hobbing machine
A milling machine removes metal by feeding the workpiece against a rotating multipoint cutter (the milling cutter). This is the standard definition of milling.
Why others are incorrect:
- b) Grinding machine: removes metal using an abrasive wheel, not a multipoint cutting tool.
- c) Boring machine: enlarges or finishes existing holes using a single-point cutting tool, not a rotating multipoint cutter.
- d) Gear hobbing machine: a specialized machine for cutting gears with a hob; it is not the general machine described in the question.
Heat treatment refers to a combination of processing of a metal or alloy in the solidstate of the purpose of obtaining desired properties
A)
heating & cooling
B)
welding & lighting
C)
balancing & wiring
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'welding & lighting' (Option B).
A beam which is fixed at one end and free at the other is called
A)
fixed beam
B)
simply supported beam
C)
over hanging beam
D)
cantilever beam
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'fixed beam' (Option A).
A welding which is done by burning a combustible gas with air or oxygen in a concentrated flame of high temperature is
A)
Braze welding
B)
Electric welding
C)
Gas welding
D)
Arc welding
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Gas welding' (Option C).
The direct stress, across a principal plane is known as principal stress
A)
Yes
B)
No
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Yes' (Option A).
The unit of stress in S.I. unit is -
A)
N/mm2
B)
KN/mm2
C)
N/m2
D)
All of these
Stress is defined as force per unit area. In the SI system, force is measured in newtons (N) and area in square metres (m²), so the SI unit of stress is N/m², also called pascal (Pa). Therefore option (c) is correct. Option (a) N/mm² is a commonly used engineering unit but not the SI base unit. Option (b) kN/mm² is also not the SI unit; it is a much larger derived unit. Option (d) is incorrect because only N/m² is the SI unit among the given choices.
The cam follower generally used in air-craft engine is
A)
Knife edge follower
B)
flat faced follower
C)
spherical faced follower
D)
roller follower
The cam follower generally used in aircraft engines is the **roller follower (d)**. Roller followers are preferred in high-speed, heavily loaded applications because rolling contact greatly reduces friction and wear, and they can operate more smoothly and reliably at high speeds.
Why the others are incorrect:
- **Knife edge follower (a):** Has very high contact stress and wear, so it is unsuitable for high-speed engine applications.
- **Flat faced follower (b):** Can be used in some mechanisms, but it is not the usual choice for aircraft engines where low friction and durability are critical.
- **Spherical faced follower (c):** Used to reduce edge stresses in flat-faced followers, but it is not the standard follower type generally associated with aircraft engines.
Hence, the correct answer is **roller follower**.
The material which can be best cut with oxygen cutting process is
A)
brass
B)
copper
C)
aluminium
D)
mild steel
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'copper' (Option B).
Shear modulus is the ratio of -
A)
linear stress to linear strain
B)
shear stress to shear strain
C)
linear strain to lateral strain
D)
volumetric strain to linear strain
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'volumetric strain to linear strain' (Option D).
The difference between the upper limit and lower limit of a dimension is called
A)
nominal size
B)
tolerence
C)
basic size
D)
actual size
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'actual size' (Option D).