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Past Questions
Drilling is an example of
A)
orthogonal cutting
B)
oblique cutting
C)
simple cutting
D)
uniform cutting
Drilling uses a multi-edge inclined cutting action and is classified as oblique cutting.
Therblig in micromotion study, is described by
A)
Anevent
B)
Colours only
C)
Standard symbol and colour
D)
Symbols.
A Therblig is a standardized micromotion element represented by a symbol and commonly an associated colour.
The process extensively used for making bolts and nuts is
A)
hot piercing
B)
extrusion
C)
cold peening
D)
cold heading
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'extrusion' (Option B).
Haematite iron ore contains iron about
A)
30%
B)
45%
C)
55%
D)
70%
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is '55%' (Option C).
Monel metal is an alloy of
A)
nickel and copper
B)
nickel and chromium
C)
nickel, chromium and iron
D)
copper and chromium
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'nickel, chromium and iron' (Option C).
Which of the following welding process uses non-consumable electrodes?
A)
TIG welding
B)
MIG welding
C)
Manual are welding
D)
Submerged are welding
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'Manual are welding' (Option C).
Queing theory is associated with which of the
A)
Production time
B)
Waiting time
C)
Scales
D)
Inspection time
Queueing theory studies waiting lines and waiting time.
The property of a material essential for spring materials is
A)
stiffness
B)
ductility
C)
resilience
D)
plasticity
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'stiffness' (Option A).
Killed Steels
A)
have minimum impurity level
B)
are produced by L-D process
C)
have almost zero percentage of phosphorus and sulphur
D)
are free from oxygen
Killed steel is thoroughly deoxidized; among these options, A is the closest general description.
Structural sections such as rails, angles, I-beams are made by
A)
hotrolling
B)
hot drawing
C)
hot piercing
D)
hot extrusion
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'hot piercing' (Option C).
When the cutting edge of the tool is dull, then during machining
A)
continuous chips are formed
B)
discontinuous chips are formed
C)
continuous chips with built-up edge are formed
D)
no chips are formed
A dull tool tends to form a built-up edge under ordinary ductile-machining conditions.
The electrodes used in spot welding have a tip of
A)
stainless steel
B)
aluminium
C)
copper
D)
brass
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'aluminium' (Option B).
Acetylene gas is stored in cylinders in
A)
solid form
B)
gaseous form
C)
liquid form
D)
none of these
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'none of these' (Option D).
The lathe spindles at the nose end have
A)
internal screw threads
B)
external screw threads
C)
no threads
D)
tapered threads
Lathe spindle noses commonly use taper/thread arrangements; among the given choices, tapered threads is the keyed form.
In electro-discharge machining, tool is made of
A)
brass
B)
copper
C)
copper tungsten alloy
D)
all ofthese
EDM tools/electrodes can be brass, copper, and copper-tungsten, so all listed materials are usable.
With the same tool life, the maximum material per minute is removed by
A)
increasing the cutting speed
B)
decreasing the cutting speed
C)
increasing the depth of cut
D)
increasing the feed rate
At fixed tool life, increasing feed is the most direct way to raise material-removal rate without the strong tool-life penalty of speed.
For which of the following stop watch is not needed?
A)
R-chart
B)
Micromotion study
C)
SIMO chart
D)
None of these
An R-chart uses measured variation/ranges in sampled process data, not elapsed stopwatch time.
A single point thread cutting tool should ideally have
A)
zero rake angle
B)
positive rake angle
C)
negative rake angle
D)
point angle
Threading tools are ideally ground with approximately zero rake for standard single-point thread cutting.
The mathematical technique for finding the best use of limited resources of a company in the maximum manner is known as
A)
Value analysis
B)
network analysis
C)
linear programming
D)
queuing theory
Linear programming is a mathematical method used to determine the best possible outcome under given constraints.
Soft materials cannot be economically grind due to
A)
high temperature involved
B)
frequent wheel clogging
C)
rapid wheel wear
D)
low work piece stiffness
Soft wheels tend to glaze/clog or load with work material under soft-material grinding conditions; clogging is the main issue.
If the cutting speed is increased, then the built-up-edge
A)
becomes longer
B)
may or may not form
C)
becomes smaller and finally does not form at all
D)
has nothing to do with speed
As cutting speed increases, built-up edge first diminishes and eventually disappears.
In the austempering process of heat treatment, austenite changes into
A)
martensite
B)
troostite
C)
sorbite
D)
bainite
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'troostite' (Option B).
Dielectric is used in
A)
electro-chemical machining
B)
ultra-sonic machining
C)
electro-discharge machining
D)
laser machining
EDM uses a dielectric liquid as the insulating/flushing medium between tool and workpiece.
The consumable electrode is used in
A)
carbon arc welding
B)
submerged arc welding
C)
T1Garc welding
D)
MIG arc welding
In the context of Mechanical Engineering, the most appropriate and technically accurate answer is 'MIG arc welding' (Option D).
Crater wear occurs mainly on the
A)
nose part, front relief face and side relief face of the cutting tool
B)
face of the cutting tool at a short distance from the cutting edge only
C)
cutting edge only
D)
front face only
Crater wear forms on the rake/face of the tool a short distance behind the cutting edge.