Inspector of Factories • Paper-II
Which of the following displacement diagrams should be chosen for better dynamic performance of a cam-follower mechanism?
A)
simple harmonic motion
B)
parabolic motion
C)
cycloidal motion
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'parabolic motion' (Option B).
Inspector of Factories • Paper-II
In the welded joint shown in the given figure, if the weld at B has thicker fillets than that at A then the load carrying capacity P, of the joint will -
A)
increase
B)
decrease
C)
remain unaffected
D)
exactly get doubled
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'decrease' (Option B).
Inspector of Factories • Paper-II
The angle between the direction of the follower motion and a normal to the pitch curve is called -
A)
pitch angle
B)
prime angle
C)
base angle
D)
pressure angle
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'base angle' (Option C).
Inspector of Factories • Paper-II
Which among the following is the condition for maximum acceleration in Hooke’s joint?
A)
cos2(2sin2/2sin2)
B)
cos(2sin2/2sin2)
C)
cos 2(2sin2/2sin2)
D)
cos 2(sin2/2sin2)
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'cos(2sin2/2sin2)' (Option B).
Inspector of Factories • Paper-II
If w/w is very high for a body vibrating under steady state vibrations, the phase angle for all values of n damping factors, will tend to approach -
A)
0°
B)
90°
C)
180°
D)
360°
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '0°' (Option A).
Inspector of Factories • Paper-II
Three–moment theorem for continuous beams was forwarded by -
A)
Bernoulli
B)
Clapeyron
C)
Castigliano
D)
Maxwell
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Bernoulli' (Option A).
Inspector of Factories • Paper-II
Involute profile is preferred to cycloidal because -
A)
the profile is easy to cut
B)
only one curve is required to cut
C)
the rack has straight line profile and hence can be cut accurately
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'the profile is easy to cut' (Option A).
Inspector of Factories • Paper-II
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if w/w is
A)
equal to one
B)
equal to square root 2
C)
less than square root 2
D)
greater than square root 2
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'greater than square root 2' (Option D).
Inspector of Factories • Paper-II
Scotch yoke mechanism is the inversion of
A)
Single slider kinematic chain
B)
Double slider kinematic chain
C)
Four bar chain
D)
None of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Double slider kinematic chain' (Option B).
Inspector of Factories • Paper-II
Poisson’s ratio is defined as ratio of -
A)
axial strain to transverse strain
B)
transverse strain to axial strain
C)
shear strain to axial strain
D)
axial strain to shear strain
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'axial strain to transverse strain' (Option A).
Inspector of Factories • Paper-II
At the point of application of a point load on a beam there is -
A)
maximum bending moment
B)
sudden change of shape of bending moment diagram
C)
maximum deflection
D)
point of contraflexure
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'maximum bending moment' (Option A).
Inspector of Factories • Paper-II
The variation of bending stress in a curved beam is -
A)
linear
B)
parabolic
C)
hyperbolic
D)
cubic
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'parabolic' (Option B).
Inspector of Factories • Paper-II
For a speed ratio of 100, smallest gear box is obtained by using -
A)
a pair of spur gears
B)
a pair of helical and a pair of spur gear compounded
C)
a pair of bevel and a pair of spur gear compounded
D)
a pair of helical and a pair of worm gear compounded
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'a pair of bevel and a pair of spur gear compounded' (Option C).
Inspector of Factories • Paper-II
In a coupling rod of a locomotive, each of the four pairs is a __________ pair.
A)
Sliding
B)
Turning
C)
Rolling
D)
Screw
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Screw' (Option D).
Inspector of Factories • Paper-II
The working surface above the pitch surface of the gear tooth is termed as -
A)
addendum
B)
dedendum
C)
flank
D)
face
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'addendum' (Option A).
Inspector of Factories • Paper-II
In a transversally loaded beam, the maximum tensile stress occurs at the -
A)
top edge
B)
bottom edge
C)
neutral axis
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'neutral axis' (Option C).
Inspector of Factories • Paper-II
The wheels of a moving car possess -
A)
potential energy only
B)
kinetic energy of translation only
C)
kinetic energy of rotation only
D)
kinetic energy of translation and rotation both
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'potential energy only' (Option A).
Inspector of Factories • Paper-II
In a kinematic chain, a quaternary joint is equivalent to -
A)
one binary joint
B)
two binary joints
C)
three binary joints
D)
four binary joints
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'four binary joints' (Option D).
Inspector of Factories • Paper-II
The ratio of linear stress to linear strain is known as -
A)
bulk modulus
B)
modulus of rigidity
C)
Young’s modulus
D)
Poission’s ratio
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'modulus of rigidity' (Option B).
Inspector of Factories • Paper-II
The direction of linear velocity of any point on a link with respect to another point on the same link is-
A)
parallel to the link joining the points
B)
perpendicular to the link joining the points
C)
at 45° to the link joining the points
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'at 45° to the link joining the points' (Option C).
Inspector of Factories • Paper-II
In case of biaxial stresses, the maximum value of shear stress is -
A)
difference of normal stresses
B)
half the difference of normal stresses
C)
sum of normal stresses
D)
half the sum of normal stresses
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'half the sum of normal stresses' (Option D).
Inspector of Factories • Paper-II
Leaf springs are subjected to -
A)
tensile stress
B)
compressive stress
C)
shear stress
D)
bending stress
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'bending stress' (Option D).
Inspector of Factories • Paper-II
The buckling load for a given material depends upon -
A)
Poisson’s ratio and slenderness ratio
B)
Poisson’s ratio and modulus of elasticity
C)
Slenderness ratio and cross-sectional area
D)
Slenderness ratio and modulus of elasticity
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Poisson’s ratio and modulus of elasticity' (Option B).
Inspector of Factories • Paper-II
According to Aronhold Kennedy’s theorem, if three bodies move relatively to each other, their instantaneous centres will lie on a -
A)
straight line
B)
parabolic curve
C)
ellipse
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'none of these' (Option D).
Inspector of Factories • Paper-II
In a four bar chain or quadric cycle chain -
A)
each of the four pairs is a turning pair
B)
one is a turning pair and three are sliding pairs
C)
three are turning pairs and one is sliding pair
D)
each of the four pairs is a sliding pair
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'each of the four pairs is a turning pair' (Option A).
