Inspector of Factories • Paper-II
A simply supported beam carries a couple at a point on its span, the shear force -
A)
varies by cubic law
B)
varies by parabolic law
C)
varies linearly
D)
is uniform throughout
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'varies linearly' (Option C).
Inspector of Factories • Paper-II
The creep in a belt drive is due to the -
A)
material of the pulleys
B)
material of the belt
C)
unequal size of the pulleys
D)
unequal tension on tight and slack sides of the belt
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'material of the belt' (Option B).
Inspector of Factories • Paper-II
The module is the reciprocal of -
A)
diametral pitch
B)
circular pitch
C)
pitch diameter
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'circular pitch' (Option B).
Inspector of Factories • Paper-II
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called-
A)
addendum circle
B)
dedendum circle
C)
pitch circle
D)
clearance circle
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'pitch circle' (Option C).
Inspector of Factories • Paper-II
The cam follower generally used in automobile engines is -
A)
knife edge follower
B)
flat faced follower
C)
spherical faced follower
D)
roller follower
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'spherical faced follower' (Option C).
Inspector of Factories • Paper-II
The two parallel and coplanar shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is called -
A)
spur gearing
B)
helical gearing
C)
bevel gearing
D)
spiral gearing
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'spur gearing' (Option A).
Inspector of Factories • Paper-II
Match List I (Terms) with List II (Definition) and select the correct answer using the codes given below the lists:
List I: A. Module, B. Addendum, C. Circular pitch
List II: 1. Radial distance of a tooth from the pitch circle to the top of the tooth, 2. Radial distance of a tooth from the pitch circle to the bottom of the tooth, 3. Distance on the circumference of the pitch circle from a point of one tooth to the corresponding point on the next tooth, 4. Ratio of a pitch circle diameter in mm to the number of teeth
A)
4 1 3
B)
4 2 3
C)
3 1 2
D)
3 2 4
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '4 2 3' (Option B).
Inspector of Factories • Paper-II
The pair is known as a higher pair, when the relative motion between the elements is -
A)
turning only
B)
sliding only
C)
rolling only
D)
partly turning and partly sliding
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'rolling only' (Option C).
Inspector of Factories • Paper-II
The bulk modulus of a material having E = 200 GPa and G = 80 GPa is -
A)
233.3 GPa
B)
133.3 GPa
C)
250 GPa
D)
160 GPa
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '133.3 GPa' (Option B).
Inspector of Factories • Paper-II
Magnitude of shear stress induced in a shaft due to applied torque varies from -
A)
maximum at centre to zero at circumference
B)
maximum at centre to minimum (not–zero) at circumference
C)
zero at centre to maximum at circumference
D)
Minimum (not zero) at centre to maximum at circumference
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'maximum at centre to zero at circumference' (Option A).
Inspector of Factories • Paper-II
In a Mohr’s circle, the radius gives the value of -
A)
minimum shear stress
B)
maximum normal stress
C)
minimum normal stress
D)
maximum shear stress
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'maximum shear stress' (Option D).
Inspector of Factories • Paper-II
When a particle moves along a straight path, then the particle has -
A)
tangential acceleration only
B)
centripetal acceleration only
C)
both tangential and centripetal acceleration
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'tangential acceleration only' (Option A).
Inspector of Factories • Paper-II
A material with identical properties in all directions is known as -
A)
homogeneous
B)
isotropic
C)
elastic
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'homogeneous' (Option A).
Inspector of Factories • Paper-II
The bolts in a rigid flanged coupling connecting two shafts transmitting power are subjected to
A)
shear force and bending moment
B)
axial force
C)
torsion
D)
torsion and bending moment
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'torsion and bending moment' (Option D).
Inspector of Factories • Paper-II
Shear centre is the point in or outside a section through which the shear force applied produces _________ in the beam
A)
only twisting
B)
only bending
C)
twisting and bending
D)
no twisting and bending
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'twisting and bending' (Option C).
Inspector of Factories • Paper-II
A disturbing mass m1 attached to the rotating shaft may be balanced by a single mass m2 attached in the same plane of rotation as that of m1, such that (where r1 and r2 are the radii of rotation of m1 and m2 respectively)
A)
m1 r1 = m2 r2
B)
m1 r1^2 = m2 r2^2
C)
m1 m2 = r1 r2
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'm1 r1^2 = m2 r2^2' (Option B).
Inspector of Factories • Paper-II
The motion of a piston in the cylinder of a steam engine is an example of -
A)
completely constrained motion
B)
incompletely constrained motion
C)
successfully constrained motion
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 gib and cotter joint, the gib and cotter are subjected to -
A)
single shear only
B)
double shear only
C)
single shear and crushing
D)
double shear and crushing
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'single shear only' (Option A).
Inspector of Factories • Paper-II
A solid shaft of same cross-sectional area and of same material as that of a hollow shaft can resist -
A)
less torque
B)
more torque
C)
equal torque
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'equal torque' (Option C).
Inspector of Factories • Paper-II
The contact ratio for gears is -
A)
zero
B)
less than one
C)
greater than one
D)
infinity
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'zero' (Option A).
Inspector of Factories • Paper-II
Isochronism in a governor is desirable when -
A)
the engine operates at low speeds
B)
the engine operates at high speeds
C)
the engine operates at variable speeds
D)
one speed is desired under one load
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'the engine operates at high speeds' (Option B).
Inspector of Factories • Paper-II
Strain energy stored in a body due to suddenly applied load compared to when applied slowly is -
A)
twice
B)
four times
C)
eight times
D)
half
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'twice' (Option A).
Inspector of Factories • Paper-II
A pulley and belt in a belt drive from a -
A)
cylindrical pair
B)
turning pair
C)
rolling pair
D)
sliding pair
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'rolling pair' (Option C).
Inspector of Factories • Paper-II
The nature of shear stress distribution in a rectangular beam is -
A)
uniform
B)
linear
C)
parabolic
D)
elliptic
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'parabolic' (Option C).
Inspector of Factories • Paper-II
The size of a cam depends upon -
A)
base circle
B)
pitch circle
C)
prime circle
D)
pitch curve
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'base circle' (Option A).
