Manufacturing Design Test
The
modulus of elasticity of material A is 100 newtons per square meter and of
material B is 200 newtons per square meter. Calculate the modular ratio between
the two materials.
a. 3
b. 2
c. 1
d. 0.5
_____________
is fixed at one end and free at the other end.
a. Overhanging
beam
b. Continuous
beam
c. Simply
supported beam
d. Cantilever
beam
This
question is based upon the figure shown below
In
the above drawn Mohr's circle for stress, which is the angle of obliquity?
a. angle
BCA
b. angle
BEA
c. angle
BDA
In a
helical gear, the helix angle for a single helical gear ranges from _____________.
a. 5°
to 20°
b. 20°
to 35°
c. 40°
to 55°
d. 60°
to 75°
Calculate
the resilience of a body having a volume of 1000 cubic meters, which is
subjected to a stress of 60 newtons per square meter. The Young's modulus for
the material of the body is 2 x 105 newtons per square meter.
a. 8
newtons per meter
b. 9
newtons per meter
c. 10
newtons per meter
d. 12
newtons per meter
_____________
is used only for the transmission of bending moment.
a. Shaft
b. Axle
c. Spindle
d. Gear
_____________
is the value of ratio of the maximum shear stress with load acting parallel to
the weld to
the
maximum shear stress when load acts perpendicular to the weld.
a. 0.675
b. 0.775
c. 0.875
d. 0.975
If
the rivet hole diameter is 19.5 millimeters, calculate the nominal diameter of
the rivet.
a. 16
millimeters
b. 18
millimeters
c. 20
millimeters
d. 22
millimeters
The
pitch of the rivet should never be less than _____________.
Here d is the diameter of the rivet
a. d
b. 2d
c. 6d
d. 8d
The
resistance of a bolt can be increased by _____________.
a. increasing
the shank diameter of the bolt
b. increasing
the length of the bolt
c. decreasing
the shank diameter of the bolt
d. decreasing
the length of the bolt
In a
screw thread, the nominal diameter represents the _____________.
a. major
diameter
b. minor
diameter
c. pitch
diameter
d. effective
diameter
Calculate
the pitch of a thread, given that the number of threads per unit length of
screw is 10.
a. 1
b. 0.1
c. 0.01
d. 0.001
The
power transmitted is maximum in a belt drive, when the maximum tension in the
belt is _____________ the centrifugal tension.
a. half
of
b. two
times
c. three
times
d. equal
to
In a
full journal bearing, the angle of contact of the bearing with the journal is _____________.
a. 90°
b. 180°
c. 270°
d. 360°
Calculate
the force responsible for the shearing or crushing of a key, given that the
radius of the shaft is 50 millimeters and the torsional moment transmitted by
the shaft is 1000 newtons millimeter.
a. 10
newtons
b. 20
newtons
c. 30
newtons
d. 40
newtons
Calculate the bending stress induced
in the shank of the bolt, given that the length of the bolt is 10 millimeters,
Young's modulus of material of bolt is 2 x 105 newtons per square
millimeter and the difference in height between the extreme corners of the nut
is 3 millimeters.
a. 3 x104 newtons per square millimeter
b. 4 x 104 newtons per square millimeter
c. 5 x 104 newtons per square millimeter
d. 6 x 104 newtons per square millimeter
Calculate
the solid length of a spring, given that the number of coils in the spring is
10 and the diameter of the spring wire is 2 millimeters.
a. 5
millimeters
b. 10
millimeters
c. 15
millimeters
d. 20
millimeters
Which
type of nut among the following is used on objects which are subjected to
sudden shocks and vibrations?
a. Jam
nut
b. Sawn
nut
c. Castle
nut
d. Penn
nut
e. Lock
nut
The
mean diameter of the coil of a spring is 10 millimeters and the diameter of the
spring wire is 5 millimeters. Calculate the spring index.
a. 1
b. 2
c. 3
d. 4
Calculate the flexural rigidity of a
beam, given that the bending moment of the beam is 20, Young's modulus is 2 x
105 newtons per square meter and the moment of inertia is 20
(millimeter)4.
a. 40 x 105 newtons per square meter
b. 20 x 105 newtons per square meter
c. 10 x 105 newtons per square meter
d. 2 x 105 newtons per square meter
If
the strength of the key and the shaft is equal, then the length of the key will
be _____________.
a. equal
to the diameter of the shaft.
b. 1.2
times the diameter of the shaft
c. 2
times the diameter of the shaft
d. 1.8
times the diameter of the shaft
e. half
of the diameter of the shaft
In a
single start threaded worm gear, the lead is _____________ the axial pitch.
a. two
times
b. equal
to
c. half
of
d. three
times
e. one
fourth of
The
value of the lateral strain in a steel rod is 100 meters and the value of the
linear strain in the same rod is 300 meters. Calculate the Poisson's ratio.
a. 3
b. 4/3
c. 1/3
d. 2/3
In a
long bearing, the ratio of the length of the journal to the diameter of the
journal is _____________.
a. less
than 1
b. equal
to 1
c. greater
than 1
Which
type of coupling is used when two shafts intersect at a small angle?
a. Leather
link coupling
b. Oldham
coupling
c. Falk
coupling
d. Fluid
coupling
e. Hooke's
joint coupling
Calculate
the power transmitted by a shaft, given that the twisting moment in the shaft
is 20 newton meters and the speed of rotation of the shaft is 60 rpm.
a. 116.6
watts
b. 126.6
watts
c. 136.6
watts
d. 146.6
watts
Calculate the length of the shaft on
which a torque of 10 newton millimeters is applied. The polar moment of inertia
on the shaft is 10 (millimeter)4. The angle of twist of the shaft is
10 radians and the modulus of rigidity is 10 newtons per square millimeter.
a. 50 millimeters
b. 100 millimeters
c. 150 millimeters
d. 200 millimeters
Calculate the radius of curvature of
a beam on which a bending stress of 1000 newtons per square meter is applied.
The distance from extreme fiber to the neutral axis of the beam is 50 meters
and the value of the Young's modulus for the material of the beam is 2 x 105
newtons per square meter.
a. 1000 meters
b. 2000 meters
c. 3000 meters
d. 5000 meters
Calculate
the diameter of a hole which is to be drilled in a 50 millimeters bolt, given
that the core diameter is 40 millimeters.
a. 10
millimeters
b. 15
millimeters
c. 25
millimeters
d. 30
millimeters
If
the diameter of the rivet hole is 10 millimeters, calculate the shearing area
at the cross section of the rivet.
a. 78.5
millimeters
b. 7.85
millimeters
c. 785
millimeters
d. 0.785
millimeters
If
the tension on the tight side of a belt is 10 newtons, the tension on the slack
side is 5 newtons and the velocity of the belt is 10 meters per second,
calculate the power transmitted by the belt.
a. 40
watts
b. 50
watts
c. 60
watts
d. 70
watts
_____________
are used to connect two non-parallel or intersecting shafts which are coplanar
in nature.
a. Spur
gears
b. Helical
gears
c. Bevel
gears
d. Spiral
gears
Calculate
the strength factor of a gear, given that the maximum bending stress is 40 newtons
per square millimeter and the Lewis form factor is 10?
a. 400
b. 500
c. 600
d. 700
Which among the following is the
correct expression for equivalent twisting moment?
Here, M is the bending moment and T is the twisting moment
Here, M is the bending moment and T is the twisting moment
a. √M2 + T2
b. √M2 - T2
c. √M2 x T2
d. √M2 / T2
For
a plate thickness ranging between 10 millimeters to 16 millimeters, the minimum
weld size will be _____________.
a. 14
millimeters
b. 20
millimeters
c. 6
millimeters
d. 10
millimeters
Calculate
the maximum shear stress developed in a rectangular cross sectional beam having
an average shear stress of 50 newtons per square meter.
a. 25
newtons per square meter
b. 50
newtons per square meter
c. 75
newtons per square meter
d. 100
newtons per square meter
Which
among the following types of bevel gear connects two shafts whose axes
intersect at right angles?
a. Mitre
gear
b. Crown
bevel gear
c. Angular
bevel gear
d. Internal
bevel gear
The
distance between the center of adjacent rivets on adjacent gauge lines is known
as _____________.
a. diagonal
pitch
b. pitch
c. marginal
distance
d. unit
length
The
module of a gear is 10 millimeters and the number of teeth is 25. Calculate the
pitch circle diameter of the gear.
a. 200
millimeters
b. 250
millimeters
c. 400
millimeters
d. 500
millimeters
The
included angle in a British Standard Whitworth thread is _____________.
a. 47.5°
b. 60°
c. 45°
d. 55°