Brittle
Ductile
Elastic
Plastic
A. Brittle
Tensile strength
Compressive strength
Shear strength
Bending strength
Low efficiency
High efficiency
High load lifting capacity
High mechanical advantage
Mild steel
Dead mild steel
Medium carbon steel
High carbon steel
Regain its original shape after deformation when the external forces are removed
Draw into wires by the application of a tensile force
Resist fracture due to high impact loads
Retain deformation produced under load permanently
Longitudinal stress
Circumferential stress
Shear stress
None of these
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between two parts
Similar to stud
Remains constant at all speeds
Is minimum at zero speed and increases monotonically with increase in speed
Is maximum at zero speed and decreases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed
T/2
T
2T
4T
Elastic strength
Yield strength
Shear strength
None of these
Flanged
Threaded
Bell and spigot
Expansion
8
12
18
20
Elliptical cross-section
Major axis in plane of rotation
Major axis twice the minor axis
All the three characteristics
18
16
20
22
Master leaf
Lower leaf
Upper leaf
None of these
K
K/2
2K
K/4
The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy
If Ixx > 4 Iyy, the buckling will occur about Y-axis
If Ixx < 4 Iyy, the buckling will occur about X-axis
The most suitable section for the connecting rod is T-section
d.t.τu
πd.t.τu
π/4 × d².τu
π/4 × d² × t.τu
Increases linearly
Decreases linearly
Remains same
Increases exponentially
√(Pmax / 2m)
√(Pmax / 3m)
√(Pmax / m)
√(3m /Pmax) Where m = mass of belt per metre (kg/m) Pmax = maximum permissible tension in belt (N)
Bevel gearing
Helical gearing
Worm gearing
None of these
0.45
0.55
0.65
0.75
The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
The product of the endurance limits with and without stress concentration
All of the above
Same time to reach earth
Times proportional to weight to reach earth
Times inversely proportional to weight to reach earth
None of the above
M6
M8
M6 - 8d
M8 - 6d
Tearing strength of plate (Pt)
Shearing strength of rivet (Ps)
Crushing strength of rivet (Pc)
Least value of Pt Ps and Pc
Load is in between the fulcrum and effort
Effort is in between the fulcrum and load
Fulcrum is in between the load and effort
None of these
The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley
The belt should not touch the sides of groove in the pulley
None of the above
1.2 d
1.6 d
2d
2.5 d
Low carbon steel
High carbon steel
Medium carbon steel
High speed steel
Is less flexible
Has a much smaller load carrying capacity
Does not provide much warning before failure
Provides much greater time for remedial action before failure