Carbon content is 2%
Maximum compressive strength is 200 N/mm²
Minimum tensile strength is 200 N/mm²
Maximum shear strength is 200 N/mm²
C. Minimum tensile strength is 200 N/mm²
Less than 50 %
More than 50 %
Equal to 50 %
None of these
Carbon content is 2%
Maximum compressive strength is 200 N/mm²
Minimum tensile strength is 200 N/mm²
Maximum shear strength is 200 N/mm²
Brittle when cold
Brittle when hot
Brittle under all conditions
Ductile at high temperature
120°
180°
270°
360°
3 mm
5 mm
10 mm
20 mm
Finishing and polishing
Shotpeening
De-carburisation
Electroplating
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
Shoe brake
Band and block brake
Band brake
Internal expanding brake
The strength of the shaft
The rigidity of the shaft
Both the strength and rigidity of the shaft
The ductility of the shaft
Mild steel
High speed steel
Stainless steel
Aluminium
Surface of the top of the tooth
Surface of the tooth above the pitch surface
Width of the tooth measured along the pitch circle
Surface of the tooth below the pitch surface
Friction angle is less than helix angle
Friction angle is more than helix angle
Friction angle is equal to helix angle
Efficiency of screw is 100%
d = t
d = 1.6 t
d = 2t
d = 6t
p.d.σt
p.t.σt
(p - d) σt
(p - d) t.σt
Mild steel
Dead mild steel
Medium carbon steel
High carbon steel
Tensile stress
Compressive stress
Direct shear stress
Torsional shear stress
3.6 N/mm² compression
3.6 N/mm² tension
7.2 N/mm² compression
7.2 N/mm² tension
2d
3d
4d
5d
0.20
0.35
0.50
0.65
90
60
120
100
Thread
Middle
Shank
Head
Provide cooling action
Lubricate the dies
Help removes chips
All of the above
(1/2) × √(σ² + 4τ²)
√(σ² + 4τ²)
(1/2) × [σ + √(σ² + 4τ²)]
σ + √(σ² + 4τ²)
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
Have contact at the bottom most of the bearing
Move towards right of the bearing making no metal to metal contact
Move towards right of the bearing making the metal to metal contact
Move towards left of the bearing making metal to metal contact
Decreases the power transmitted
Increases the power transmitted
Increase the wrap angle
Increases the belt tension without increasing power transmission
Initial tension
External load applied
Sum of the initial tension and external load applied
Initial tension or external load, whichever is greater
Elastic limit
Ultimate tensile strength
Young's modulus
Endurance limit
1.06
1.12
1.26
1.58
Thick lubricated bearings
Plastic bearings
Antifriction bearings
Thin lubricated bearings