0.01 micron
0.1 micron
1 micron
10 microns
C. 1 micron
Cast iron
Wrought iron
Mild steel
Aluminium
Parallel
Perpendicular
Both A and B
None of these
F + P
F P
P
F
Lighter and easier to handle
Greater shock absorption
Smoother inside walls
All of the above
Major diameter
Minor diameter
Pitch diameter
Core diameter
Dynamic loading
Static loading
Combined static and dynamic loading
Completely reversed loading
1 in 16
1 in 32
1 in 48
1 in 100
Less than 50 %
More than 50 %
Equal to 50 %
None of these
When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test
When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test
When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test
εc + 2εl
2εc + εl
εc + εl²
εc² + εl
Straining
Fatigue
Creep
Sudden loading
1/sinθ
1/cosθ
1/tanθ
sinθ cosθ
Pitch circle diameter × cosφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × sinφ
Varies linearly
Is uniform throughout
Varies exponentially, being more near the torque-input end
Varies exponentially, being less near the torque-input end
Addendum
Dedendum
Clearance
Working depth
Decreases the power transmitted
Increases the power transmitted
Increase the wrap angle
Increases the belt tension without increasing power transmission
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Its capability of storing energy
Its ability to absorb shocks
One-eighth
One-fourth
One-half
Double
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
Transmission
Machine
Machine frame
None of these
Increase the key length
Increase the key depth
Increase the key width
Decrease the key length
Mild steel
High speed steel
Stainless steel
Aluminium
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%
The V-belt may be operated in either direction with tight side of the belt at the top or bottom
The V-belt drive is used with large centre distance
The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
The ratio of driving tensions in V-belt drive is more than flat belt drives
Shear stress in each spring will be equal
Load taken by each spring will be half the total load
Only A is correct
Both A and B is correct
P1 - P2
P1 + P2
2 × (P1 + P2)
[2 × (P1 + P2)] + Pc Where Pc is centrifugal tension
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
Regains its original shape after deformation when the external forces are removed
Draw into wires by the application of a tensile force
Resists fracture due to high impact loads
Retain deformation produced under load permanently
Pan Head
Snap head
Counter sunk head
Conical head
Axial load only
Both radial and axial loads and the ratio of these being greater than unity
Radial load only
Both radial and axial loads and the ratio of these being less than unity