0.70
0.25
0.40
0.55
D. 0.55
120°
180°
270°
360°
Self locking bolts
Designed for shock load
Used in aircraft application
Provided with hexagonal depression in head
Whose upper deviation is zero
Whose lower deviation is zero
Whose lower as well as upper deviations are zero
Does not exist
Copper
Mild steel
Aluminium
Zinc
Angular bevel gears
Mitre gears
Crown Bevel gears
Internal bevel gears
Uniform velocity
Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Torque in each shaft is the same
Shear stress in each shaft is the same
Angle of twist of each shaft is the same
Torsional stiffness of each shaft is the same
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
Effective length of column to least radius of gyration of the column
Width of column to depth of column
Maximum size of column to minimum size of column
Effective length of column to width of column
Less than
Equal to
More than
None of these
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the core diameter smaller than the diameter of the unthreaded portion
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
None of the above
(WD/ πd3) × K
(2WD/ πd3) × K
(4WD/ πd3) × K
(8WD/ πd3) × K
It is subjected to a higher cyclic loading than the outer side
It is subjected to a higher stress than the outer side
It is more stretched than the outer side during the manufacturing process
It has a lower curvature than the outer side
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
Joining thick cylinders
Calculating stresses in thick cylinders
Pre-stressing thick cylinders
Increasing the life of thick cylinders
0.33
0.4
0.5
0.55
Effect of temperature on belt
Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Stresses beyond elastic limit of belt material
Same
Double
One-half
One-fourth
Long column
Short column
Short and long column
Very long column
Butt weld
Fillet weld
Sleeve weld
Socket weld
Flat belt drive
V-belt drive
Crossed belt drive
Timing belt
0.75/ (0.75 + √v)
3/ (3 + v)
4.5/ (4.5 + v)
6/ (6 + v)
Mild steel
High speed steel
Stainless steel
Aluminium
A taper key which fits half in the key way of hub and half in the key way of shaft
A taper key which fits in a key way of the hub and is flat on the shaft
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only
Increases
Decreases
Remains constant
None of these
0.5 mm upto rivet diameter of 24 mm
1 mm for rivet diameter from 27 mm to 36 mm
2 mm for rivet diameter from 39 mm to 48 mm
All of the above
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
d/2
d/3
3d/4
d/4
Finishing and polishing
Shotpeening
De-carburisation
Electroplating
White metal
Silicon bronze
Monel metal
Phosphor bronze