Effective
Smallest
Largest
None of these
A. Effective
90
60
120
100
T₁/T₂ = μθ × n
T₁/T₂ = (μθ)n
T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n
T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n
Is just sufficient to hold parts together
Approaches yield point
Is 50% of yield point
Is about yield point divided by safety factor
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
1/sinθ
1/cosθ
1/tanθ
sinθ cosθ
2μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)
4μ sinθ/(θ + sinθ)
4μ sinθ/(2θ + sin 2θ)
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
Helix angle
Pressure angle
Pitch lead angle
None of these
The oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease required to be applied after some intervals
Tensile stress
Compressive stress
Direct shear stress
Torsional shear stress
Lower critical temperature
Upper critical temperature
Recrystallisation temperature
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
Long column
Short column
Strut
All of these
Angular bevel gears
Mitre gears
Internal bevel gears
Crown bevel gears
The oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication
Whose upper deviation is zero
Whose lower deviation is zero
Whose lower as well as upper deviations are zero
Does not exist
Effective
Smallest
Largest
None of these
The Oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication
8
12
18
20
Muff coupling
Compression coupling
Flange coupling
All of these
Hexagonal nut
Slotted nut
Castle nut
Any one of the above
A parallel sunk key is a taperless key
A parallel sunk key may be rectangular or square in cross-section
A flat saddle key is a taper key which fits in a key way of the hub and is flat on the shaft
All of the above
ZN/p
p/ZN
Z/pN
N/Zp
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly is middle of nut and then slot reduced by tightening a screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
Only the broken belt is replaced
The entire set of belts is replaced
The broken belt and the belt on either side of it, is replaced
The broken belt need not to be replaced
Woodruff key
Feather key
Gib-head key
Tangent key
Along the axis of rotation
Parallel to the axis of rotation
Perpendicular to the axis of rotation
In any direction
0.20
0.35
0.50
0.65
Short bearing
Long bearing
Medium bearing
Square bearing
Compression
Tension
Shear
Combined loads