Equal to
Less than
Greater than
None of these
C. Greater than
0.2
0.25
0.50
0.6
Addendum circle
Dedendum circle
Pitch circle
Clearance circle
Heavier
Lighter
Moderate
None of these
1 in 5
1 in 10
1 in 24
1 in 40
Module
Tooth profile
Both module and pitch line velocity
Pitch line velocity
(Kf + 1)/ (Kt + 1)
(Kf - 1)/ (Kt - 1)
(Kt + 1)/ (Kf + 1)
(Kt - 1)/ (Kf - 1)
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 in middle of nut and then slot reduced by tightening 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 splitted and bent in reverse direction at the other end
σ [1 + (b/2a)]
σ [1 + (2a/b)]
σ [1 + (b/3a)]
σ [1 + (3a/b)]
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Its capability of storing energy
Its ability to absorb shocks
1100 to 1300°C
1300 to 1500°C
500 to 600°C
700 to 900°C
The distance from a point on one thread to the corresponding point on the next thread is called pitch
The distance which a screw thread advances axially in one rotation of the nut is called lead
In single start threads, lead is equal to pitch
All of the above
Open belt drive transmits more power than crossed belt drive
Crossed belt drive transmits more power than open belt drive
Open and crossed belt drives transmit same power
Power transmission does not depend upon open and crossed types of constructions
Hot piercing
Extrusion
Cold peening
Cold heading
Determining brittleness
Protecting metal against corrosion
Protecting metal against wear and tear
Experimental stress analysis
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
F/bh
3F/2bh
2F/bh
4F/bh
Low
High
Moderate
None of these
d
1.25 d
1.5 d
1.75 d
0.5 to 1
1 to 2
3 to 5
5 to 10
Pitch diameter
Inside diameter
Outside diameter
Height
10 to 20 %
20 to 30 %
30 to 40 %
40 to 50 %
Equal to
Less than
Greater than
None of these
Combined effect of transverse shear stress and bending stress in the wire
Combined effect of bending stress and curvature of the wire
Combined effect of transverse shear stress and curvature of wire
Combined effect of torsional shear stress and transverse shear stress in the wire
Cast iron
Wrought iron
Mild steel
Aluminium
The efficiency of a self locking screw can not be more than 50%
The efficiency of Acme (trapezoidal) thread is less than that of a square thread
If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
(A) and (B) Only
Very fine threads
High efficiency
Low efficiency
Strong teeth
Ring nut
Castle nut
Sawn nut
Jam nut
Straining
Fatigue
Creep
Sudden loading
14 ½° composite and full depth involute system
20° full depth involute system
20° stub system
None of the above
Direct tensile stress
Direct compressive stress
Direct bending stress
Direct shear stress