There are four rivets per pitch length, all in double shear
There are four rivets per pitch length, out of which two are in single shear and two are in double shear
There are five rivets per pitch length, all in double shear
There are five rivets per pitch length, out of which four are in double shear and one is in single shear
D. There are five rivets per pitch length, out of which four are in double shear and one is in single shear
Best method
Extremely hazardous
Has no effect as regards fatigue strength
Cheapest method
Low efficiency
High efficiency
High load lifting capacity
High mechanical advantage
F/bh
3F/2bh
2F/bh
4F/bh
124 d
138 d
151 d
168 d
Helical spring
Conical spring
Flat spiral spring
Volute spring
(Sum of base circle radii)/cosφ
(Difference of base circle radii)/cosφ
(Sum of pitch circle radii)/cosφ
(Difference of pitch circle radii)/cosφ
d
1.5 d
2.5 d
2 d
Increases markedly
Decreases markedly
Remain same
Depends on heat treatment carried out
(k₁ k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ + k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ - k₂)/ (k₁ k₂)
Parallel
Perpendicular
Both A and B
None of these
1/2
1/3
1/4
2/3
Compression
Tension
Shear
Combined loads
Very fine threads
High efficiency
Low efficiency
Strong teeth
2000-3000 kg/m²
3000-4000 kg/cm²
4000-4500 kg/cm²
7500-10,000 kg/cm²
8
4
2
6
Variations in load acting on a member
Variations in properties of materials in a member
Abrupt change of cross-section
All of these
Are lighter in weight
Offer silent operation
Can withstand shock loads
All of these
Brown colour
Yellow colour
White colour
Grey colour
Flat belt drive
V-belt drive
Crossed belt drive
Timing belt
Shoe brake
Band and block brake
Band brake
Internal expanding brake
One-fourth
One-third
One-half
Double
Joining thick cylinders
Calculating stresses in thick cylinders
Pre-stressing thick cylinders
Increasing the life of thick cylinders
8
6
4
2
10°
20°
30°
45°
Reducing stress concentration
Ease of manufacture
Safety
Fullering and caulking
Increase the key length
Increase the key depth
Increase the key width
Decrease the key length
(π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
3 × (π/4) d² × τ × n
0.124 - (0.684/T)
0.154 - (0.912/T)
0.175 - (0.841/T)
None of these
3 mm
6 mm
8 mm
12 mm
45°
60°
75°
90°