For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
0.4 times
0.6 times
0.7 times
0.8 times
Correct Answer :
A. 0.4 times
Related Questions
The objective of crowning of the flat pulleys of belt drive is to
Prevent the belt from running off the pulley
Increase the power transmission capacity
Increase the belt velocity
Prevent the belt joint from damaging the belt surface
A bolt of M 24 × 2 means that
The pitch of the thread is 24 mm and depth is 2 mm
Cross-sectional area of the threads is 24 mm²
The nominal diameter of bolt is 24 mm and pitch is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called
Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing
Zero film bearing
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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
A leaf spring in automobiles is used
To apply forces
To measure forces
To absorb shocks
To store strain energy
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Cold working
Shot peening
Grinding and lapping surface
Hot working
Yield point in fatigue loading as compared to static loading is
Same
Higher
Lower
Depends on other factors
The shear stress at a point in a shaft subjected to a torque is
Directly proportional to the polar moment of inertia and to the distance of the point from the axis
Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
Directly proportional to the applied torque and the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia
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14 ½° composite and full depth involute system
20° full depth involute system
20° stub system
None of the above
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Wrought iron
Mild steel
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A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
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Castle nut
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When a close coiled helical spring is compressed, its wire is subjected to
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Shear
Compression
All of the above
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as
(Kf + 1)/ (Kt + 1)
(Kf - 1)/ (Kt - 1)
(Kt + 1)/ (Kf + 1)
(Kt - 1)/ (Kf - 1)
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Equal to
Less than
Greater than
None of these
A chain drive transmits __________ power as compared to belt drive.
More
Less
Same
None of these
An alien bolt is
Self locking bolt
Same as stud
Provided with hexagonal depression in head
Used in high speed components
Fibrous fracture occurs in
Ductile material
Brittle material
Elastic material
Hard material
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Gerber relation
Soderberg relation
Goodman relation
None of these
In a flange coupling, the bolts are subjected to
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Compressive stress
Shear stress
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2.5
2.8
3.0
3.5
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18
16
20
22
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Addendum circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × sinφ
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1
2
3
4
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Tensile stress
Compressive stress
Direct shear stress
Torsional shear stress
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Band and block brake
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Tight in both shaft and hub
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Compressive strength
Shear strength
Bending strength
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0.45
0.55
0.65
0.75
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Less
Same
More or less depending on quantum of load