When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(8WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(WD/ πd3) × K

(8WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(WD/ πd3) × K

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Machine Design
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Sawn nut

Ring nut

Castle nut

Jam nut

Sawn nut

Ring nut

Castle nut

Jam nut

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Have variable bending moment (M) in each leaf

Permit each leaf to act as an overhanging beam

Obtain variable moment of inertia (I) in each leaf

Make M/I constant throughout the length of the leaf

Have variable bending moment (M) in each leaf

Permit each leaf to act as an overhanging beam

Obtain variable moment of inertia (I) in each leaf

Make M/I constant throughout the length of the leaf

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Machine Design
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

Increase

Decrease

Have same value as that of standard specimen

None of these

Increase

Decrease

Have same value as that of standard specimen

None of these

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Machine Design
When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be

2F/bh

3F/2bh

F/bh

4F/bh

2F/bh

3F/2bh

F/bh

4F/bh

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Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

180°

270°

360°

120°

180°

270°

360°

120°

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Machine Design

Machine Design A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Machine Design The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Machine Design If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

Machine Design When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be

Machine Design In a full journal bearing, the angle of contact of the bearing with the journal is

Machine Design
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Machine Design
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

Machine Design
When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be

Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is