A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2000 N-m

2050 N-m

2100 N-m

2136 N-m

2000 N-m

2050 N-m

2100 N-m

2136 N-m

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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)

(WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

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Machine Design
The anti-friction bearings

Can carry both radial and thrust loads

All of these

Have low starting and low running friction at moderate speeds

Have high initial cost

Can carry both radial and thrust loads

All of these

Have low starting and low running friction at moderate speeds

Have high initial cost

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A combination of bending stress and direct shear stress

Direct shear stress only

A combination of torsional shear stress and bending

Bending stress only

A combination of bending stress and direct shear stress

Direct shear stress only

A combination of torsional shear stress and bending

Bending stress only

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Machine Design
A stud

Has pointed threads

Has both the ends threaded

Has a head on one end and a nut fitted to the other

Has head at one end and other end fits into a tapped hole in the other part to be joined

Has pointed threads

Has both the ends threaded

Has a head on one end and a nut fitted to the other

Has head at one end and other end fits into a tapped hole in the other part to be joined

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Machine Design
The V-belts are particularly suitable for __________ drives.

Both A and B

Long

None of these

Short

Both A and B

Long

None of these

Short

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Machine Design

Machine Design The anti-friction bearings

Machine Design When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

Machine Design A stud

Machine Design The V-belts are particularly suitable for __________ drives.

Machine Design
The anti-friction bearings

Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

Machine Design
A stud

Machine Design
The V-belts are particularly suitable for __________ drives.