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)

(2WD/ πd3) × K

(WD/ πd3) × K

(8WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(WD/ πd3) × K

(8WD/ πd3) × K

(4WD/ πd3) × K

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Machine Design
When the fulcrum is in between the load and effort, the lever is said to be of

Third type

First type

Any one of these

Second type

Third type

First type

Any one of these

Second type

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Machine Design
A self locking screw has

Hole for inserting split pin

Course threads

Coefficient of friction is greater than tangent of load angle

Fine threads

Hole for inserting split pin

Course threads

Coefficient of friction is greater than tangent of load angle

Fine threads

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Machine Design
In skew bevel gearing, the axes of shafts are

Intersecting and the teeth are curved

None of these

Non-intersecting and non-parallel and the teeth are straight

Non-intersecting and nonparallel and the teeth are curved

Intersecting and the teeth are curved

None of these

Non-intersecting and non-parallel and the teeth are straight

Non-intersecting and nonparallel and the teeth are curved

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Machine Design
In hydrodynamic bearings

The oil film is maintained by supplying oil under pressure

The oil film pressure is generated only by the rotation of the journal

Grease is used for lubrication

Do not require external supply of lubricant

The oil film is maintained by supplying oil under pressure

The oil film pressure is generated only by the rotation of the journal

Grease is used for lubrication

Do not require external supply of lubricant

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Machine Design
In levers, leverage is the ratio of

Mechanical advantage to the velocity ratio

Effort arm to the load arm

Load arm to the effort arm

Load lifted to the effort applied

Mechanical advantage to the velocity ratio

Effort arm to the load arm

Load arm to the effort arm

Load lifted to the effort applied

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Machine Design

Machine Design When the fulcrum is in between the load and effort, the lever is said to be of

Machine Design A self locking screw has

Machine Design In skew bevel gearing, the axes of shafts are

Machine Design In hydrodynamic bearings

Machine Design In levers, leverage is the ratio of

Machine Design
When the fulcrum is in between the load and effort, the lever is said to be of

Machine Design
A self locking screw has

Machine Design
In skew bevel gearing, the axes of shafts are

Machine Design
In hydrodynamic bearings

Machine Design
In levers, leverage is the ratio of