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

(4WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(2WD/ πd3) × K

(4WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.5

2.8

3.0

3.5

2.5

2.8

3.0

3.5

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Factor of safety for fatigue loading is the ratio of

Young's modulus to the ultimate tensile strength

Elastic limit to the working stress

Endurance limit to the working stress

Elastic limit to the yield point

Young's modulus to the ultimate tensile strength

Elastic limit to the working stress

Endurance limit to the working stress

Elastic limit to the yield point

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

W/2A

W/A

3W/A

2W/A

W/2A

W/A

3W/A

2W/A

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Addendum circle diameter × cosφ

Pitch circle diameter × sinφ

Clearance circle diameter × cosφ

Pitch circle diameter × cosφ

Addendum circle diameter × cosφ

Pitch circle diameter × sinφ

Clearance circle diameter × cosφ

Pitch circle diameter × cosφ

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the speed of belt increases,

The coefficient of friction between the belt and pulley decreases

The power transmitted will increase

The power transmitted will decrease

The coefficient of friction between the belt and pulley increases

The coefficient of friction between the belt and pulley decreases

The power transmitted will increase

The power transmitted will decrease

The coefficient of friction between the belt and pulley increases

ANSWER DOWNLOAD EXAMIANS APP

Machine Design

Machine Design Factor of safety for fatigue loading is the ratio of

Machine Design When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

Machine Design The dedendum circle diameter is equal to (where φ = Pressure angle)

Machine Design When the speed of belt increases,

Machine Design
Factor of safety for fatigue loading is the ratio of

Machine Design
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Machine Design
When the speed of belt increases,