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)

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

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Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

0.5 d

1.2 d

0.8 d

d

0.5 d

1.2 d

0.8 d

d

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Machine Design
The rivet head used for boiler plate riveting is usually

Conical head

Snap head

Pan Head

Counter sunk head

Conical head

Snap head

Pan Head

Counter sunk head

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Shaft B is better than shaft A

None of these

Shaft A is better than shaft B

Both the shafts are equally good

Shaft B is better than shaft A

None of these

Shaft A is better than shaft B

Both the shafts are equally good

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Machine Design
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Equating tearing resistance of the plate to the shearing resistance of the rivets

None of these

Equating tearing resistance of the plate to the crushing resistance of the rivets

Equating shearing resistance to the crushing resistance of the rivets

Equating tearing resistance of the plate to the shearing resistance of the rivets

None of these

Equating tearing resistance of the plate to the crushing resistance of the rivets

Equating shearing resistance to the crushing resistance of the rivets

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Butt joint with double cover plate

Any one of the above

Butt joint with single cover plate

Lap joint with one ring overlapping the other

Butt joint with double cover plate

Any one of the above

Butt joint with single cover plate

Lap joint with one ring overlapping the other

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Machine Design

Machine Design The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

Machine Design The rivet head used for boiler plate riveting is usually

Machine Design Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Machine Design According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Machine Design For longitudinal joint in boilers, the type of joint used is

Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

Machine Design
The rivet head used for boiler plate riveting is usually

Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Machine Design
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Machine Design
For longitudinal joint in boilers, the type of joint used is