A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ/2

2 τ

4 τ

τ

τ/2

2 τ

4 τ

τ

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Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

21

25

17

15

21

25

17

15

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Machine Design
Two shafts will have equal strength, if

Twisting moment of both the shafts is same

Material of both the shafts is same

Diameter of both the shafts is same

Angle of twist of both the shafts is same

Twisting moment of both the shafts is same

Material of both the shafts is same

Diameter of both the shafts is same

Angle of twist of both the shafts is same

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Machine Design
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

There are five rivets per pitch length, all in double shear

There are five rivets per pitch length, out of which four are in double shear and one is in single shear

There are four rivets per pitch length, out of which two are in single shear and two are in double shear

There are four rivets per pitch length, all in double shear

There are five rivets per pitch length, all in double shear

There are five rivets per pitch length, out of which four are in double shear and one is in single shear

There are four rivets per pitch length, out of which two are in single shear and two are in double shear

There are four rivets per pitch length, all in double shear

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension

7.2 N/mm² compression

3.6 N/mm² compression

3.6 N/mm² tension

7.2 N/mm² tension

7.2 N/mm² compression

3.6 N/mm² compression

3.6 N/mm² tension

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Machine Design
The spring mostly used in gramophones is

Helical spring

Conical spring

Volute spring

Flat spiral spring

Helical spring

Conical spring

Volute spring

Flat spiral spring

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Machine Design

Machine Design In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

Machine Design Two shafts will have equal strength, if

Machine Design A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

Machine Design A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

Machine Design The spring mostly used in gramophones is

Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

Machine Design
Two shafts will have equal strength, if

Machine Design
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

Machine Design
The spring mostly used in gramophones is