A cylindrical shell made of mild steel plate of 100 cm diameter is to be subject

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Question
A cylindrical shell made of mild steel plate of 100 cm diameter is to be subjected to an internal pressure of 10 kg/cm². If the material yields at 2000 kg/cm², assuming factor of safety as four and using maximum principal stress theory, thickness of the plate will be
Options
A. 5 mm
B. 10 mm
C. 15 mm
D. 20 mm

Correct Answer

10 mm

UPSC Civil Service Exam Questions problems

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1. A particle of mass 3 kg moving in a straight line decelerates uniformly from a speed of 40 m/s to 20 m/s in a distance of 300 m. Before it comes to rest, it will travel a further distance pf
Options
A. 10 m
B. 20 m
C. 50 m
D. 100 m

2. A locomotive has four pairs of driving wheels carrying an axle load of 24 x 10⁴ N. The maximum load that can be pulled if the coefficient of friction is 1/6, is
Options
A. 32 x 10⁴ N
B. 16 x 10⁴ N
C. 8 x 10⁴ N
D. 4 x 10⁴ N

3. Two simply supported beams B₁ and B₂ have spans l and 2l respectively. Beam B₁ has a cross-section of 1 x 1 units and beam B₂ has a cross-section of 2 x 2 units. These beams are subjected to concentrated loads W each at the centre of their spans. The ratio of the maximum flexural stress in these beams is
Options
A. 4
B. 2
C.
D.

4. A horizontal rod AB carries three loads of 3.0 kg, 7.0 kg and 10.0 kg at distances of 2.0 cm, 9.0 cm and 15 cm respectively from A where it is hinged. Neglecting the weight of the rod, which is the point at which the rod will be balance?
Options
A. 10.95 cm form A
B. 11.25 cm from A
C. 12.55 cm from A
D. 13.25 cm form A

5. Consider the following statements regarding Plane Table surveying :
1. It is less accurate than chain surveying.
2. It is not necessary to do accurate centering of plane table for small scale survey.
3. Compass rule may be made use for adjusting the plane table transverse.
4. From the instrument station, resectors are drawn to plot the position of object in the field.
Of these statements :
Options
A. 1, 2 and 4 are correct
B. 2, 3 and 4 are correct
C. 1, 2 and 3 are correct
D. 1, 3 and 4 are correct

7. Consider the following strengths of concrete :
1. Cube strength
2. Cylinder strength
3. Split-tensile strength
4. Modulus of rupture
The correct sequence in decreasing order of these strengths is
Options
A. 3, 4, 2, 1
B. 3, 4, 1, 2
C. 4, 3, 2, 1
D. 4, 3, 1, 2

8. The graphical condition for equilibrium of concurrent forces is that
Options
A. both the force polygon and the funicular polygon must be closed figures
B. funicular polygon should be a closed figure
C. force polygon need not be a closed figure
D. force polygon should be a closed figure

10. The plastic modulus of a section is 5 x 10^-4m³. Its shape factor is 1.2 and the plastic moment capacity is 120 kNm. What is the value of the yield stress of the material?
Options
A. 100 N/mm²
B. 200 N/mm²
C. 240 N/mm²
D. 288 N/mm²

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