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UPSC Civil Service Exam Questions problems

2. Which of the following factors are associated with the behaviour of sand mass during earthquake to cause liquefaction?
1. Number of stress cycles
2. The frequency, and amplitude of vibration of waves generated by an earthquake
3. Characteristics of sand
4. Relative density
Select the correct answer using the codes given below :
Options
A. 1, 2 and 3
B. 1, 2, 3 and 4
C. 2 and 4
D. 3 and 4

4. 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

5. 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

6. 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.

7. 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

8. 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

9. 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

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