MCQOPTIONS
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MCQOPTIONS
| 1. |
A cc slab of thickness 25 cm is constructed over a base of granular material with a modulus of reaction 8 kg/cm3. The maximum temperature differential between the top and bottom of the slab is found to be 20 C during summer day and night. The spacing between transverse joints is 4.5 m and the spacing between longitudinal joints is 3.5 m. The design wheel load is 5100 kg, radius of contact area is 15 cm, Poisson s ratio is 0.13, modulus of elasticity is 2 105 kg/cm2, the thermal coefficient is 10 10-6 / C and the coefficient of friction is 1.5. Using the above information, find the worst combination of stresses during mid-night. |
| A. | 16 kg/cm<sup>2</sup> |
| B. | 15.99 kg/cm<sup>2</sup> |
| C. | 16.99 kg/cm<sup>2</sup> |
| D. | 15 kg/cm<sup>2</sup> |
| Answer» D. 15 kg/cm<sup>2</sup> | |