| 1. | Which of the following assumptions is INCORRECT about the long column ? | |
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The column behaves elastically
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The load acts perfectly axial and passes through the centroid of the column section
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The weight of the column is neglected
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The material is non-homogeneous and anisotropic
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Report Question| 2. | What is the maximum shear stress on the wall of a thin cylinder, if it has a diameter of d, thickness of t and the gauge pressure in the cylinder is p ? | |
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pd/t
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pd/4t
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pd/2t
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pd/8t
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| 3. | What is the volumetric strain in the thin cylinder subjected to internal pressure having hoop stress of 200 MPa, modulus of elasticity, E=200 GPa and poissons ratio=0.25 ? | |
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20/1000
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2/1000
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0.2/1000
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0.02/1000
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| 4. | The property of the material to regain its original shape after deformation when the external forces are removed is ________ ? | |
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plasticity
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elasticity
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durability
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None of these
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| 5. | A rod of dimension 20 mm x 20 mm is carrying an axial tensile load of 10 kN. The tensile stress developed is ________ ? | |
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0.025 MPa
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0.25 MPa
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25 MPa
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250 MPa
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| 6. | The triple point on a P-V diagram is ________ ? | |
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a line
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a point
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a triangle
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not present
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| 7. | Which of the following statement related to entropy is TRUE ? | |
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Minimum entropy is observed when the system is in equilibrium with the surrounding
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At absolute zero temperature, the solid solutions have non-zero entropy
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Substance in solid phase has the least entropy
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Entropy conservation takes place in all irreversible processes
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| 8. | If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________ ? | |
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0.33
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0.25
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0.2
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0.18
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| 9. | While working between temperatures 150 K and 300 K, the entropy change experienced by the Carnot engine during heat addition is 1 kJ/K, the work produced (kJ) by the engine is ________ ? | |
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100
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150
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300
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600
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| 10. | A heat engine working between the source at 200°C and rejects heat at 25°C receives 5 kW of heat. Work done for this engine is equal to 0 kW. Does this satisfy the inequality of Clausius ? | |
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Yes
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No
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Cannot be determined
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None of these
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