ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 Under the elastic region, the deformation produced in the material, the deformation produced in the material will be permanent temporary either of them none of them
2 The greatest stress that a material can endure without losing the proportionality between stress and strain is called plastic line breaking point proportional limit none of them
3 In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as plastic limit plastic deformation proportional limit elastic behaviour
4 The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are 5 7 9 14
5 When the shear stress and shear stain are involved, then their ratio is called Young's modulus Bulk modulus Shear modulus all of them
6 In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called Young's modulus Bulk modulus Shear modulus all of them
7 The ratio of shearing stress/shearing strain is called as Modulus Pascal modulus Hooker's modulus Shear modulus
8 The ratio of linear stress/linear strain is called as Yong's modulus Bulk modulus Shear modulus Modulus
9 The units of modulus of elasticity are Nm<sup>-2</sup> Nm ms<sup>-1</sup> Pascal
10 The modulus of elasticity can be written as stress x strain strain/stress 1/2 x stress x strain stress/strain
11 Experiments revealed that the ratio of the stress to the strain is a constant value for different material all materials a given material all of them
12 The SI unit of strain is N Dynes Pascal Dimensionless
13 The measure of the deformation in a solid when stress is applied to its is called elastic constant young's modulus strain elasticity
14 When a stress changes the shape, it is called the compressional stress tensile stress shear stress any one of them
15 When a stress changes length, it is called the compressional stress tensile stress shear stress any one of them
16 The SI unit of stress is N/m<sup>2</sup> Nmc dynes/m N
17 The force applied on unit area to produce any change in the shape, volume or length of a body is known as strain elasticity stretching stress
18 The results of mechanical tests are usually expressed in terms of stress strain stress and strain neither strees nor strain
19 The ability of the body to return to its original shape is called deformation stretching compressing elasticity
20 The crystalline structure of NaCI is rectangular hexagonal tetrahedral cubical
21 The smallest three dimensional basic structure in a crystalline solid is called lattice point crystal lattice cubic crystal unit cell
22 Polymeric solids have low specific gravity high specific gravity either of them none of them
23 Synthetic materials fall into the category of crystalline solids amorphous polymeric solids all of them
24 On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost 600<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 7600<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 800<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 900<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C
25 Glass is an example of crystalline solid amorphous solid polymeric solid none of them
26 Amorphous solids are also called as crystalline solids polymeric solids glassy solids any one of them
27 Amorphous solids are also more like crystalline solids gases liquids any one of them
28 Every crystalline solid has definite melting point different melting points may or may not be definite none of them
29 The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict short range order long range order both of them none of them
30 In metallic crystals which of the following thing remains constant amplitude of oscillations temperature of solid average atomic positions all of them
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