Showing posts with label Civil Engineering. Show all posts
Showing posts with label Civil Engineering. Show all posts

Building Materials Exams Important Topics

Exams Important Topics for Building Materials

  1. The sedimentary rocks are formed due to : gradual deposition of materials like sand, clay, etc., generally by setting water
  2. The rocks formed due to solidification of molten mass laying below or above the earth surface are called: Igneous Rocks
  3. The rocks formed due to alteration of original structure under heat and excessive pressure are called: Metamorphic Rocks
  4. Igneous rock has: Crystalline, glossy and fused textures
  5. Granite is an example of: Igneous Rock
  6. Laterite is chemically classified as: Argillaceous Rock
  7. Gneiss is chemically classified as: Siliceous Rock
  8. The main constituent of calcareous rock is: Lime or Calcium Carbonate
  9. Examples of Siliceous Rocks: Granite, Quartzite, Gneiss
  10. Examples of Argillceous Rocks: Laterite, Slate, Kaoline
  11. Examples of Calcreous Rocks: Limestone , Marble
  12. Examples of stratified rocks: Limesone, Slate, Sand Stone
  13. Examples of unstratified rocks: Granite, Marble
  14. A decomposed laterite that has deep brown or red colour: Moorum
  15. Limestone is physically classified as: Stratified Rock
  16. Slate in the for of tiles is used for: Excellent Roof Covering Material
  17. Marble is an example of : Metamorphic Rock
  18. Sandstone consists of: Quartz, Silica and Lime
  19. Granite is mainly composed of: Quartz, Felspar and Mica
  20. Gneiss is mainly composed of: Quartz and Felspar
  21. Slate is composed of:  Alumina mixed with sand or carbonate of lime
  22. A siliceous sandstone which has been subjected to metamorphic action: Quartzite
  23. Marble is mainy composed of: Silica and Lime
  24. In order to dry the quarry sap of freshly carried stone, it should be exposed t open air for a period of: six to twelve months
  25. The compressive strength of granite is: 70 to 130 M Newton per Meter Square
  26. The compressive strength of slate is: 60 to 70 M Newton per Meter Square
  27. The compressive strength of Sandstone is: 35 to 40 M Newton per Meter Square
  28. A good building stone is one which does not absorb more tha: 5% of it's weight of water after one day's immersion.
  29. A stone with large percentage of Quartz is: Very Soft
  30. The specific gravity of stone, in any case, should not be less than: 2.5
  31. Major constituent of siliceous rock is: Silica
  32. Major constituent of Argillaceous rock is: Clay or Alumina
  33. Major constituent of Calcareous rock is: Calcium or Lime
  34. The colour of Granite is: Grey, Green, Brown, Pink
  35. The colour of Slate is: Grey or Dark Blue
  36. The colour of sandstone is: White, Grey, Brown, Pink etc.
  37. The colour of Limestone is: Brown, Yellow and Dark Grey
  38. The colour of Moorum is: Deep Brown or Red
  39. A fine grained granite: Offers high resistance to weathering
  40. A fine grained granite: Can be easily polished and worked
  41. A fine grained granite: is used for exterior facing of buildings
  42. A Limestone containing about 30% of Alumina and Silica is called: Kankar
  43. A Limestone found in seams of great thickness in non crystalline texture with earthy appearance is called: Compact Limestone
  44. The specific gravity of Granite is:  2.64
  45. The specific gravity of Slate is: 2.8
  46. The specific gravity of Sandstone is: 2.65 to 2.95
  47. The specific gravity of Limestone is: 2.6
  48. The specific gravity of Marble is: 2.7
  49. The specific gravity of Laterite is: 2 to 2.2
  50. For Railway ballast, the stone should be: Hard, Dense, Durable, Tough and easily workable
  51. When quarrying is to be done in hard stone and compact rocks, the usual methods of quarrying is: Blasting
  52. The quarrying of stone by the method of wedging is successfully carried out in: Sandstones, Limestones, Marbles etc.
  53. The compressive strength of Felspar is: More than Quartz
  54. Gun cotton is made by saturating cotton with: Nitric Acid
  55. The most powerful explosive used in blasting is: Gun Cotton
  56. The dressing of stone is done: Immediately after Quarrying
  57. For the construction of retaining walls, the stone used must be: Heavy
  58. The crushing strength of stone depends upon its: Texture and Specific Gravity
  59. The stone used for the construction of curved or ornamental work should be: Soft
  60. The attrton test in the stone is performed: for determining the rate of wear of stone due to grinding action under traffic
  61. The brick earth is derived by the disintegration of: Igneous Rocks
  62. A first class brick should not absorb water more than: 20% of its own dry weight after 24 hours immersion in cold water.
  63. A second class brick should not absorb water more than: 22% of its own dry weight after 24 hours immersion in cold water.
  64. A third class brick should not absorb water more than: 25% of its own dry weight after 24 hours immersion in cold water.
  65. The principal constituent of every kind of brick earth is: Alumina
  66. The percentage of Alumina in good brick earth: 20% to 30%
  67. The percentage of Silica in good brick earth: 50% to 60%
  68. A first class brick should have a minimum crushing strength of: 10.5 MN per Meter Square
  69. A second class brick should have a minimum crushing strength of: 7.5 MN per Meter Square
  70. A third class brick should have a minimum crushing strength of: 5.5 MN per Meter Square
  71. A perforated brick should have a minimum crushing strength of: 7 MN per Meter Square
  72. Excess of Alumina in clay: Makes the brick crack and warp on drying
  73. Excess of Silica in clay: Makes the brick brittle and Weak
  74. Excess of Lime in clay: Causes the bricks to melt and distort during burning
  75. Presence of Alkaline Salt: Absorbs moisture from the air which on drying leaves high powder deposit on the bricks
  76. The colour of bricks depends upon: the amount of iron oxide present in the clay
  77. The specific gravity of bricks is about: 2
  78. The standard size of bricks are: 19 cm x 9 cm x 9 cm
  79. The standard size of brick tiles are: 19 cm x 9 cm x 4 cm
  80. The number of bricks required for one cubic meter of brick masonry are: 550
  81. The size of mould for bricks should be: larger than the specified size of bricks
  82. The alkaline salt present in the bricks causes: Effloescence
  83. If clay containing pyrite is used to make brick, it causes: Efflorescence in brick
  84. If water containing Gypsum is used for pugging clay, it causes: Efflorescence 
  85. The good clay for making bricks is: Weathered Clay
  86. For facing purposes, the hand made bricks are: Superior to machine made bricks
  87. The process of mixing clay, water and other ingredients to make bricks, is known as: Kneading
  88. The process in which the earth is dug out and is left to atmospheric action for few weeks, is known as: Weathering
  89. The burning of bricks in kilns is complete within: 24 Hrs
  90. The bricks after burning in kilns require about: 12 days to cool down for unloading
  91. The temperature on which the brick should be burnt ranges between: 1000 to 1200 Degree Celsius
  92. The bricks after moulding should be dried in: air for 3 to  days but not in sun
  93. The indentation marks left on bricks during the process of moulding, are known as: Frogs
  94. The natural drying of bricks is also called: Hack Drying
  95. The frog of a brick is normally made on its: Top Face
  96. The type of brick suitable for panal walls for multi storeyed buildings is: Hollow Bricks and Perforated Bricks
  97. The average out turn of first class bricks in clamp burning is: 60%
  98. The average out turn of second class bricks in kiln burning is: 80% to 90%
  99. Jhama bricks are: Over burnt with irregular shape
  100. The earth required for the moulding of 1000 bricks is about: 1.5 to 2.5 cum
  101. Bricks used in construction of acute and obtuse squint quoins: Squint Bricks
  102. The bricks used for street pavements, stable floors, garden walls: Paving Bricks
  103. The bricks used for circular pillars: Round Bricks
  104. The bricks capable of withstanding high temperature and low coefficient of expansion and contraction: Refractory Bricks
  105. Classification of Refractory Bricks: Acid Bricks, Basic Bricks, Neutral Bricks
  106. Classification of Acid Bricks: Fire Bricks and Silica Bricks
  107. Classification of Basic Refractory Bricks: Magnesite Bricks, Dolomite Bricks, Bauxite Bricks
  108. Classification of Neutral Refractory Bricks: Chrome Bricks, Chrome Magnesite Bricks and Spinel Bricks

Strength of Materials Questions For Competitive Exams

Strength of Materials Strength of Materials Questions For Competitive Exams

U.P.S.C., S.S.C., I.A.S., B.Sc. Engineering, Diploma and various interviews

  1. The unit of stress in S.I. units is: N/mm square, KN/mm square, N/meter square
  2. Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation is called: Stress
  3. The unit of strain is: No unit
  4. The deformation per unit length is called: Strain
  5. When a body is subjected to two equal and opposite pushes, as a result of which the body tends to  reduce its length, the stress and strain induced is: compressive
  6. Strain is equal to Change in Length / Actual Length
  7. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is: Shear Stress, Shear Strain
  8. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend in length, the stress and strain induced is: Tensile Stress, Tensile Strain
  9. Hooks law holds good up to Elastic Limit
  10. Proportional Limit, Elastic Limit, Yielding and thereafter Failure
  11. The ratio of linear stress to linear strain: Modulus of Elasticity
  12. The ratio of shear stress to shear strain: Modulus of Rigidity
  13. The unit of modulus of elasticity is same as those of Pressure, Stress, Modulus of Rigidity
  14. Whenever a material is loaded within elastic limit, stress is: directly proportional to strain
  15. When a change in length takes place, the strain is known as Linear Strain
  16. The modulus of elasticity for Mild Steel is approximately equal to 210 KN/mm square
  17. The change in length due to a tensile or compressive force acting on a body is given by PL/AE, where, P is Tensile or compressive force acting on the body, L is original length of the body, A is Cross-Sectional Area of the body,E is Young's modulus of the material of the body
  18. The unit of Young's Modulus is same as that of Stress
  19. Young's Modulus may be defined as the ratio of Linear Stress to Linear Strain
  20. Modulus of Rigidity may be defined as the ratio of: Shear Stress to Shear Strain
  21. Two bars of different materials and same size are subjected to same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be: 5:2
  22. The deformation of a bar under its own weight is: half the deformation if the same body is subjected to direct load equal to the weight of the body.
  23. When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is: w*l square / 2E where W is weight per unit volume of the bar
  24. The length of a conical bar is l, the diameter of the base is d and weight per unit volume is w. It is fixed at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be: w*l square/ 6E
  25. The elongation of a conical bar under its own weight is: one-third that of the prismatic bar of the same length.
  26. Strain rosettes are used to: Measure linear strain
  27. The extension of a circular bar tapering uniformly from diameter d1 at one end to the diameter d2 at the other end, and subjected to an axial pull of P is given by: 4*P*l / pie*E* d1*d2 
  28. The extension of a circular bar tapering uniformly from diameter d1 at one end to the diameter d2 at the other end, and subjected to an axial pull of P is: equal to the extension of a circular bar of diameter 'root under d1*d2' subjected to the same load P.
  29. A bar of length L metres extend by l mm under a tensile force of P, the strain produced in the bar is: 0.001l / L
  30. The ultimate tensile stress of Mild Steel is:  More than the ultimate compressive stress
  31. The shear modulus of most materials with respect to the modulus of elasticity: is less than half
  32. The maximum stress produced in a bar of tapering section is at: Smaller End
  33. A bolt is made a pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then: bolt is under tension and tube is under compression
  34. A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then: both rod and tube are under compression
  35. A steel bar of 5 mm is heated from 15-degree celsius to 40-degree Celsius and it is free to expand. The bar will induce: No Stress
  36. When a bar is subjected to a change of temperature and its deformation is prevented, the stress induces in the bar is: Thermal Stress