Civil Engineering MCQ Short Test- 4
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PWD, WRD, SSC, MPSC, ZP, नगरपरिषद, जलसंपदा, सरळसेवा परीक्षा साठी उपयुक्त
1➤ Efflorescence in cement is caused due to an excess of
ⓑ alkalis
ⓒ alumina
ⓓ iron oxide
2➤ Efflorescence of bricks is due to:
ⓑ high porosity of brick
ⓒ soluble salts present in the bricks
ⓓ excessive burning of bricks
3➤ When a brick is immersed in water for 24 hours and then dried, if
ⓑ 10 per cent surface is covered with grey or white deposits, the brick has slight efflorescence
ⓒ 50 per cent surface is covered with grey or white deposits, the brick has serious efflorescence
ⓓ All the above
4➤ Sea sand used in structures causes
ⓑ efflorescence
ⓒ dampness
ⓓ All of these
5➤ In order to prevent the entry of damp into a building, the course are provided are known as the ________ course.
ⓑ Corrosion proofing
ⓒ Water proofing
ⓓ Damp proofing
6➤ Due to ______________ the dampness finds its way to the floors through the substructure.
ⓑ Raising of moisture from ground
ⓒ Exposed tops of walls
ⓓ Condensation
7➤ Dampness causes
ⓑ crumbling of plaster
ⓒ bleaching of paints
ⓓ growth of termites
8➤ __________ absorbing water less than 4.50% of their weight can be used for Damp proofing
ⓑ Stones
ⓒ Mortar
ⓓ Cement concrete
9➤ A _________ layer is in proportion 1:2:4 is generally provided at the plinth level to work as a damp proofing course.
ⓑ Brick
ⓒ Cement concrete
ⓓ Stone
10➤ The sensitiveness of a level tube decreases if
ⓑ length of the vapour bubble is increased
ⓒ diameter of the tube is increased
ⓓ both viscosity and surface tension are increased.
11➤ For true difference in elevations between two points A and B, the level must be set up
ⓑ at the exact mid point of A and B
ⓒ near the point A D
ⓓ near the point A D. near the point B.
12➤ Pick up the correct statement from the following
ⓑ Gradiometer is used for setting out any required gradient
ⓒ Cross staff is used for setting out right angles
ⓓ all of the above
13➤ For the construction of highway (or railway)
ⓑ both longitudinal and cross sections are required
ⓒ cross sections are required
ⓓ none of these
14➤ If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.
ⓑ R/10
ⓒ R/25.
ⓓ R/20
15➤ The shape factor of standard rolled beam section varies from
ⓑ 1.30 to 1.40
ⓒ 1.20 to 1.30
ⓓ 1.40 to 1.50
16➤ The assumption in the theory of bending of beams, is
ⓑ material is homogeneous
ⓒ Young's modulus is same in tension as well as in compression
ⓓ all of the above
17➤ Shear strain energy theory for the failure of a material at elastic limit, is due to
ⓑ Rankine
ⓒ Guest or Trecas
ⓓ St. Venant
18➤ The point of contraflexure is the point where
ⓑ B.M. is maximum
ⓒ B.M. changes sign
ⓓ S.F. is zero.
19➤ The normal component of a force inclined through θ° is obtained by multiplying the force by
ⓑ cos θ
ⓒ tan θ
ⓓ sin θ cos θ
20➤ Total strain energy theory for the failure of a material at elastic limit, is known
ⓑ Haig's theory
ⓒ Guest's or Trecas' theory
ⓓ Von Mises's theory.
21➤ A pitot tube is used to measure
ⓑ difference in pressure
ⓒ velocity of flow
ⓓ none of these
22➤ The thickness of a sharp crested weir is kept less than
ⓑ two-third of the height of water on the sill
ⓒ one-fourth of the height of water on the sill
ⓓ one-half of the height of water on the sill
23➤ The maximum vacuum created at the summit of a syphon is
ⓑ 7.4 m of water
ⓒ 5.5 m of water
ⓓ none
24➤ If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its
ⓑ specific weight
ⓒ specific gravity
ⓓ none of these.
25➤ A syphon is used
ⓑ to supply water to a town from higher level to lower level
ⓒ to fill up a tank with water at higher level from a lower level
ⓓ none of these
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Civil Engineering Short Test click Here
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