Concrete Technology Sheet 13
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1) Question.
The diagonal tension which results in ultimate failure due to development of diagonal tension cracks, depends on
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2) Question.
Maximum strain at the level of compression steel for a rectangular section having effective cover to compression steel as 'd' and neutral axis depth from compression face as xu is
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3) Question.
In a reinforced concrete, pedestal is defined as a compression member, whose effective length does not exceed its least lateral dimension by
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4) Question.
In limit state design, the maximum limit imposed by IS: 456-1978 on the redeistribution of moments in staticaliy indeterminate beams is
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5) Question.
In limit state of design, the limiting value of depth of neutrai axis is
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6) Question.
In the limit state method, balanced design of a reinforced concrete beam gives
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7) Question.
Im limit state design, under-reinforced section is one in which
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8) Question.
Shape of idealized stress-strain curve for concrete as prescribed by IS : 456-1978 is
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9) Question.
In limit state design of concrete for flexure, the area of stress block is taken as where fck is characteristic compressive strength of concrete and xu is depth of neutral axis
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10) Question.
Design strength of concrete for limit state of collapse is taken as where fck is the characteristic coropressive strength of concrete and r is partial safety factor for concrete
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11) Question.
The importance of storing the various ingredients of concrete is -
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12) Question.
In voids method of determining the quantity of cement paste, it is assumed that the -
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13) Question.
The Indian standard code specifies that the crushing strength for which the mix should be designed in the laboratory should be.......times the strength actually required.
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14) Question.
The number of bags of cement required per cubic metre of 1:2:4 concrete will be approximately -
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15) Question.
If 50kg of fine aggregates and 100 kg of coarse aggregates are mixed in a concrete whose water-cement ratio is 0.6, the weight of water required for harsh mix is -
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16) Question.
In order to obtain the required workability, the minimum quantity of water to be added to fine and coarse aggregates is determined by the relation -
[ where W/C= Water-cement ratio, p= Quantity of cement by weight, y= Quantity of fine aggregate by weight, and z=Quantity of coarse aggregate by weight]
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17) Question.
The percentage of fine aggregate to the combined aggregate (P) is obtained by the relation -
[Where, X,Y and Z= Fineness modulii for coarse, fine and combined aggregates respectively]
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18) Question.
The factor which effects the design of concrete mix is -
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19) Question.
Which of the following proportion of different ingredients of concrete mix confirm to the arbitrary method of mixing -
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20) Question.
For reinforced cement concrete lintels and slabs, the nominal size of coarse aggregate should not exceed -
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