Group I contains representative stress-strain curves as shown in the figure, while Group II gives the list of materials. Match the stress-strain curves with the corresponding materials.
The first moment of area about the axis of bending for a beam cross-section is
Section modulus, z = I/r = A.r.r/r = A.r i.e. Moment of Area
Polar moment of inertia (Ip), in cm4, of a rectangular section having width, b = 2 cm and depth, d = 6 cm is ________________
Polar moment of inertia = Moment of Inertia about XX axis + YY axis. = bd3/12 + db3/12 = 2*6*6*6/12 + 6*2*2*2/11 = 40
The target mean strength fcm for concrete mix design obtained from the characteristic strength fck and standard deviation σ, as defined in IS:456-2000, is
Fcm = fck + 1.35 σ ( According to IS 456:2000)
The flexural tensile strength of M25 grade of concrete, in N/mm2, as per IS:456-2000 is __________
Flexural tensile strength of M25 grade of concrete, Fcr = 0.7*(fck)^0.5 = 0.7 * (25)^0.5 = 3.5 N/mm2
The modulus of elasticity, E = 5000 fck^0.5 where fck is the characteristic compressive strength of concrete, specified in IS:456-2000 is based on
The modulus of elasticity, E = 5000 fck^0.5 is based on initial tangent modulus
The static indeterminacy of the two-span continuous beam with an internal hinge, shown below, is ______________
Dg = 3m+r-3j-r, m = no. of members = 4, r = no. of external reactions = 4, j = no. of joints = 5, r = no. of reactions released = 2-1 = 1 So, Dg = 3*4 +4 -3*5 -1 = 0
As per Indian Standard Soil Classification System (IS: 1498 - 1970), an expression for A-line is
As per Indian Standard Soil Classification System (IS: 1498 - 1970), an expression for A-line is Ip = 0.73 (wL - 20)
The clay mineral primarily governing the swelling behavior of Black Cotton soil is
The clay mineral primarily governing the swelling behavior of Black Cotton soil is Montmorillonite
The contact pressure for a rigid footing resting on clay at the centre and the edges are respectively
The contact pressure for a rigid footing resting on clay at the centre and the edges are respectively minimum and maximum
A certain soil has the following properties: Gs = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is _________
Gs = 2.71, n = 40% = 0.40, W = 20%, S = ? e = n/(1-n) = 0.40/0.60 = 0.67, S = WG/e = 0.20*2.71/0.67 = 0.808 = 81%
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