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Browse complete papersA concrete batch has a total volume of 6m³. If the batch contains 36 bags of cement, and water added is 700 litres. Calculate the cement content of the mix in kg/m³.
300kg/m³
250kg/m³
150kg/m³
50kg/m³
Correct answer
300kg/m³
What is the modular ratio of concrete grade M30 when the effect of creep is NOT considered?
7.33
13.33
10.98
8.5
Correct answer
7.33
A steel column has a modulus of elasticity \( E = 2 \times 10^5 \text{ MPa} \) and a slenderness ratio (L/r)=100. Using Euler's formula for elastic buckling stress, determine the critical buckling stress \( \sigma_{cr} \) of the column.
98.7 MPa
197.4 MPa
39.5 MPa
78.9 MPa
Correct answer
98.7 MPa
A concrete mix is being designed for a characteristic compressive strength \( (f_{ck}) \) of 20 \( N/mm^2 \). According to IS 456 : 2000 guidelines, if the standard deviation for the production quality is assumed to be S = 4.0 \( N/mm^2 \), what is the required target mean compressive strength \( (f_m) \) for the mix design?
20 \( N/mm^2 \)
26.6 \( N/mm^2 \)
30 \( N/mm^2 \)
32 \( N/mm^2 \)
Correct answer
20 \( N/mm^2 \)
A steel column has an actual unsupported length of 3.6m. The column is fixed at one end and free at the other, and the radius of gyration of its cross-section is 30mm. Using the effective length method as per IS800 : 2007, determine the slenderness ratio of the column.
120
180
240
300
Correct answer
120
A built-up steel compression member is designed to carry a factored axial load of 1800kN. The member uses double lacing placed on two parallel planes, with each lacing bar inclined at 60° to the member’s longitudinal axis. As per design requirements, the lacing system must resist a total transverse shear equal to 2.5% of the axial load. If the shear force is shared equally between the two lacing planes, determine the axial force induced in each lacing bar.
13kN
18.8kN
26kN
37.5kN
Correct answer
13kN
A simply supported steel beam of plastic section has a plastic section modulus \( Z_p = 600 \times 10^3 mm^3 \). The yield stress of steel is \( f_y = 250 MPa \). The factored shear force acting on the beam is less than \( 0.6V_d \) Determine the design bending strength of the beam.
114kNm
136kNm
150kNm
170kNm
Correct answer
114kNm
A welded plate girder is subjected to major axis bending. The girder has an overall depth \( d = 1200 mm \) and web thickness \( t_w = 10 mm \). The girder carries a factored shear force of 900kN. As per IS 800 provisions, determine the design shear stress in the web using the shear area for welded sections.
60MPa
75MPa
90MPa
105MPa
Correct answer
60MPa
A rolled steel plate girder has a web depth \( d = 1500 mm \) and web thickness \( t_w = 12 mm \). The web is provided with transverse stiffeners. The buckling coefficient for the web panel is \( k_v = 6.0 \).
As per IS 800 provisions, determine whether shear buckling verification of the web is necessary.
Shear buckling check is not required
Shear buckling check is required
Shear buckling check is required only if kv > 7
Shear buckling check depends only on web thickness
Correct answer
Shear buckling check is not required
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then:
i) The ball will move to the front
ii) The bubble will move to the front
iii) The ball will move to the rear
iv) The bubble will move to the rear
Find out which of the above statements is correct?
(i)and(ii)
(i)and(iv)
(ii)and(iii)
(iii)and(iv)
Correct answer
(i)and(ii)