1
GATE CE 2005
MCQ (Single Correct Answer)
+2
-0.6
A concrete beam of rectangular cross section of $$200\,\,mm \times 400\,\,mm$$ is pre-stressed with a force $$400$$ $$kN$$ at eccentricity $$100$$ $$mm.$$ the maximum compressive stress in the concrete is
A
$$12.5\,\,N/m{m^2}$$
B
$$7.5\,\,N/m{m^2}$$
C
$$5.0\,\,N/m{m^2}$$
D
$$2.5\,\,N/m{m^2}$$
2
GATE CE 2004
MCQ (Single Correct Answer)
+2
-0.6
A simply supported prestressed concrete beam is $$6$$ $$m$$ long and $$300$$ $$mm$$ wide. Its gross depth is $$600$$ $$mm.$$ It is prestressed by horizontal cable tendons at a uniform eccentricity of $$100$$ $$mm.$$ The prestressing tensile force in the cable tendons is $$1000$$ $$kN$$. Neglect the self weight of beam. The maximum normal compressive stress in the beam at transfer is
A
Zero
B
$$5.55\,\,N/m{m^2}$$
C
$$11.11\,\,N/m{m^2}$$
D
$$15.68\,\,N/m{m^2}$$
3
GATE CE 2003
MCQ (Single Correct Answer)
+2
-0.6
A concrete column carries an axial load of $$450$$ $$kN$$ and a bending moment of $$60$$ $$kN$$-$$m$$ at its base. An isolated footing of size $$2m \times 3m$$ side along the plane of the bending moment is provided under the column. Centers of gravity of column and footing coincide. The net maximum and the minimum pressures in $$kN/{m^2}$$ on soil under the footing are respectively.
A
$$95$$ and $$55$$
B
$$95$$ and $$75$$
C
$$75$$ and $$55$$
D
$$75$$ and $$75$$
4
GATE CE 1997
MCQ (Single Correct Answer)
+2
-0.6
A prestressed concrete rectangular beam of size $$300\,\,mm \times 900\,\,mm$$ is prestressed with an intial prestressing force of $$700$$ $$kN$$ at an eccentricity of $$350$$ $$mm$$ at midspan. Stress at top due to prestress alone, in $$N/m{m^2}$$ is
A
$$-3.46$$ (tension)
B
$$2.59$$ (compression)
C
zero
D
$$8.64$$ (compression)
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Fluid Mechanics and Hydraulic Machines
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