The length of a column which gives the same value of buckling load by Euler and

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The length of a column which gives the same value of buckling load by Euler and Rankine-Gordon formula, is equal to
Options
A.
B.
C.
D. none of these.

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4. In rectangular columns (cross-section b x h), the core is a
Options
A. rectangle of lengths b/2 and h/2
B. square of length b/2
C. rhombus of length h/2
D. rhombus of diagonals b/3 and h/3
E. none of the these.

5. A three hinged parabolic arch hinged at the crown and springings, has a horizontal span of 4.8 m and a central rise of 1 m. It carries a uniformly distributed load of 0.75 tonne per metre over half left hand span. The horizontal thrust at the support will be
Options
A. 10.8 tonnes
B. 1.08 tonnes
C. 1.8 tonnes
D. 0.8 tonnes
E. none of these.

6. The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm², the permissible maximum crippling load will be
Options
A. 1.288 tonnes
B. 12.88
C. 128.8 tonnes
D. 288.0
E. none of these.

7. A bending moment may be defined as :
Options
A. Arithmetic sum of the moments of all the forces on either side of the section
B. Arithmetic sum of the forces on either side of the section
C. Algebraic sum of the moments of all the forces on either side of the section
D. None of these.

10. An arch with three hinges, is a structure
Options
A. statically determinate
B. statically indeterminate
C. geometrically unstable
D. structurally sound but indeterminate
E. none of these.

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