1. Applying the static equations ∑H = 0, ∑V = 0 and ∑M = 0 to a determinate structure, we may determine
(a) supporting reactions only
(b) shear forces only
(c) bending moments only
(d) all the above*
Answer: For statically determinate structure, it is possible to determine support reactions. shear force and bending moment by using equations of static equilibrium.
2. The equivalent length of column of length L having both ends hinged is
(a) 2L
(b) L*
(c) L/2
(d) L/√2
Hint:
3. A fillet weld is termed as
(a) mitre weld
(b) concave weld
(c) convex weld
(d) all the above*
Hint: A gentle curve pointing away from the hypotenuse means a concave weld is required, a straight line parallel with the hypotenuse calls for a flat faced weld, and a gentle curve towards the hypotenuse calls for a convex weld.
(a) stillness
(b) proof resilience*
(c) proof stress
(d) proof load
Hint: Proof resilience is defined as the maximum energy that can be absorbed up to the elastic limit, without creating a permanent distortion.
5. The ratio ol moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base is
(a) 1.0
(b) 1.5
(c) 2.0
(d) 3.0*
Hint:
6. Flat spiral springs
(a) consist ol uniform thin strips
(b) are supported at outer end
(c) are wound by applying a torque
(d) all the above*
Hint: This type of spring consists of a uniform thin strip wound into a spiral in one plane, and pinned at its outer end. Winding of the spring is done by applying a torque to a spindle attached to the centre of the spiral.
7. The forces in the members of simple trusses, may be analysed by
(a) graphical method
(b) method of joints
(c) method of sections
(d) all the above*
8. The method of design of steel framework for greatest rigidity and economy in weight is known as
(a) simply design
(b) semi-rigid design
(c) fully rigid design*
(d) none of these
Hint:
- The method of design of steel framework for greatest rigidity and economy in weight is known as fully rigid design.
- In this method, the connections between the members are designed to be fully rigid, allowing for minimal movement or deformation under load.
- This results in a structure that is more stable and resistant to deflection, which can be particularly important in high-rise buildings or structures subject to heavy wind or seismic loads.
- The fully rigid design can also be more efficient in terms of material usage, as the stiffness of the connections allows for longer spans between supports and smaller member sizes.
- However, the design and fabrication of fully rigid connections can be more complex and expensive than other methods, and may require specialized engineering and construction expertise.
9. In plastic analysis, the shape factor for circular sections, is
(a) 1.5
(b) 1.6
(c) 1.697*
(d) none of these
Hint:
10. The main type of butt joints, is a double cover
(a) shear riveted joint
(b) chain riveted joint
(c) zig-zag riveted joint
(d) all the above*
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