The maximum bending moment due to a train of wheel loads on a simply supported girder ____________.

1. Always occurs under a wheel load
2. Never occurs under a wheel load
3. Always occurs at centre of span
4. None

Muller-Breslau principle is used mainly to draw:

1. Bending moment diagrams
2. Shear force diagrams
3. Deflected shape only
4. Influence line diagrams

The fixed support in a real beam becomes in the conjugate beam a __________.

1. Hinged support
2. Roller support
3. Fixed support
4. Free end

Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is:

1. 3
2. 2
3. 6
4. 8

If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by:

1. m − r + 2j
2. m + r − 2j
3. m + r + 2j
4. m + r − 3j

In the displacement method of structural analysis, the basic unknowns are ____________.

1. Force
2. Displacements
3. Displacements and forces
4. None

Independent displacement components at each joint of a rigid-jointed plane frame are ____________.

1. Two linear movements and one rotation
2. Three linear movements
3. One linear movement and two rotations
4. Three rotations

The number of unknown internal forces in each member of a rigid-jointed plane frame is ____________.

1. 2
2. 1
3. 3
4. 6

The number of independent displacement components at each joint of a rigid-jointed space frame is ____________.

1. 1
2. 3
3. 2
4. 6

For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust ____________.

1. Is decreased
2. Remains unchanged
3. Is increased
4. Becomes zero

For a symmetrical two-hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust ____________.

1. Remains unchanged
2. Is decreased
3. Is increased
4. Becomes zero

The principle of virtual work can be applied to an elastic system by considering the virtual work of ____________.

1. External forces only
2. Internal forces only
3. Internal as well as external forces
4. None