1. In which case are trussed portals preferred over simple portals?
a) When they are used to span small distances
b) When they are used to span large distances
c) When they are used to span small loads
d) When they are used to span heavy loads
Explanation: In large distances, girders are replaced by trusses as they provide some extra advantages.
2. A building bent deflects in the way same as a:-
a) Cantilever beam
b) Fixed beam
c) Truss system
d) Portal frame
Explanation: There too, we assume inflection points a centre of columns.
3. What the relation between shear carried by interior and exterior columns of a bent?
a) Interior is double of exterior
b) Exterior is double of interior
c) Both carry same shear
d) Depends upon magnitude of load carried
Explanation: We assume that each column is a member of portal frames, then interior columns will be a superposition of two portal frames and it will carry twice the shear
4. How many assumptions are made in portal method for analyzing fixed-supported building?
a) 1
b) 2
c) 3
d) 4
Explanation: It is similar to analyzing a fixed supported portal frame.
5. Portal method is more suitable for building having:-
a) High elevation
b) Low elevation
c) Medium elevation
d) Elevation don’t matter
Explanation: On comparing with more exact indeterminate analysis, portal method is more suitable for lower elevation.
6. Portal method is suitable for non-uniformly framed buildings.
a) True
b) False
Explanation: It is suitable for uniformly framed buildings due to structure’s action under load.
7. Where is inflection point in girder assumed in building fames while using portal method?
a) At one of the end points
b) At both of the end points
c) At centre of each girder
d) No point is assumed
Explanation: It works in the same way as analysis of a portal frame.
8. Cantilever method is based upon same action as a long cantilever beam subjected to a :-
a) Transverse load
b) Axial load
c) Moment
d) No load
Explanation: Cantilever method is based upon same action as a long cantilever beam subjected to a transverse load.
9. Axial force in column is always tensile.
a) True
b) False
Explanation: Axial column in column is tensile on one side of the neutral axis and compressive on other side of neutral axis.
10. How does axial stress vary from neutral axis?
a) Parabolically
b) Hyperbolically
c) Linearly
d) Arbitrarily
Explanation: Just like in a cantilever beam, axial stress has a linear variation from neutral axis.