DHARM
N-GEO\OBJ.PM5 889OBJECTIVE QUESTIONS 889
- Factor of safety should be applied only to the net ultimate bearing capacity and not to
the surcharge pressure due to the depth of the foundation. True/False. - The safe bearing capacity values tabulated in building codes and codes of practice are
known as ............ bearing capacity values. - Fellenius’ method for bearing capacity assumes ............ failure surface.
- Terzaghi’s method for bearing capacity is an extension and an improved modification of
the method proposed by ............. - The value of Terzaghi’s bearing capacity factors depend only upon the value of .............
- For φ = 0° the Terzaghi bearing capacity factors are:
(a)Nc = 1, Nq = 5.7, Nγ = 0. (b)Nc = 0, Nq = 5.7, Nγ = 1.
(c)Nc = 5.7, Nq = 1, Nγ = 0. (d)Nc = 1, Nq = 0, Nγ = 5.7.- Terzaghi suggests that the parameters c′ and φ′ for local shear failure, in terms of c and
φ for general shear, as: ............ and ............. - Two footings, one circular and the other continuous, are founded at the same depth in a
pure clay. The diameter of the circular footing is the same as the width of the continu-
ous footing. The ratio of their net ultimate bearing capacities is ............. - Two footings, one circular and the other square, are founded in pure clay. The diameter
of the circular footing is the same as the side of the square footing. The ratio of their net
ultimate bearing capacities
(a) is unity.
(b) is 1.3.
(c) is 1/1.3.
(d) cannot be determined without some more data. - The benefit of surcharge or depth of foundation is only marginal in the case of footings
on purely cohesive soils. True/False - Two footings, one circular and the other continuous, are founded on the surface of a
purely cohesionless soil. The diameter of the circular footing is equal to the width of the
continuous footing. The ratio of their ultimate bearing capacities is ............. - Two footings, one square and the other continuous, are founded on the surface of a pure
cohesionless soil. The side of the square footing is equal to the width of the continuous
footing. The ratio of their ultimate bearing capacities is ............. - Two footings, one circular and the other square, are founded on the surface of a purely
cohesionless soil. The diameter of the circular footing in the same as that of the side of
the square footing. The ratio of their ultimate bearing capacities is
(a) unity. (b) 1.3.
(c) 4/3. (d) 3/4. - The bearing capacity of a footing in pure clay may be increased by increasing its size.
True/False - Two footings of the same size and shape are founded–one in loose and (ID = 15%) and the
other in dense sand (ID = 85%). The one founded in ............ sand will have greater bear-
ing capacity. This is because this sand will have greater .............