Soil Mechanics and Foundation Engineering (General Engineering) (SSC JE)

Total Questions: 50

41. The maximum total settlement for isolated foundations on clayey soils should be limited to [BPSC AE (GEN. ENGG.)-29.03.2019 ]

Correct Answer: (c) 65 mm
Solution:

Settlement–In weak soil or at the side of excessive loading, settlement is more, which causes different settlement which is more vulnerable. Even when less, differential settlement creates crack on the wall. Slopes of bathroom floors, water flow in effluent pipe etc.
Permissible settlement in shallow foundation

42. The property of sand due to which it evolves a great amount of steam and other gases is called: [RRB JE (Muzaffarpur) 14.12.2014 ]

Correct Answer: (b) permeability
Solution:

The property of sand due to which it evolves a great amount of steam and other gases is called permeability.
• Permeability is defined as the property of a porous material which permit the posses or seepage of water (or other fluid) through its interconnecting void.

43. A pile foundation is used when: [RRB JE (Chennai) 14.12.2014 ]

Correct Answer: (c) both (a) and (b)
Solution:

Necessity of pile foundation–
• When the strata at as just below the ground surface is highly compressible and very week to support the load transmitted by the structure.
• Pile foundation are required for the transmission of the structure loads through a deep wales to a firm stratum.
• Piles are used for the foundation of some structure, such as transmission tower, off-shore platforms which are subjected to uplift.
• In case of expansive soil.
• In case of collapsible soil.
• When load are heavy.

44. Solve the following question. [RRB JE (Bilaspur/Kolkata/Mumbai/Guwahati)-14.12.2014 ]

Correct Answer: (b)
Solution:

 

45. Which of the following soils has more plasticity index? [RRB JE 26.08.2015 (Shift-III) ]

Correct Answer: (c) Clay
Solution:

• Clay soil have more plasticity index than sand silt & gravel. This is because clay particles are much smaller in size than sand silt as gravel particle.
• The range of consistency within which a soil exhibits plastic property is called plastic range and is indicate by plasticity index.

46. Number of phases in soil mass is– [RRB JE 26.08.2015 (Shift-III) ]

Correct Answer: (a) 3
Solution:

47. A fully saturated soil is said to be– [RRB JE 26.08.2015 (Shift-I) ]

Correct Answer: (c) Two phase system with soil and water
Solution:

A fully saturated soil is said to be two phase system with soil and water

48. Water content of soil can be– [RRB JE 26.08.2015 (Shift-II) ]

Correct Answer: (a) Greater than 100%
Solution:

Water content– The water content (w), also known as natural water content or natural moisture content, is the ratio of the weight of water to the weight of the solids in a given mass of soil. This ratio is usually expressed as percentage. When voids are completely filled with air, water content is equal to zero (dry soil).
There is no upper limit for it.
• Water content of soil can be greater than 100%.

49. Voids ratio of a soil mass can– [RRB JE 26.08.2015 (Shift-II) ]

Correct Answer: (c) Take any value greater than zero
Solution:

Void ratio– • Void ratio of a given soil sample is the ratio of the volume of voids to the volume of soil solid in the given soil mass.

50. The stokes equation used for determination of settling velocity of discrete particle is– [RRB JE 26.08.2015 (Shift-II) ]

Correct Answer: (a)
Solution: