On an immersed body in a flowing fluid the lift force is : due to buoyant force

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Question
On an immersed body in a flowing fluid the lift force is :
Options
A. due to buoyant force
B. always in the opposite direction to gravity
C. due to Wake phenomenon
D. the dynamic fluid-force component normal to approach velocity

Correct Answer

always in the opposite direction to gravity

GATE Exam Questions problems

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1. The toughness index of clayey soils is given by
Options
A. Plasticity index/Flow index
B. Liquid limit/Plastic limit
C. Liquidity index/Plastic limit
D. Plastic limit/Liquidity index

3. When a retaining wall moves away from the backfill, the pressure exerted on the wall is termed as
Options
A. passive earth pressure
B. swelling pressure
C. pore pressure
D. active earth pressure

4. A mild steel specimen is under uni-axial tensile stress. Young's modulus and yield stress for mild steel are 2 x 10⁵ MPa and 250 MPa respectively. The maximum amount of strain energy per unit volume that can be stored in this speciment without permanent set, is
Options
A. 156 Nmm/mm³
B. 15.6 Nmm/mm³
C. 1.56 Nmm/mm³
D. 0.156 Nmm/mm³

5. A two lane single carriage-way is to be designed for a design life period of 15 years. Total two-way traffic intensity in the year of completion of construction is expected to be 2000 commercial vehicles per day. Vehicle damage factor = 3.0, Lane distribution factor = 0.75. Assuming an annual rate of traffic growth as 7.5%, the design traffic expressed as cumulative number of standard axles, is
Options
A. 42.9 x 10⁶
B. 22.6 x 10⁶
C. 10.1 x 10⁶
D. 5.3 x 10⁶

6. Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is same as that of the side of the square footing. The ratio of their ultimate bearing capcities is
Options
A. 3/4
B. 4/3
C. 1.0
D. 1.3

8. Rivets and bolts subjected to both shear stress (?_{vf , cal}) and axial tensile stress (?_{tf , cal}) shall be so proportioned that the stresses do not exceed the respective allowable stresses ?_vf and ?_tf and the value of exceed does not exceed
Options
A. 1.0
B. 1.2
C. 1.4
D. 1.8

9. Compaction by vibratory roller is the best method of compaction in case of
Options
A. moist silty sand
B. well graded dry sand
C. clay of medium compressibility
D. silt of high compressibility

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