Standard 5-day BOD of a waste water sample is nearly x% of the ultimate BOD, whe

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Question
Standard 5-day BOD of a waste water sample is nearly x% of the ultimate BOD, where x is
Options
A. 48
B. 58
C. 68
D. 78

Correct Answer

68

GATE Exam Questions problems

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1. A cantilever beam is shown in the below figure. The moment to be applied at free end for zero vertical deflection at that point is
Options
A. 9 kN.m clock wise
B. 9 kN.m anti-clockwise
C. 12 kN.m clockwise
D. 12 kN.m anti-clockwise

3. The total active thrust on a vertical wall 3m high retaining a horizontal sand backfill (unit weight ?_t = 20 kN/m³, angle of shearing resistance ?' = 30�) when the water table is at the bottom of the wall, will be:
Options
A. 30 kN/m
B. 35 kN/m
C. 4 kN/m
D. 45 kN/m

5. Muskingum method for routing of flood
Options
A. is used for routing floods through reservoirs
B. is a method of routing that uses continuity the momentum equations
C. is a hydrologic method of routing floods through streams
D. is one in which only energy equation is used

6. A vertical rod PQ of length L is fixed at its top end P and has a flange fixed to the bottom end Q. A weight W is dropped vertically from a height h(< L) on to the flange. The axial stress in the rod can be reduced by
Options
A. increasing the length of the rod
B. decreasing the length of the rod
C. decreasing the area of cross-section of the rod
D. increasing the modulus of elasticity of the material

7. Which one of the following conditions, both elastic and plastic methods of analysis of indeterminate structures have to satisfy?
Options
A. yield condition
B. mechanism condition
C. equilibrium
D. compatibility of deformation

8. At highway stretches where the required overtaking sight distance cannot be provided, it is necessary to incorporate in such sections the following :
Options
A. at least twice the stopping sight distance
B. half of the required overtaking sight distance
C. one third of the required overtaking sight distance
D. three times the stopping sight distance.

9. The plastic modulus of a section is 4.8 x 10^-4 m³. The shape factor is 1.2. The plastic moment capacity of the section is 120 kN.m. The yield stress of the material is
Options
A. 100 MPa
B. 240 MPa
C. 250 MPa
D. 300 MPa

10. An isochrone is a line on the basin map
Options
A. Joining raingauge stations having equal rainfall-duration
B. Joining points having equal rainfall depth in a given time interval
C. Joining points having equal time of travel of surface runoff to the catchment outlet
D. Joining points which are at equal distance from the catchment outlet

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