831. All are classified under direct labor expenses EXCEPT one. Which one ?
A. Inspection cost
B. Testing cost
C. Assembly cost
D. Supervision cost
✅ The correct answer is option D.
Civil Engineering
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832. If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is___________________?
A. 2 hours
B. 4 hours
C. 6 hours
D. 8 hours
✅ The correct answer is option D.
833. In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is____________________?
A. Q/(B × D)
B. Q/(L × D)
C. Q/L
D. Q/(B × L)
✅ The correct answer is option D.
834. The porosity of sediments in sewer pipes, is usually taken as___________________?
A. 0.010
B. 0.011
C. 0.012
D. 0.013
✅ The correct answer is option D.
835. Sewer ventilating columns are generally placed at_______________?
A. Distances 150 m to 300 m
B. Upper ends of branch sewers
C. Every change in the size of sewers
D. All the above
✅ The correct answer is option D.
836. A metal with specific gravity of o floating in a fluid of same specific gravity a will___________________?
A. sink to bottom
B. float over fluid
C. partly immersed
D. be fully immersed with top surface at fluid surface
✅ The correct answer is option D.
837. When the flow parameters at any given instant remain same at every point, then flow is said to be____________________?
A. quasi static
B. steady state
C. laminar
D. uniform
✅ The correct answer is option D.
838. Aerobic bacterias___________________?
A. Flourish in the presence of free oxygen
B. Consume organic matter as their food
C. Oxidise organic matter in sewage
D. All the above
✅ The correct answer is option D.
839. Which one of the following resists hydrogen sulphide corrosion ?
A. R.C.C.
B. Glazed stone wares
C. Asbestos cement
D. Glazed ware
✅ The correct answer is option D.
840. Before discharging the foul sewage into rivers, it is generally treated by_____________________?
A. Screening
B. Sedimentation
C. Oxidation
D. All the above
✅ The correct answer is option D.