Civil Engineering MCQs

2965 MCQs  (Page 132 of 297)

The settling velocity of a particle in a sedimentation tank increases if_________________?
A. Particle size is decreased
B. The surface area of tank is increased
C. The depth of tank is decreased
D. None of the above
The velocity of flow of water in a sedimentation tank is about__________________?
A. 5 to 10 cm/sec.
B. 15 to 30 cm/sec.
C. 15 to 30 cm/minute
D. 15 to 30 cm/hour
Orthotolidine test is used for determination of________________?
A. Dissolved oxygen
B. Residual chlorine
C. Biochemical oxygen demand
D. Dose of coagulant
Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?
A. Hardness in water
B. Turbidity in water
C. Dissolved oxygen in water
D. Residual chlorine in water
Ground water is usually free from________________?
A. Suspended impurities
B. Dissolved impurities
C. Both suspended and dissolved impuri¬ties
D. None of the above
The maximum discharge of a tube-well is about_________________?
A. 5 litres/sec
B. 50 litres/sec
C. 500 litres/sec
D. 1000 litres/see