Top 350+ Solved Environmental Engineering MCQ Questions Answer
Q. Screens are inclined to the direction offlow to
a. increase the flowvelocity
b. increase theopening area
c. decrease theflow velocity
d. increase the headloss
Q. Which of the following device is used for the removal of oil and grease?
a. skimming tank
b. grit chambers
c. tube settlers
d. flocculator
Q. In which type of settling, sedimentation of discrete particlestakes place?
a. zone settling
b. compression settling
c. hindered settling
d. discrete settling
Q. The settling velocity of sphericalparticle is given by
a. darcy weisbachequation
b. hazen andwilliam equation
c. stokesequation
d. bernoulli’sequation
Q. In which type of settling, settling of particles takes place by the contact of impurities with each other present inwastewater?
a. flocculent settling
b. hindered settling
c. compression settling
d. discrete settling
Q. In which settling type, dilutesuspension of particles takes place?
a. zone settling
b. compressionsettling
c. hinderedsettling
d. discrete settling
Q. What is the settling velocity of the particle in the wastewater if its diameter is 2 * 10-3cm. Given G=2.65, viscosity v=8 * 10-3cm2/Sec?
a. 0.01cm/sec
b. 0.13cm/sec
c. 0.24cm/sec
d. 0.36cm/sec
Q. The average time required by water to pass through the settling tank is called
a. detention time
b. flow through period
c. time of flow
d. mean time
Q. In preliminary treatment of sewage, the operation which takes place, is
a. removal of fine suspended particles
b. removal of fine dissolved organic material
c. removal of lighter floating material
d. removal of harmful bacterias and otherorganisms