Foodstuffs
Woolen clothes
Metallic powder
None of these
✅ The correct answer is option A.
Enviornmental Engineering MCQs
In large thermal power stations very fine particulates present in flue gas are removed by
Wet scrubber
Bag filter
Electrostatic precipitators
Dust catcher
✅ The correct answer is option C.
Operating principle of cyclone separator is based on the action of __________ dust particles.
Diffusion of
Centrifugal force on
Gravitational force on
Electrostatic force on
✅ The correct answer is option B.
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
Decreases
Increases
Remains constant
May increase or decrease ; depends on the chemical characteristics of polluted water
✅ The correct answer is option A.
Which of the following is not a practical method of low level radioactive waste disposal?
Dilution with inert material
Discharging to atmosphere through tall stacks after dilution
Disposing off in rivers & oceans
Filling in steel crates and shooting it off out of earth
✅ The correct answer is option D.
The widest explosive limit is of __________ , thereby making it the most explosive gas.
Acetylene
Petrol vapor
Hydrogen
Carbon monoxide
✅ The correct answer is option A.
The pH value of potable water should be between
1 to 1.5
6.5 to 8
13 to 14
4 to 5
✅ The correct answer is option B.
Presence of __________ in water stream are deleterious to aquatic life.
Soluble and toxic organics
Suspended solids
Heavy metals and cynides
All of the above
✅ The correct answer is option D.
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
Pipe vibrations
Cavitation
Boundary layer separation
Fluctuation in liquid flow
✅ The correct answer is option B.
Presence of iron and manganese in water causes
Reduction in its dissolved oxygen content
Discoloration of bathroom fixtures
Temporary hardness
None of these
✅ The correct answer is option B.