Protection from radiations is possible through
A.shielding of source of radiation
B.increased distance from the source of radiation
C.limitation on time of exposure
D.All of the above
Category: Environmental Engineering Mcqs
The speed of sound will be maximum through
A.Water
B.Alcohol
C.Concrete
D.Aluminium
The colour of water is measured
A.In ferms of pH value
B.In terms of degree of hardness
C.In terms of platinum cobalt scale
D.ppm of dissolved solids
E.None of the above
Suspended liquid droplets generated by condensation from the gaseous to the liquid state or by breaking up a liquid into a dispersed state is known as
A.Dust
B.Fume
C.Mist
D.Vapours
E.None of the above
Which of the following has least wave-length?
A.Cosmic rays
B.Ultraviolet rays
C.X-rays
D.Gamma rays
Short circuit means:
A.Direct flow of current between two points of different potential
B.Indirect flow of current between two points
C.Direct flow of current between points of the same potential
D.none of the above
Car speed of a lift is usually
A.0.1 to 0.3 m/s
B.0.5 to 1 m/s
C.2 to 5 m/s
D.7 to 10 m/s
Turbidity in water may be removed by
A.Sedimentation
B.Filtration
C.Agitation
D.Aeration
E.Oxidation
Which of the following particles will be smallest in size?
A.Smog
B.Rain
C.Drizzle
D.Mist
E.Fog
Which of the following area of work needs lowest noise level?
A.Gymnasiums
B.Lecture halls
C.Library
D.Kitchens
