Related Questions

Presence of excess flourine in water causes
A Dental cavity
B Tooth decay
C Fluorosis
D Respiratory disease
Presence of bacteria in potable (drinking) water causes
A Turbidity
B Disease
C Bad odour
D Bad taste & colour
Potable water means the water used for
A Fire-fighting
B Cooling
C Drinking
D Evaporation to produce steam
Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has
A High pour point and low smoke point
B Low viscosity index
C High self-ingnition temperature
D All of the above
Drinking (potable) water treatment does not involve
A Coagulation
B Sedimentation
C Softening
D Disinfection
The pH value of potable water should be between
A 1 to 1.5
B 6.5 to 8
C 13 to 14
D 4 to 5
Maximum permissible turbidity in potable water is __________ ppm.
A 1
B 10
C 250
D 1000
TLV of mercury in potable (drinking) water is about __________ ppm.
A 0.001
B 0.1
C 1
D 5
For classification of potable (drinking) water, we use a __________ filter.
A Gravity sand
B Plate and frame
C Vacuum leaf
D Rotary vacuum
5a2-4a-3-3(a2+a+4)=0. What is the sum of the potable value of a?
A 3
B 3.5
C 4
D 4.5

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