Related Questions

Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
A Hydrocarbons
B Hydrogen flouride
C Hydrogen sulphides
D Nitrogen dioxide
Presence of bacteria in potable (drinking) water causes
A Turbidity
B Disease
C Bad odour
D Bad taste & colour
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
A Sedimentary rocks
B Igneous rocks
C Metamorphic rocks
D None of these
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the
A Pipe length
B Fluid velocity in the pipe
C Time taken to close the valve
D All of the above
A linon was drinking water from a brook. ____ a lamb was also taking water from the downstream of the same brook.
A While
B At the same time
C Hence
D On the contarary
Surface water is a better source of drinking water because it is poor in
A Dust
B Bacteria
C Arsenic
D Algae
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
Due to which of the following reasons excessive bond width in control systems should be avoided ?
A It leads to slow speed of response
B It leads to low relative stability
C Noise is proportional to band width
D None of the above
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called
A Safety valve
B Water level indicator
C Pressure gauge
D Fusible plug

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