Indian standard specifies ______ as the specific temperature for reporting the specific gravity

Question

Question

This question was previously asked in

JKSSB JE Civil Jal Shakti 6 Dec 2022 Official Paper (Shift 2)

Answer 1

Explanation:

Specific Gravity:

Specific Gravity is a dimensionless quantity that is defined as the ratio of the density of a substance to the density of the water at a temperature of 27°C.
It is common to use the density of water at 4°C as a reference point as water at this point has the highest density of 1000 kg/m3.
The specific gravity shall be calculated at 27°C.

If the room temperature is different than 27°C, the following corrections shall be done:

G’ = KG

Where G’ = corrected specific gravity at 27°C, and

\(K = \frac{{{\rm{Relative\;density\;of\;water\;at\;room\;temperature}}}}{{{\rm{Relative\;density\;of\;water\;at\;}}27^\circ {\rm{\;C}}}}\)