Statement (I): Effective temperature is an index which correlates the combined effect of air temperature, air humidity and air movement upon human thermal comfort. Statement (II): Thermal comfort is not affected by mean radiant temperature. ?

Question

Statement (I): Effective temperature is an index which correlates the combined effect of air temperature, air humidity and air movement upon human thermal comfort. Statement (II): Thermal comfort is not affected by mean radiant temperature. ?

Both Statement I) and Statement II) are individually true and Statement II) is the correct explanation of Statement I)
Both Statement I) and Statement II) are individually true but Statement II) is not the correct
Statement I) is true but Statement II) is false
Statement I) is false but Statement II) is true

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

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AhmedNazir · Accepted Answer · 2022-09-04T04:29:57+06:00

Option 3 : Statement I) is true but Statement II) is false

Human Comfort and Effective temperature: Human comfort in the air conditioning can be defined as comfort which is experienced by a person through adjustment of dry bulb temperature, relative humidity and air velocity.

The effective temperature is the temperature of the saturated environment at which motionless saturated air would induce same level of comfort as experienced in a normal environment in a sedentary worker wearing ordinary indoor clothing.

From the above definition we can say that Statement I) is correct.

Mean radiant temperature (MRT) is also a parameter that defines thermal comfort index. MRT depends upon ceiling and floor temperature, sunlight through windows. So, it is an important parameter in thermal comfort. Thus, Statement II) is false.