If the energy radiated per second per sq. cm. of the surface for wave lengths lying between ?, and ? + d? is represented by (e?.d?), then e? is called

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189) If the energy radiated per second per sq. cm. of the surface for wave lengths lying between ?, and ? + d? is represented by (e?.d?), then e? is called

absorptive power

emissive power

emissivity

none of these

Answer is:

it is not affected by the moisture present in the air

its bulb is surrounded by a wet cloth exposed to the air

the moisture present in it begins to condense

none of the above

Answer is:

heated and dehumidified

heated and humidified

cooled and humidified

cooled and dehumidified

Answer is:

automatic expansion valve

high side float valve

thermostatic expansion valve

low side float valve

Answer is:

0.376

0.4

0.6

0.67

Answer is: