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Question:

Stratosphere layer consists of ____ of the available Ozone on the earth’s atmosphere.

A 90%
explanation

Stratosphere layer consists of about 90% of ozone, which protects earth from the sun’s harmful UV radiation.

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Related Questions

Disposable cylinders are used only for which of the following refrigerants?

Virgin refrigerant

Disposable cylinders are used for virgin refrigerants & reclaimed refrigerants only.

Class II refrigerants have ozone depletion potential (ODP) of less than _____.

0.2

HCFCs comes under Class II Refrigerants with ODP of less than 0.2.

Refrigerant in Discharge Line will be in which of the following phases?

Hot vapor

Discharge line connects the compressor to the inlet of condenser. As compressor compresses the refrigerant, it will be in hot high pressure vapor phase.

Under the EPA’s “safe disposal requirement”, who is responsible for making sure that the refrigerant has been removed from household refrigerators before they are disposed of?

the final person in the disposal chain.

Under the EPA’s “safe disposal requirement”, the final person in the disposal chain is responsible for making sure that the refrigerant has been removed from household refrigerators before they are disposed of.

The warmer the temperature of the refrigeration system, the slower it will evacuate.

False

The warmer the refrigeration system, the warmer and denser the refrigeration vapor will be. Therefore, the compressor in the recovery system transfers more refrigerant per minute.

Only CFCs and HCFCs refrigerants are to be mandatorily recovered.

False

All refrigerants must be recovered not only CFCs and HCFCs

Never use oxygen or compressed air to pressurize a system because _____.

when mixed with compressor oil or some refrigerants, it could explode.

Never use oxygen or compressed air to pressurize a system because when mixed with compressor oil or some refrigerants, it could explode.

After 1995, supplies of CFC refrigerants used to service existing refrigeration appliances in the United States can only come from _______.

recovery and recycling.

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The type of oil that is most commonly used in stationary refrigeration applications with HFC-134a refrigerant is ______.

ester oil.

The type of oil that is most commonly used in stationary refrigeration applications with HFC-134a refrigerant is ester oil.

Refrigerant vapors or mist should not be inhaled because _____.

they may cause heart irregularities and/or unconsciousness.

Refrigerant vapors or mist should not be inhaled because they may cause heart irregularities and/or unconsciousness.

It is illegal to _____.

knowingly release any refrigerant during the service maintenance, repair or disposal of appliances with the exception of de minimis releases.

It is illegal to knowingly release any refrigerant during the service maintenance, repair or disposal of appliances with the exception of de minimis releases.