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Question:

EPA has divided refrigerated appliances into _____ types.

A Three
explanation

Type I: Small appliances
Type II: Medium Pressure appliances, High pressure appliances, Very high pressure appliances
Type III: Low pressure appliances

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Related Questions

As the pressure on the refrigeration liquid increases, the boiling point of the refrigeration liquid _____.

Increases

The boiling point of the refrigeration liquid depends on the surrounding pressure. Liquids vaporize when the molecules are apart and faster. As pressure increases, an external force is applied on the refrigerant molecules so that they are close to each other. Therefore, boiling point of the liquid increase with the increase in pressure.

What do disposable cylinders consist of?

One-way valve

All disposable cylinders will have one way check valve which allows the refrigerant to leave the cylinder but not to refill it.

Reclaimed refrigerant must meet the standard set forth in _______ before it can be resold.

ARI 700

Recovered refrigerant shall not be sold without Reclaimed. Reclaimed refrigerant shall meet ARI 700 purity standard.

Which the of the following refrigerants contributes to global warming?

All the mentioned refrigerants contributes

All of the mentioned refrigerants contribute to Global Warming. Global Warming Potential (GWP) is taken with reference as CO2 (as 1). All HFCs, HCFCs & CFCs contribute to global warming and have several times higher than CO2.

The temperature at which the refrigerant starts to evaporate is ______.

Bubble point

At bubble point temperature, the refrigerant starts to evaporate. At Dew point, the last refrigerant evaporates.

Refrigerants will be of high pressure hot vapor phase in which of the following lines?

Discharge line

As the refrigerant is compressed, hot vapor leaves the compressor to condenser for expansion. This is discharge line in refrigeration system.

When checking for leaks in a system, which of the following gas is used?

Nitrogen

Nitrogen gas is used for checking leaks in the system as its temperature variation under pressurization is low. It is also considered because of its relative inert and inexplosive nature.

Refillable cylinders at high pressure under ambient temperature must be hydrostatically tested and date stamped every ______ years.

5

Reusable cylinders must have Department of Transportation (DOT) stamp of approval.

Nitrogen constitutes ______ of the earth’s atmosphere.

78%

Nitrogen constitutes about 78% of the air we breathe. It is a colorless, odorless, non-flammable, stable, and non-inert gas. Dry Nitrogen is used as leak detection gas and purging gas in the HVAC system.

What has very low molecular weight?

Helium

Helium has the molecular weight of 4. That's why the helium molecule is smaller than Hydrogen. Because of the smaller molecular weight, it can be able to escape from small leaks more easily than refrigerant. Therefore, Helium is used in leak detection. Helium has another advantage of inertness.

Only _____ refrigerant can be transferred or sold to another individual.

Reclaimed

Reclaimed refrigerant shall meet ARI 700 purity standard.

Ban on the production or import of any HCFC refrigerant will take effect from _____.

2020

On or after 1st Jan 2020, production or import of HCFC refrigerant will be banned. Only reclaimed or recovered HCFC shall be used for existing equipment.

Pressure Relief valves must be installed in which of the following arrangements?

Parallel

Pressure Relief Valves are installed in parallel so that failure of one valve will not compromise the safety of the cylinder.

______ formed at the stratosphere is unstable and strips a free oxygen atom and then releases the chlorine ion which continues the chain reaction of destroying ozone molecules.

Chlorine monoxide

Sun’s UV radiation breaks Chlorine in CFCs or HCFCs to form Chlorine atom. This Chlorine atom reacts with ozone molecule to form chlorine monoxide radical and oxygen.