HVAC EPA EXAM – CORE QUESTIONS & ANSWERS
An ozone molecule consists of - Answer -3 oxygen atoms
Depletion of Ozone in the stratosphere causes: - Answer -1. Crop loss
2. Increase in eye disease
3. Skin cancer
4. Reduced marine life
5. Deforestation
6. Increased ground level ozone
When released into the atmosphere deplete the Ozone layer - Answer -CFC and HFC
What happens when a chlorine atom meets with an Ozone molecule? - Answer -it
takes 1 oxygen atom away from the Ozone, forming Chlorine Monoxide
___ chlorine atom can destroy ________ ozone molecules - Answer -one chlorine;
100,000 Ozone molecules
The chlorine in CFC's will neither dissolve in water nor - Answer -break down into
compounds that dissolve in water
Measurement of CFC's and HCFC's ability to destroy ozone is - Answer -Ozone
Depletion Potential
The compound gauge (blue) and the high pressure gauge (red) are connected to the
manifold - Answer -the manifold is connected by hoses to access ports to measure
system pressures
EPA regulations require that hoses be equipped with - Answer -low loss fittings that will
minimize refrigerant loss when hoses are disconnected
(1) the metering device causes a reduction in pressure, and therefore.. - Answer -a
reduction in saturation temperature
(2) Heat is absorbed in the evaporator and causes the refrigerator to - Answer -boil
from liquid to vapor
(3)at the outlet of the evaporator, the refrigerant is now a - Answer -low temperature,
low pressure vapor
(4) refrigerant vapor travels to the inlet of the compressor, the refrigerant vapor is then -
Answer -compressed and moves the condenser
(5) as the refrigerant expels heat, - Answer -the refrigerant condenses to a liquid
An ozone molecule consists of - Answer -3 oxygen atoms
Depletion of Ozone in the stratosphere causes: - Answer -1. Crop loss
2. Increase in eye disease
3. Skin cancer
4. Reduced marine life
5. Deforestation
6. Increased ground level ozone
When released into the atmosphere deplete the Ozone layer - Answer -CFC and HFC
What happens when a chlorine atom meets with an Ozone molecule? - Answer -it
takes 1 oxygen atom away from the Ozone, forming Chlorine Monoxide
___ chlorine atom can destroy ________ ozone molecules - Answer -one chlorine;
100,000 Ozone molecules
The chlorine in CFC's will neither dissolve in water nor - Answer -break down into
compounds that dissolve in water
Measurement of CFC's and HCFC's ability to destroy ozone is - Answer -Ozone
Depletion Potential
The compound gauge (blue) and the high pressure gauge (red) are connected to the
manifold - Answer -the manifold is connected by hoses to access ports to measure
system pressures
EPA regulations require that hoses be equipped with - Answer -low loss fittings that will
minimize refrigerant loss when hoses are disconnected
(1) the metering device causes a reduction in pressure, and therefore.. - Answer -a
reduction in saturation temperature
(2) Heat is absorbed in the evaporator and causes the refrigerator to - Answer -boil
from liquid to vapor
(3)at the outlet of the evaporator, the refrigerant is now a - Answer -low temperature,
low pressure vapor
(4) refrigerant vapor travels to the inlet of the compressor, the refrigerant vapor is then -
Answer -compressed and moves the condenser
(5) as the refrigerant expels heat, - Answer -the refrigerant condenses to a liquid
