CORE
PRACTICE TEST 1
ARE YOU READY?
LET’S PRACTICE!
Which of the following refrigerants is an HCFC?
Deselect Answer
R-410a
R-134a
R-123
R-12
None
Research and data show that chlorine in the stratosphere mainly comes from man-made CFC’s rather than natural sources such as volcanoes because
Deselect Answer
All the above
the rise in the amount of chlorine in the stratosphere matches the rise in the amount of fluorine, which has different natural sources than chlorine.
air samples taken from the stratosphere over erupting volcanoes show that volcanoes contribute a small quantity of chlorine to the stratosphere when compared to CFCs.
the rise in the amount of chlorine in the stratosphere matches the rise in CFC emissions.
None
The Montreal Protocol is
Deselect Answer
a testing procedure for measuring the amount of chlorine in the stratosphere.
a multi-national treaty that controls the production of CFC and HCFC refrigerants.
a procedure or protocol to test for ozone concentration in the atmosphere.
an energy efficiency test developed by the Canadian government.
None
In a refrigeration system, the component that changes low-pressure vapor to high-pressure vapor is the
Deselect Answer
compressor.
TXV.
evaporator.
condenser.
None
Chlorofluorocarbon (CFC) and hydrofluorocarbon (HCFC) refrigerants have which of the following in common?
Deselect Answer
They have identical ODP.
They both must be recovered before opening appliances for servicing or disposing of them.
They both contain hydrogen.
They have the same normal boiling points.
None
Time’s up
BACK TO ALL TEST SIMULATIONS
