Written Exam Review
Practice test 1 and 2 exam
questions and answers
2025(graded A+)
assuming all other conditions remain constant, a decrease in
evaporator load causes - answer low suction pressure
in a flooded evaporator using an accumulator and float valve, flash
gas - answer passes directly into the suction line
the oil trap on a refrigeration system is on the - answer discharge
line, as close to the compressor as allowed
what controls the operation of a high-side float? - answer the
condenser, and receiver
when suction pressure decreases,compressor capacity - answer
decreases
cooling-tower water should be maintained at a p h near - answer
7.8
the sub cooling effect of the liquid refrigerant just before the
expansion valve causes increased - answer refrigeration effect
sub cooling the liquid refrigerant just before the expansion valve,
results in an increase in - answer refrigeration effect
, what percent of oil travels with the refrigerant? - answer 10
percent
any water present in the refrigerant side of a freon refrigeration
system causes a - answer frozen expansion valve
when heated, R-12 changes to - answer phosgene gas
in an absorption system, the medium normally used to vaporize
refrigerant and increase its temperature is - answer steam
which does not increase the capacity of a water-cooled condenser? -
answer decreasing the ambient temperature
when energizing a solenoid valve, to close the valve, its position
would normally be - answer normally open
a valve that does not restrict flow is the - answer solenoid valve
the oil separator is located on the - answer discharge line, as far
from the compressor as possible
when we say a refrigerant is anhydrous, we mean - answer water is
absent
the primary purpose of a purger, in a freon system is the removal of
- answer noncondensables
operating a freon air-conditioning unit with the filters clogged, is
likely to result in - answer low suction pressure
Practice test 1 and 2 exam
questions and answers
2025(graded A+)
assuming all other conditions remain constant, a decrease in
evaporator load causes - answer low suction pressure
in a flooded evaporator using an accumulator and float valve, flash
gas - answer passes directly into the suction line
the oil trap on a refrigeration system is on the - answer discharge
line, as close to the compressor as allowed
what controls the operation of a high-side float? - answer the
condenser, and receiver
when suction pressure decreases,compressor capacity - answer
decreases
cooling-tower water should be maintained at a p h near - answer
7.8
the sub cooling effect of the liquid refrigerant just before the
expansion valve causes increased - answer refrigeration effect
sub cooling the liquid refrigerant just before the expansion valve,
results in an increase in - answer refrigeration effect
, what percent of oil travels with the refrigerant? - answer 10
percent
any water present in the refrigerant side of a freon refrigeration
system causes a - answer frozen expansion valve
when heated, R-12 changes to - answer phosgene gas
in an absorption system, the medium normally used to vaporize
refrigerant and increase its temperature is - answer steam
which does not increase the capacity of a water-cooled condenser? -
answer decreasing the ambient temperature
when energizing a solenoid valve, to close the valve, its position
would normally be - answer normally open
a valve that does not restrict flow is the - answer solenoid valve
the oil separator is located on the - answer discharge line, as far
from the compressor as possible
when we say a refrigerant is anhydrous, we mean - answer water is
absent
the primary purpose of a purger, in a freon system is the removal of
- answer noncondensables
operating a freon air-conditioning unit with the filters clogged, is
likely to result in - answer low suction pressure
