WRITTEN EXAM REVIEW PRACTICE
TEST 1 AND 2 WITH CORRECT
QUESTIONS AND ANSWERS.
assuming all other conditions remain constant, a decrease in evaporator load causes - CORRECT
ANSWERS.✔️✔️low suction pressure
in a flooded evaporator using an accumulator and float valve, flash gas - CORRECT
ANSWERS.✔️✔️passes directly into the suction line
the oil trap on a refrigeration system is on the - CORRECT ANSWERS.✔️✔️discharge line, as close to the
compressor as allowed
what controls the operation of a high-side float? - CORRECT ANSWERS.✔️✔️the condenser, and
receiver
when suction pressure decreases,compressor capacity - CORRECT ANSWERS.✔️✔️decreases
cooling-tower water should be maintained at a p h near - CORRECT ANSWERS.✔️✔️7.8
the sub cooling effect of the liquid refrigerant just before the expansion valve causes increased -
CORRECT ANSWERS.✔️✔️refrigeration effect
sub cooling the liquid refrigerant just before the expansion valve, results in an increase in - CORRECT
ANSWERS.✔️✔️refrigeration effect
what percent of oil travels with the refrigerant? - CORRECT ANSWERS.✔️✔️10 percent
any water present in the refrigerant side of a freon refrigeration system causes a - CORRECT
ANSWERS.✔️✔️frozen expansion valve
, when heated, R-12 changes to - CORRECT ANSWERS.✔️✔️phosgene gas
in an absorption system, the medium normally used to vaporize refrigerant and increase its temperature
is - CORRECT ANSWERS.✔️✔️steam
which does not increase the capacity of a water-cooled condenser? - CORRECT
ANSWERS.✔️✔️decreasing the ambient temperature
when energizing a solenoid valve, to close the valve, its position would normally be - CORRECT
ANSWERS.✔️✔️normally open
a valve that does not restrict flow is the - CORRECT ANSWERS.✔️✔️solenoid valve
the oil separator is located on the - CORRECT ANSWERS.✔️✔️discharge line, as far from the compressor
as possible
when we say a refrigerant is anhydrous, we mean - CORRECT ANSWERS.✔️✔️water is absent
the primary purpose of a purger, in a freon system is the removal of - CORRECT
ANSWERS.✔️✔️noncondensables
operating a freon air-conditioning unit with the filters clogged, is likely to result in - CORRECT
ANSWERS.✔️✔️low suction pressure
a refrigerant overcharge would - CORRECT ANSWERS.✔️✔️increase head pressure
on the most common three-phase, four-wire service, the voltage between any phase and neutral should
be - CORRECT ANSWERS.✔️✔️120 volts
the following statement about brine is true - CORRECT ANSWERS.✔️✔️p h should be slightly alkaline at
7.8
TEST 1 AND 2 WITH CORRECT
QUESTIONS AND ANSWERS.
assuming all other conditions remain constant, a decrease in evaporator load causes - CORRECT
ANSWERS.✔️✔️low suction pressure
in a flooded evaporator using an accumulator and float valve, flash gas - CORRECT
ANSWERS.✔️✔️passes directly into the suction line
the oil trap on a refrigeration system is on the - CORRECT ANSWERS.✔️✔️discharge line, as close to the
compressor as allowed
what controls the operation of a high-side float? - CORRECT ANSWERS.✔️✔️the condenser, and
receiver
when suction pressure decreases,compressor capacity - CORRECT ANSWERS.✔️✔️decreases
cooling-tower water should be maintained at a p h near - CORRECT ANSWERS.✔️✔️7.8
the sub cooling effect of the liquid refrigerant just before the expansion valve causes increased -
CORRECT ANSWERS.✔️✔️refrigeration effect
sub cooling the liquid refrigerant just before the expansion valve, results in an increase in - CORRECT
ANSWERS.✔️✔️refrigeration effect
what percent of oil travels with the refrigerant? - CORRECT ANSWERS.✔️✔️10 percent
any water present in the refrigerant side of a freon refrigeration system causes a - CORRECT
ANSWERS.✔️✔️frozen expansion valve
, when heated, R-12 changes to - CORRECT ANSWERS.✔️✔️phosgene gas
in an absorption system, the medium normally used to vaporize refrigerant and increase its temperature
is - CORRECT ANSWERS.✔️✔️steam
which does not increase the capacity of a water-cooled condenser? - CORRECT
ANSWERS.✔️✔️decreasing the ambient temperature
when energizing a solenoid valve, to close the valve, its position would normally be - CORRECT
ANSWERS.✔️✔️normally open
a valve that does not restrict flow is the - CORRECT ANSWERS.✔️✔️solenoid valve
the oil separator is located on the - CORRECT ANSWERS.✔️✔️discharge line, as far from the compressor
as possible
when we say a refrigerant is anhydrous, we mean - CORRECT ANSWERS.✔️✔️water is absent
the primary purpose of a purger, in a freon system is the removal of - CORRECT
ANSWERS.✔️✔️noncondensables
operating a freon air-conditioning unit with the filters clogged, is likely to result in - CORRECT
ANSWERS.✔️✔️low suction pressure
a refrigerant overcharge would - CORRECT ANSWERS.✔️✔️increase head pressure
on the most common three-phase, four-wire service, the voltage between any phase and neutral should
be - CORRECT ANSWERS.✔️✔️120 volts
the following statement about brine is true - CORRECT ANSWERS.✔️✔️p h should be slightly alkaline at
7.8
