CIRO: Written Exam Review Practice
test 1 and 2 Questions and Answers.
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
a refrigerant overcharge would - Answer increase head pressure
on the most common three-phase, four-wire service, the voltage between any phase and
neutral should be - Answer 120 volts
the following statement about brine is true - Answer p h should be slightly alkaline at 7.8
which desiccant is not used in refrigeration? - Answer soda lime
in an efficiently operating induced-draft cooling tower, the leaving water temperature is -
Answer between dry-bulb, and wet-bulb temperature
which does not remove acid from refrigerant - Answer calcium chloride
which desiccant cannot be used with an R-40 system - Answer calcium chloride
calcium chloride cannot be used with an R-40 system, and will not remove acid from refrigerant
- Answer
the substance commonly used to dry methyl chloride refrigerant is - Answer activated
alumina
test 1 and 2 Questions and Answers.
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
a refrigerant overcharge would - Answer increase head pressure
on the most common three-phase, four-wire service, the voltage between any phase and
neutral should be - Answer 120 volts
the following statement about brine is true - Answer p h should be slightly alkaline at 7.8
which desiccant is not used in refrigeration? - Answer soda lime
in an efficiently operating induced-draft cooling tower, the leaving water temperature is -
Answer between dry-bulb, and wet-bulb temperature
which does not remove acid from refrigerant - Answer calcium chloride
which desiccant cannot be used with an R-40 system - Answer calcium chloride
calcium chloride cannot be used with an R-40 system, and will not remove acid from refrigerant
- Answer
the substance commonly used to dry methyl chloride refrigerant is - Answer activated
alumina
