GCAP Operator 2 exam
questions and answers
2025(graded A+)
What is NOT Mechanical Integrity?
A) Housekeeping
B) Inspections/Tests
C) Permit Process
D) Preventive and Predictive Maintenance - answer C) Permit
Process
What is the common acronym for best practices?
A) IIAR
B) RAGAGEP
C) ASHRAE
D) ASME - answer B) RAGAGEP
(Recognized and Generally Accepted Good Engineering Practices)
What is CUI?
A) Corrosion Under Insulation
B) Compressor Under Isolation
C) Condenser Under Isolation
D) None of the above - answer A) Corrosion Under Insulation
What is CUPL?
A) Corrosion Under Pipe Label
,B) Compressor Under Isolation and Locked
C) Condenser Under Isolation and Locked
D) None of the above - answer A) Corrosion Under Pipe Label
How much pipe loss is allowed by IIAR before they recommend
subjective analysis?
A) 5%
B) 10%
C) 15%
D) 20% - answer B) 10%
When taking an upcharge of Ammonia, what is the most water
concentration that should be in the Ammonia to be called anhydrous
or refrigeration grade?
A) 100 PPM
B) 500 PPM
C) 1,000 PPM
D) 5,000 PPM - answer B) 500 PPM
When water increases in concentration in the Ammonia it will cause
many undesirable conditions. What will happen to the SAT
temperature?
A) Rise compared to SAT charts
B) Lower compared to SAT charts
C) Stay the same
D) Depends on the pressure, sometime rises and sometime lowers -
answer A) Rise compared to SAT charts
What are the three Non-Destructive Techniques used in Mechanical
Integrity Inspections? - answer Radiographic
,Ultrasonic
Infrared
Which of these is NOT a factor of heat transfer?
A) Temperature Difference
B) Density of Material
C) Thermal Conductivity
D) Surface Area - answer B) Density of Material
Thermal Conductivity, also known as "K" value, is what?
A) A scientific measurement to the number of BTU's that will pass in
one hours, through a material 1" thick, with an area of 1ft2, if the
temperature difference from one side to the other is 1°F
B) Exactly the same results for all materials
C) A measure of total energy
D) Theoretical measurement used to calculate discharge
temperatures - answer A) A scientific measurement to the number
of BTU's that will pass in one hours, through a material 1" thick,
with an area of 1ft2, if the temperature difference from one side to
the other is 1°F
Which of these would be a better resistor to heat transfer?
A) Steel
B) Aluminum
C) Stainless Steel
D) Saw Dust - answer D) Saw Dust
What is true about "K" value and "R" value? (What's the difference?)
- answer "K" value is a materials ability to transfer heat
(conductor)
"R" value is a materials ability to NOT transfer heat (insulator)
, Understanding the "U" Factor means that a good operator will do
what?
A) Only consider if the system is maintaining temperature
B) Make sure there is no impeding substance such as ice, dirt, oil on
the surfaces of heat exchangers daily
C) Make sure the compressors are not at maximum compression
ratio
D) Use maximum airflow across the coil - answer B) Make sure
there is no impeding substance such as ice, dirt, oil on the surfaces
of heat exchangers daily
How many BTU's will be required to be removed from the carrot to
drop to the following desired temperature?
7,000 lbs. of carrots are 95°F and need to be cooled to 36°F
The specific heat of a carrot above freezing is 0.94 BTU/lb. and
below freezing is 0.48 BTU/lb.
A) 198,249 BTU's
B) 240,189 BTU's
C) 220,833 BTU's
D) 388,220 BTU's - answer Sensible Heat = Mass x Specific Heat x
(T1 - T2)
7,000 x 0.94 x (95 - 36)
7,000 x 0.94 x 59 = 388,220 BTU's
Ammonia is at the following conditions, 85°F and 140 PSIG. What is
the condition of the refrigerant?
A) SAT
B) Superheated
C) Sub-cooled
D) Trans-critical - answer B) Superheated
questions and answers
2025(graded A+)
What is NOT Mechanical Integrity?
A) Housekeeping
B) Inspections/Tests
C) Permit Process
D) Preventive and Predictive Maintenance - answer C) Permit
Process
What is the common acronym for best practices?
A) IIAR
B) RAGAGEP
C) ASHRAE
D) ASME - answer B) RAGAGEP
(Recognized and Generally Accepted Good Engineering Practices)
What is CUI?
A) Corrosion Under Insulation
B) Compressor Under Isolation
C) Condenser Under Isolation
D) None of the above - answer A) Corrosion Under Insulation
What is CUPL?
A) Corrosion Under Pipe Label
,B) Compressor Under Isolation and Locked
C) Condenser Under Isolation and Locked
D) None of the above - answer A) Corrosion Under Pipe Label
How much pipe loss is allowed by IIAR before they recommend
subjective analysis?
A) 5%
B) 10%
C) 15%
D) 20% - answer B) 10%
When taking an upcharge of Ammonia, what is the most water
concentration that should be in the Ammonia to be called anhydrous
or refrigeration grade?
A) 100 PPM
B) 500 PPM
C) 1,000 PPM
D) 5,000 PPM - answer B) 500 PPM
When water increases in concentration in the Ammonia it will cause
many undesirable conditions. What will happen to the SAT
temperature?
A) Rise compared to SAT charts
B) Lower compared to SAT charts
C) Stay the same
D) Depends on the pressure, sometime rises and sometime lowers -
answer A) Rise compared to SAT charts
What are the three Non-Destructive Techniques used in Mechanical
Integrity Inspections? - answer Radiographic
,Ultrasonic
Infrared
Which of these is NOT a factor of heat transfer?
A) Temperature Difference
B) Density of Material
C) Thermal Conductivity
D) Surface Area - answer B) Density of Material
Thermal Conductivity, also known as "K" value, is what?
A) A scientific measurement to the number of BTU's that will pass in
one hours, through a material 1" thick, with an area of 1ft2, if the
temperature difference from one side to the other is 1°F
B) Exactly the same results for all materials
C) A measure of total energy
D) Theoretical measurement used to calculate discharge
temperatures - answer A) A scientific measurement to the number
of BTU's that will pass in one hours, through a material 1" thick,
with an area of 1ft2, if the temperature difference from one side to
the other is 1°F
Which of these would be a better resistor to heat transfer?
A) Steel
B) Aluminum
C) Stainless Steel
D) Saw Dust - answer D) Saw Dust
What is true about "K" value and "R" value? (What's the difference?)
- answer "K" value is a materials ability to transfer heat
(conductor)
"R" value is a materials ability to NOT transfer heat (insulator)
, Understanding the "U" Factor means that a good operator will do
what?
A) Only consider if the system is maintaining temperature
B) Make sure there is no impeding substance such as ice, dirt, oil on
the surfaces of heat exchangers daily
C) Make sure the compressors are not at maximum compression
ratio
D) Use maximum airflow across the coil - answer B) Make sure
there is no impeding substance such as ice, dirt, oil on the surfaces
of heat exchangers daily
How many BTU's will be required to be removed from the carrot to
drop to the following desired temperature?
7,000 lbs. of carrots are 95°F and need to be cooled to 36°F
The specific heat of a carrot above freezing is 0.94 BTU/lb. and
below freezing is 0.48 BTU/lb.
A) 198,249 BTU's
B) 240,189 BTU's
C) 220,833 BTU's
D) 388,220 BTU's - answer Sensible Heat = Mass x Specific Heat x
(T1 - T2)
7,000 x 0.94 x (95 - 36)
7,000 x 0.94 x 59 = 388,220 BTU's
Ammonia is at the following conditions, 85°F and 140 PSIG. What is
the condition of the refrigerant?
A) SAT
B) Superheated
C) Sub-cooled
D) Trans-critical - answer B) Superheated
