REFRIGERATION EXCELLENCE QUESTIONS WITH PASSED GRADES!!
When was MDFR organized as the "Fire Patrol" - (answer)1935
How many employees and trucks did the original fire patrol have? - (answer)1 employee and 1 truck
Whos direction was the original fire patrol under? - (answer)The Agriculture Department
When did the patrol expand? - (answer)1957
How many employees did the patrol have in 1957 - (answer)51 employees
How many stations did the patrol have in 1957 - (answer)10 stations
How many apparatus did the patrol have in 1957? - (answer)12 pieces
When did the patrol become a division of Dade County Public Safety? - (answer)1958
When did the inaugural class graduate and how many firefighters? - (answer)1960 with 15 firefighters
When was Metropolitan of Dade County Fire Department (MDFD) created? - (answer)1965
1. In a dry type (direct expansion)
evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to:
A. Operate at high-efficiency
B. Ensure that Frost is not accumulate
C. Subcool the compressor
D. Ensure proper oil return - (answer)A. Operate at high-efficiency
2. The difference between the temperature of the refrigerant boiling in the evaporator and the
temperature at the evaporator outlet is known as
,REFRIGERATION EXCELLENCE QUESTIONS WITH PASSED GRADES!!
A. Evaporator superheat
B. Latent heat
C. Evaporator sub-cooling
D. Sublimation - (answer)A. Evaporator superheat
3. An expansion device that is stuck open will cause
A. Low suction pressure
B. A starved evaporator
C. Excessive superheat
D. A flooded evaporator - (answer)D. A flooded evaporator
4. When measuring evaporator superheat on a commercial system that has a long suction line, the
pressure reading should be taken at the
A. Compressor inlet
B. Evaporator outlet
C. Condenser outlet
D. Receiver Inlet - (answer)A. Compressor inlet
5. Superheat measurements are best taken
A. During a hot pulldown
B. At 8°F two 12°F
C. During defrost
D. With the system operating at design conditions - (answer)D. With the system operating at design
conditions
6. A technician is checking the superheat on a multi circuit evaporator and finds one of the circuits has a
superheat that is higher than the others. This could be caused by
A. A dirty coil
, REFRIGERATION EXCELLENCE QUESTIONS WITH PASSED GRADES!!
B. A refrigerant overcharge
C. Uneven air distribution
D. A blocked distributor - (answer)D. A blocked distributor
7. A TXV with an external equalizer is used on
A. Evaporators with a high pressure drop
B. Evaporators with a low pressure drop
C. High temperature application is only
D. All evaporators - (answer)A. Evaporators with a high pressure drop
8. Dry type evaporators operate most efficiently with the superheat setting of approximately
A. 8°F to 12°F
B. 13°F to 19°F
C. 20°F to 30°F
D. 31°F to 40°F - (answer)A. 8°F to 12°F
9. An evaporator used to chill liquids is operating within normal superheat setting. But the system is not
cooling the product properly. Which of the following is most likely the cause?
A. Overcharge of refrigerant
B. Undercharge of refrigerant
C. The circulator
D. The TXV - (answer)A. Overcharge of refrigerant
10. What time interval is required between each superheat adjustment?
A. Not less than one hour
B. About 10 to 15 minutes
C. At least a half hour
D. No time delay - (answer)B. About 10 to 15 minutes
When was MDFR organized as the "Fire Patrol" - (answer)1935
How many employees and trucks did the original fire patrol have? - (answer)1 employee and 1 truck
Whos direction was the original fire patrol under? - (answer)The Agriculture Department
When did the patrol expand? - (answer)1957
How many employees did the patrol have in 1957 - (answer)51 employees
How many stations did the patrol have in 1957 - (answer)10 stations
How many apparatus did the patrol have in 1957? - (answer)12 pieces
When did the patrol become a division of Dade County Public Safety? - (answer)1958
When did the inaugural class graduate and how many firefighters? - (answer)1960 with 15 firefighters
When was Metropolitan of Dade County Fire Department (MDFD) created? - (answer)1965
1. In a dry type (direct expansion)
evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to:
A. Operate at high-efficiency
B. Ensure that Frost is not accumulate
C. Subcool the compressor
D. Ensure proper oil return - (answer)A. Operate at high-efficiency
2. The difference between the temperature of the refrigerant boiling in the evaporator and the
temperature at the evaporator outlet is known as
,REFRIGERATION EXCELLENCE QUESTIONS WITH PASSED GRADES!!
A. Evaporator superheat
B. Latent heat
C. Evaporator sub-cooling
D. Sublimation - (answer)A. Evaporator superheat
3. An expansion device that is stuck open will cause
A. Low suction pressure
B. A starved evaporator
C. Excessive superheat
D. A flooded evaporator - (answer)D. A flooded evaporator
4. When measuring evaporator superheat on a commercial system that has a long suction line, the
pressure reading should be taken at the
A. Compressor inlet
B. Evaporator outlet
C. Condenser outlet
D. Receiver Inlet - (answer)A. Compressor inlet
5. Superheat measurements are best taken
A. During a hot pulldown
B. At 8°F two 12°F
C. During defrost
D. With the system operating at design conditions - (answer)D. With the system operating at design
conditions
6. A technician is checking the superheat on a multi circuit evaporator and finds one of the circuits has a
superheat that is higher than the others. This could be caused by
A. A dirty coil
, REFRIGERATION EXCELLENCE QUESTIONS WITH PASSED GRADES!!
B. A refrigerant overcharge
C. Uneven air distribution
D. A blocked distributor - (answer)D. A blocked distributor
7. A TXV with an external equalizer is used on
A. Evaporators with a high pressure drop
B. Evaporators with a low pressure drop
C. High temperature application is only
D. All evaporators - (answer)A. Evaporators with a high pressure drop
8. Dry type evaporators operate most efficiently with the superheat setting of approximately
A. 8°F to 12°F
B. 13°F to 19°F
C. 20°F to 30°F
D. 31°F to 40°F - (answer)A. 8°F to 12°F
9. An evaporator used to chill liquids is operating within normal superheat setting. But the system is not
cooling the product properly. Which of the following is most likely the cause?
A. Overcharge of refrigerant
B. Undercharge of refrigerant
C. The circulator
D. The TXV - (answer)A. Overcharge of refrigerant
10. What time interval is required between each superheat adjustment?
A. Not less than one hour
B. About 10 to 15 minutes
C. At least a half hour
D. No time delay - (answer)B. About 10 to 15 minutes
