NJ BLUE SEAL 2 C REFRIGERATION
ENGINEER EXAM 2026 PRACTICE
QUESTIONS AND CORRECT ANSWERS
THIRD GRADE REFRIGERATION LICENSE
STUDY GUIDE A+ EXAM PREP
When is the best time to purge an ammonia plant? - CORRECT ANSWER-
during operation
How is the static setting of a thermostatic expansion valve rated? -
CORRECT ANSWER-in degrees superheat
An Nh3 compressor suction gauge should be calibrated to read between: -
CORRECT ANSWER-30" vacuum & 300 psig
The counter-flow principle is an important feature of: - CORRECT
ANSWER-double piped water cooled condenser
How often do you inspect your relief valves on an Nh3 system? - CORRECT
ANSWER-every 5 years
How often do you inspect safety valves? - CORRECT ANSWER-every year
, What is the formula to convert Celsius to Fahrenheit? - CORRECT
ANSWER-(C x 1.8) + 32
Name the 4 steps of a mechanical refrigeration system - CORRECT
ANSWER-evaporation, expansion, compression, & condensation
Name the 4 parts of a refrigeration system - CORRECT ANSWER-
compressor, condenser, receiver, & evaporator
Name the 3 methods of heat transfer - CORRECT ANSWER-conduction,
convection, & radiation
What type of heat increases temp, but the state remains the same? -
CORRECT ANSWER-sensible heat
600,000 BTU/HR = ____ tons of refrigeration? - CORRECT ANSWER-
50
How many tons of refrigerant is req'd to prevent 2,000 lbs of ice from
melting in 24 hrs? - CORRECT ANSWER-1 ton
What is the heat of ammonia at 5°F? - CORRECT ANSWER-565 BTUs
What is the pressure of 5°F of ammonia? - CORRECT ANSWER-19.6 psig
ENGINEER EXAM 2026 PRACTICE
QUESTIONS AND CORRECT ANSWERS
THIRD GRADE REFRIGERATION LICENSE
STUDY GUIDE A+ EXAM PREP
When is the best time to purge an ammonia plant? - CORRECT ANSWER-
during operation
How is the static setting of a thermostatic expansion valve rated? -
CORRECT ANSWER-in degrees superheat
An Nh3 compressor suction gauge should be calibrated to read between: -
CORRECT ANSWER-30" vacuum & 300 psig
The counter-flow principle is an important feature of: - CORRECT
ANSWER-double piped water cooled condenser
How often do you inspect your relief valves on an Nh3 system? - CORRECT
ANSWER-every 5 years
How often do you inspect safety valves? - CORRECT ANSWER-every year
, What is the formula to convert Celsius to Fahrenheit? - CORRECT
ANSWER-(C x 1.8) + 32
Name the 4 steps of a mechanical refrigeration system - CORRECT
ANSWER-evaporation, expansion, compression, & condensation
Name the 4 parts of a refrigeration system - CORRECT ANSWER-
compressor, condenser, receiver, & evaporator
Name the 3 methods of heat transfer - CORRECT ANSWER-conduction,
convection, & radiation
What type of heat increases temp, but the state remains the same? -
CORRECT ANSWER-sensible heat
600,000 BTU/HR = ____ tons of refrigeration? - CORRECT ANSWER-
50
How many tons of refrigerant is req'd to prevent 2,000 lbs of ice from
melting in 24 hrs? - CORRECT ANSWER-1 ton
What is the heat of ammonia at 5°F? - CORRECT ANSWER-565 BTUs
What is the pressure of 5°F of ammonia? - CORRECT ANSWER-19.6 psig
