NJ Blue Seal Refrigeration Exam Questions and Answers Latest Version Top Rated A+.

NJ Blue Seal Refrigeration Exam Questions and
Answers Latest Version Top Rated A+
Question>> 1

Give the specific heat for water, steam, and ice
Answer>>
water: 1, steam: .5, ice: .5



Question>> 2
What is the definition of compression ratio
Answer>>
Ratio of the absolute discharge pressure to the absolute suction pressure



Question>> 3
The counter-flow principle is an important feature of what type of system?
Answer>>
Double-piped water cooled condenser


Page 1 of 56

,Question>> 4
The absolute Celsius scale is referred to by which temperature scale?
Answer>>
Kelvin



Question>> 5
Refrigerant recyclying is defined as:
Answer>>
Cleaning refrigerant of dirt and contaminants



Question>> 6
Which compressor does not require inlet or discharge valves?
Answer>>
Axial flow



Question>> 7


Page 2 of 56

,600,000 Btu/hr equals how many tons of refrigeration?
Answer>>
600,,000 = 50 tons

Question>> 8
How do the valves on a compressor operate?
Answer>>
By pressure



Question>> 9
What 2 values are needed to calculate the amount of refrigeration required?
Answer>>
The btu's to be removed and the time required to compress the refrigerant



Question>> 10
What is the latent heat of vaporization of water?
Answer>>
970.3 BTU/LB




Page 3 of 56

, Question>> 11
What does the internal overload of a compressor sense?
Answer>>
Excessive amperage in the compressor motor

Question>> 12
When a reciprocating compressor's discharge line is cool, it could indicate:
Answer>>
The evaporator coils have frozen



Question>> 13
As the condensing temperature of a centrifugal system decreases, the power required
by the compessor:
Answer>>
Decreases



Question>> 14
What refrigerant sublimates at 14.7 psia?
Answer>>
Co2


Page 4 of 56