NJ Blue Seal 2026- EXAM QUESTIONS AND
VERIFIED ANSWERS 2026(GRADED A+)
DETAILED ANSWERS!!
sensible heat
What is the term for heat that increases the temp of refrigerant without causing a change of
state
The removal of 200 btus per minute
One ton of refrigeration is qual to:
dynamic head
What is the term used to describe the sum of the friction head, the velocity head, and the
pressure head?
The running windings
What Circuit(s) is (are)energized after the compressor motor reaches operating speed?
oil in the evaporator
What condition could cause the system to not respond to an adjustment to the expansion
valve?
30'' of vacuum to 250 psig
Ammonia compressor low side compund gauges are usually calibrated to read from:
in the generator
Where in an ammonia system would you find the strong liquor?
lower;isolating
Compare a typical gate valve to a typical globe valve in the same application in an operating
high pressure cooling water system, If both valves were fully open the gate valve will have a
______ pressure drop and is better choice for _______ flow
, an undersized condensor, an overcharge of refridgerant, insufficent cooling water to the
condenser (all of the above)
which of the following conditions can cause high discharge pressure in a system?
a decrease in capacity with an increase in head pressure
What condition would occur if a refrigeration system were to be overcharged with refrigerant
the area of the refrigerant coil, the amount of air flowing over the coil, the amount of heat
the entering air can absorb (all of the above)
Which of the following would be used to determine the capacity of an evaporative condenser?
relative humidity
The amount of water vapor that can be absorbed by the atmosphere under its current condition
is called?
it is capable of reaching very low temps
What is the main advantages of a cascade refrigeration system?
the kelvin scale
What temp scale is referred to as the absolute Celsius scale?
they cannot handle high viscosity liquids, their speed range is limited, they need priming
before startup (all of the above)
Which of the following would be considered a false statement concerning rotary pumps?
Viscosity index
The rate at which the viscosity of oil changes as its temp changes is called?
while the plant is running
When would be the best time to purge the condenser of an ammonia system?
more closed
Refer to the drawing of a spring operated valve shown in the throttled position:
60 cycles
What would be the cycles of a four pole motor rated at 150hp, 120 volts, running at 1800 rpms?
it varies according to the conditions under which it operates
VERIFIED ANSWERS 2026(GRADED A+)
DETAILED ANSWERS!!
sensible heat
What is the term for heat that increases the temp of refrigerant without causing a change of
state
The removal of 200 btus per minute
One ton of refrigeration is qual to:
dynamic head
What is the term used to describe the sum of the friction head, the velocity head, and the
pressure head?
The running windings
What Circuit(s) is (are)energized after the compressor motor reaches operating speed?
oil in the evaporator
What condition could cause the system to not respond to an adjustment to the expansion
valve?
30'' of vacuum to 250 psig
Ammonia compressor low side compund gauges are usually calibrated to read from:
in the generator
Where in an ammonia system would you find the strong liquor?
lower;isolating
Compare a typical gate valve to a typical globe valve in the same application in an operating
high pressure cooling water system, If both valves were fully open the gate valve will have a
______ pressure drop and is better choice for _______ flow
, an undersized condensor, an overcharge of refridgerant, insufficent cooling water to the
condenser (all of the above)
which of the following conditions can cause high discharge pressure in a system?
a decrease in capacity with an increase in head pressure
What condition would occur if a refrigeration system were to be overcharged with refrigerant
the area of the refrigerant coil, the amount of air flowing over the coil, the amount of heat
the entering air can absorb (all of the above)
Which of the following would be used to determine the capacity of an evaporative condenser?
relative humidity
The amount of water vapor that can be absorbed by the atmosphere under its current condition
is called?
it is capable of reaching very low temps
What is the main advantages of a cascade refrigeration system?
the kelvin scale
What temp scale is referred to as the absolute Celsius scale?
they cannot handle high viscosity liquids, their speed range is limited, they need priming
before startup (all of the above)
Which of the following would be considered a false statement concerning rotary pumps?
Viscosity index
The rate at which the viscosity of oil changes as its temp changes is called?
while the plant is running
When would be the best time to purge the condenser of an ammonia system?
more closed
Refer to the drawing of a spring operated valve shown in the throttled position:
60 cycles
What would be the cycles of a four pole motor rated at 150hp, 120 volts, running at 1800 rpms?
it varies according to the conditions under which it operates
