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Refrigeration License Review 2024 Questions & Answers Rated 100% Correct!!
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Refrigeration License Review 2024 Questions & Answers Rated 100% Correct!!
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Name: Score:300 Multiple choice questions
Term 1 of 300
Flow switches are located in?
The chilled water and condenser water lines
The chilled water return from the conditioned space from the thermostat will energize the
solenoid valve.
high volume and low pressure (relative) inside.
make up for pressure drop in the evaporator
Term 2 of 300
Oil flashpoint temperature in the compressor should be ?
equal to the heat absorbed
the formation of scale and algae
higher than the heat of compression
liquid slugging in the compressor
Term 3 of 300
Oil with low viscosity would ?
the evaporative type
the spring type tube bender would be used to bend the tubing
not be used for refrigeration
causes no corrosion
,Term 4 of 300
shell and coil condensers have the advantage of?
having less of a chance of developing leaks.
being more expensive to manufacture.
being less efficient in cooling compared to other types.
requiring more maintenance over time.
Term 5 of 300
the amount of ventilation for refrigerant removal purposes in a machine room shall be sized
according to?
the thermostatic expansion valve (txv)
The amount of refrigerant in the largest machine.
3.47 ( round off to 3.50:1) ???
you will have insufficient head to lift the oil.
Definition 6 of 300
the pressure increases with each stage
On a centrifugal water pump the conditions are fully primed when it?
in a centrifugal 3 stage compressor impeller are the same size but
the center port of the gauge manifold can be connected to a ?
An electrical wiring schematic diagram shows?
,Term 7 of 300
a tachometeris used to track ?
speed of a steam turbine
compressor capacity
vacuum for the steam exhaust
4 leads 2 for volts and 2 for amps/current
Term 8 of 300
a centrifugal pump is considered a ?
axial piston pump
gear pump
non-positive displacement pump
centrifugal pump
Term 9 of 300
Concerning leakage, a gate valve ?
freezing will not occur.
causes more leakage.
malfunctioning of the water makeup float valve.
the evaporator would flood.
, Term 10 of 300
what is the advantage of shell and tube condensers?
protect from being inadvertently turned from its position and from being damaged
they have the advantage of being able to remove the heads for cleaning the water side of
the tubes and the refrigerant connections does not have to be disrupted.
to remove moisture
variable inlet vanes speed control can also be used.
Term 11 of 300
what does oil in a refrigeration system do?
it improves the system's insulation
it increases the system's efficiency
it helps regulate the refrigerant flow
it reduces wear and friction lubricates bearings, like skateboards
Term 12 of 300
an operator has been assigned to run a reciprocating compressor. what is the achieved action of
capacity control?
heat of evaporation in the cooling tower
adjusting the motor speed using a remote control is a typical achieved action of capacity
control
turbine in the event of the rpms reaching over the maximum speed
opening the suction valves with some form of control is the most likely achieved action of
capacity control
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