Ice Machine
What is the most common type of defrost during an ice maker harvest cycle?
A. Electric
B. Natural
C. Hot gas
D. Air
Hot gas
Refrigeration can be described as ____.
a.the process of making products cold
b.the process of introducing heat to a location where it is not wanted
c.the process of removing heat from a place where it is not wanted to a place where it makes little or no difference
d.None of the above.
c.the process of removing heat from a place where it is not wanted to a place where it makes little or no difference
Good ventilation is important when working around refrigeration equipment because modern refrigerants ____.
a.are toxic and can poison you
b.have an unpleasant odor
c.are heavier than air and may displace the oxygen around you
d.Both a and c.
c.are heavier than air and may displace the oxygen around you
How many microns are you required to pull a vacuum down to? ______________
500
What does CTOA stand for?
Condenser temp over ambient
What material is often used for evaporators due to its durability and resistance to corrosion?
A. Copper
B. Brass
C. Aluminum
D. Stainless Steel
D. Stainless Steel
A ton of refrigeration is equal to ____.
a.1 ton of ice
b.288,000 Btu/12 hr
c.144 Btu/h
d.12,000 Btu/1 hr
d.12,000 Btu/1 hr
The law requires technicians to recover refrigerant from all refrigeration systems so that they ____.
a.will not be released into the atmosphere
b.may be used again
c.may be reclaimed for future use
d.All of the above.
d.All of the above.
When brazing, what should you always ensure that you flow through the copper tubing?______________
nitro
how much pressure should you use when doing a pressure test?
At least the pressure equal to the design low side.
Ice production in an ice flake machine depends mainly on two factors. Name these two factors.
A. Water outlet temperature and ambient temperature
B. Water outlet temperature and water level
C. Water inlet temperature and ambient temperature
D. Water inlet temperature and water level
C. Water inlet temperature and ambient temperature
The evaporator in a refrigeration system ____.
a.reduces the boiling point of the refrigerant
b.condenses the refrigerant
c.absorbs heat from the product to be cooled
d.compresses the refrigerant vapor
c.absorbs heat from the product to be cooled
8. The evaporator in a refrigeration system must be colder than the refrigerated space in order to absorb heat.
a.True
b.False
True
What size wire do you need for 30 amps?
10 awg
Why do we use pee trap in drain?
Which type of ice maker has a continuous harvest cycle?
Cube ice
Flake ice
Block ice
Cylindrical ice
Flake ice
The condenser ____.
a.rejects the heat from the refrigerant
b.controls the refrigerant flow throughout the system
c.adds superheat to the refrigerant
d.All of the above.
a.rejects the heat from the refrigerant
Only liquid refrigerant should enter the metering device.
a. True
b. False
True
Why do we pull a vacuum?
To remove non condensables like moisture.
If a king valve is front seated, will the gauge hook up port be open to allow refrigerant to come out?
yes
____ evaporators have ice cups designed to cause the ice to fall out of the cups during defrost.
a.Vertical
b.Horizontal
c.Hybrid
d.Linear
a.Vertical
When a refrigerant enters the compressor, it is a ____ and when it leaves the compressor, it is a ____.
a.low pressure low temperature superheated vapor, high pressure high temperature superheated vapor
b.low pressure low temperature superheated vapor, low pressure low temperature subcooled vapor
c.high pressure superheated vapor, low pressure superheated vapor
d.low pressure low temperature subcooled liquid, high pressure high temperature superheated vapor
a.low pressure low temperature superheated vapor, high pressure high temperature superheated vapor
The four (4) major components of a vapor compression refrigeration system are the compressor, condenser, evaporator, and ____________________.
Meter
When hooking up power to a new unit. What should you check to ensure the wire is correct? _________________
What else should you check at the panel?_____________
Size of wire, size of breaker
What is a cut in / cut out switch for?