Deck 27: Commercial Ice Machines

Question 1

____ ice cube machines usually have vertical evaporator plates with water flowing over the individual cells.

A) Modular
B) Linear
C) Cell-type
D) Cup-type

Answer 1

C

Question 2

____ ice is normally made in a vertical refrigerated cylinder surrounded by the evaporator on the outside.

A) Solid
B) Cube
C) Flake
D) Chip

Answer 2

C

Question 3

Water levels can be sensed and controlled by a probe located in the water reservoir.

Answer 3

True

Question 4

A ____ is used to turn the auger in a flake ice machine.

A) step motor
B) geared motor
C) worm motor
D) hydraulic motor

Question 5

Microprocessors are often referred to as ____.

A) signal controllers
B) digital controllers
C) integrated device controllers
D) integrated circuit controllers

Question 6

Many filter manufacturers use ____ to inhibit calcium or lime scale buildup.

A) wool
B) polysorbate
C) polyphosphate
D) polyphenols

Question 7

Most package ice machines are designed to be located in ambient temperatures of ____.

A) 30ºF to 110ºF
B) 40ºF to 115ºF
C) 50ºF to 115ºF
D) 50ºF to 120ºF

Question 8

For maximum efficiency, individual ice machine models have different programs called algorithms stored in their ____ .

A) EEPROM
B) ERAM
C) EPRAM
D) PRAM

Question 9

____ are simply small computers that contain stored programs or algorithms.

A) Auto processors
B) Signal processors
C) Microcontrollers
D) Microprocessors

Question 10

Most ice flakers have a ____ that reduces the auger drive motor's speed from about 1725 rpm to 9 to 16 rpm .

A) gear improvement drive
B) gear intensive drive
C) gear shift drive
D) gear reduction drive

Question 11

____ 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

Question 12

Package ice machines store their own ice at ____ºF in a bin below the ice maker .

A) 10
B) 18
C) 24
D) 32

Question 13

____ between the evaporator cells allow air entering from the edges of the ice to travel along the entire ice slab and relieve the suction force.

A) Space holes
B) Weep holes
C) Release spots
D) Weep space

Question 14

Most package ice makers are ____-cooled .

A) water
B) air
C) moisture
D) refrigerant

Question 15

When using cleaning and sanitizing chemicals, it is unnecessary to wear protective clothing and eyewear .

Question 16

The gear motor assembly is less prone to failure than any other part in the ice flaker .

Question 17

Manufacturers of ice flakers install thermal overload controls in the motor windings or a manual-reset, current-type overload control .

Question 18

Ice-making machines are the same as ice-holding machines such as those seen on the outside of a convenience store or service station .

Question 19

The auger in a flake ice maker has cutting surfaces called ____.

A) flights
B) fins
C) shafts
D) gears

Question 20

It is important that the auger does not wobble within the freezing cylinder or evaporator

Question 21

What are the steps of for installing a package machine?

Question 22

Solid forms of ice last longer because there is more weight with less surface area.

Question 23

List some of the methods used for ice bin control .

Question 24

____________________-type devices are usually located in the spout.

Question 25

It is recommended that at least ____________________ a year, the probe should be removed from the water reservoir and cleaned.

Question 26

The ____________________ is usually made of two reed switches and two floats.

Question 27

Ice production, cycle times, and system operating pressures for an air-cooled ice machine mainly depend on two factors. Identify them ?

Question 28

____________________ controls use sound waves and vibrations, which are reflected back to the control from the ice .

Question 29

Ice is not considered a food source.

Question 30

Why is the gear motor assembly more prone to fail than any other part in the ice flaker ?

Question 31

____________________ sense the buildup of ice by infrared technology. This control allows the ice machine to shut down before the ice chokes the spout opening.

Question 32

When operating at the proper refrigerant charge, ice production in flake ice machines depends on two main factors. List these factors .

Question 33

How does the mechanical flapper work?

Question 34

Making a(n) ____________________-shaped ice cube involves running water over an evaporator plate in which the copper evaporator tubing is soldered onto the plates at regular intervals .

Question 35

Most ice makers use a hot gas harvest or defrost to melt an ice sheet off the evaporator.