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ACR 106 - Unit 27 - Commercial Ice Machines Mr. Graham

Total questions: 37

Worksheet time: 19mins

Name
Class
Date
1.

Package ice machines store their own ice at ____°F in a bin below the ice maker.

a)

10

b)

18

c)

24

d)

32

2.

Most package ice makers are ____-cooled.

a)

water

b)

air

c)

moisture

d)

refrigerant

3.

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

a)

Solid

b)

Cube

c)

Flake

d)

Chip

4.

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

a)

flights

b)

fins

c)

shafts

d)

gears

5.

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

a)

step motor

b)

geared motor

c)

worm motor

d)

hydraulic motor

6.

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

7.

____ 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

8.

____ 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

9.

____ 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

10.

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

a)

Auto processors

b)

Signal processors

c)

Microcontrollers

d)

Microprocessors

11.

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

a)

EEPROM

b)

ERAM

c)

EPRAM

d)

PRAM

12.

12. Microprocessors are often referred to as ____.

a)

integrated circuit controllers

b)

the heart of the computer

c)

the memory of the computer

d)

the power supply of the computer

13.

Which of the following are integrated circuit controllers?

a)

signal controllers

b)

digital controllers

c)

integrated device controllers

d)

integrated circuit controllers

14.

Many filter manufacturers use (a)   to inhibit calcium or lime scale buildup.

Choose from the below words

wool

polysorbate

polyphosphate

polyphenols

15.

Most package ice machines are designed to be located in ambient temperatures of (a)   .

Choose from the below words
40°F to 115°F

40°F to 110°F

50°F to 115°F

50°F to 120°F

16.

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

a)

True

b)

False

17.

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

a)

True

b)

False

18.

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

a)

True

b)

False

19.

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

a)

True

b)

False

20.

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

a)

True

b)

False

21.

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

a)

True

b)

False

22.

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

a)

True

b)

False

23.

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

a)

True

b)

False

24.

Ice is not considered a food source.

a)

True

b)

False

25.

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

a)

twice

b)

once

c)

three times

d)

four times

26.

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

a)

dual float switch

b)

single float switch

c)

triple float switch

d)

quad float switch

27.

26. ________________-type devices are usually located in the spout.

a)

Mechanical flapper

b)

Electronic sensor

c)

Hydraulic valve

d)

Pneumatic actuator

28.

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

a)

Sensors

b)

Thermostats

c)

Valves

d)

Compressors

29.

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

a)

Sonar

b)

Radar

c)

Laser

d)

Infrared

30.

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.

a)

crescent

b)

square

c)

circular

d)

triangular

31.

30. What are the steps for installing a package machine?

a)

Set and level the machine, Supply power, plug, or hardwire, Provide a water supply, Provide a drain for the ice bin.

b)

Read the manual, call a technician, wait for installation, start using

c)

Order the machine, receive it, leave it in the box, use it

d)

None of the above

32.

31. List some of the methods used for ice bin control.

a)

Thermostat control, Timer control, and Manual control

b)

Pressure control, Humidity control, and Light control

c)

Sound control, Vibration control, and Motion control

d)

Temperature control, Speed control, and Volume control

33.

Devices used in commercial ice machines include:

a)

Compressors, condensers, evaporators, and expansion valves

b)

Motors, gears, belts, and pulleys

c)

Heaters, thermostats, and fans

d)

Pumps, filters, and hoses

34.

How does the mechanical flapper work?

a)

By pressure and activate a microswitch

b)

By rotating continuously

c)

By vibrating to create sound

d)

By expanding and contracting

35.

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

a)

Ambient temperature and water temperature

b)

Refrigerant type and machine size

c)

Ice thickness and machine age

d)

Water quality and maintenance schedule

36.

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

a)

It is the most complex part.

b)

It operates under high stress.

c)

It is made of inferior materials.

d)

It is rarely maintained.

37.

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

a)

Temperature of the air entering the condenser.

Temperature of the water entering the ice machine.

b)

Refrigerant type and compressor size

c)

Voltage supply and fan speed

d)

Ice bin size and water filter type