Most package ice makers are ____-cooled.

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

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

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

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

____ evaporators have ice cups designed to cause the ice to fall out of the cups during defrost.

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

_____ 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.

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

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

12. Microprocessors are often referred to as _____

Which of the following are used as controllers in commercial ice machines?

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

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

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

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

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

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

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

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

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

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

Ice is not considered a food source.

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

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

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

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.

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

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.

Which of the following lists the correct steps for installing a package machine?

Some of the methods used for ice bin control are:

How does the mechanical flapper work?

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

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

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

The evaporator of a chiller can be used to absorb heat from ____.

Two basic categories of chillers are the ____.

A benefit of operating a compressor unloaded is ____.

A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.

Speeds up to rpm are used in centrifugal compressors.

A centrifugal compressor uses for capacity control.

7. Direct expansion evaporators have .

The compressors used in low pressure chillers are the ____ type.

When a chiller using a low-pressure refrigerant is operating, the low pressure side of the system ____.

A purge unit ____.

To unload a reciprocating compressor, hot gas bypass across the cylinder is the best method.

When referring to evaporators, the terms "direct expansion" and "dry type" can be used interchangeably.

High pressure chillers use either air- or water-cooled condensers.

Thermostatic expansion valves are the only metering devices used in high pressure chillers.

Low pressure chillers use either air- or water-cooled condensers.

Lithium bromide is ideal for use in absorption systems because it is non-corrosive.

Electronic starters are much smaller than conventional starters.

A chiller typically cools ____________________ for the purpose of air conditioning.

In centrifugal compressors, capacity control is accomplished by the use of __________________________________________ at the impeller inlet.

The pressure difference in a low-pressure chiller is produced by a(n) ____________________ compressor.

The device that automatically helps to remove non-condensables from a chiller is called a(n) ____________________.

The pressure difference in an absorption chiller where the source of energy is steam or hot water is produced with the use of a(n) ____________________ solution.

The refrigerant in an absorption chiller whose source of energy is steam or hot water is _____________________.

Multiple smaller compressors are sometimes preferred over one large compressor because:

A compressor that is equipped with unloaders accomplishes which of the following?

What is the reason to use cylinder unloading in high pressure chillers? (Fill in the blank)

Since there are no "valves" in a scroll compressor, what must be done to prevent refrigerant from flowing backward when the compressor cycles off?

Why are open-drive compressors often started up for a short time in the off season?

Centrifugal compressors are designed with the lubrication isolated from the refrigerant vapor. Why? (Fill in the blank)

Explain the difference, with respect to superheat, between a dry type evaporator and a flooded evaporator.

In a lithium bromide system, the refrigerant boils at 40°F. What is the corresponding absolute pressure required?

The capacity of a screw compressor is controlled by:

In high-pressure, low-pressure, and absorption chilled-water systems, how is the capacity controlled?