Free Practice Quiz Question List

9 Universal Certification Practice Exam Online Quiz Questions

Use this free practice quiz with 20 questions to review 9 Universal Certification Practice Exam, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

As a general rule, intentionally releasing refrigerant to the atmosphere while servicing stationary refrigeration equipment is prohibited, subject to limited exceptions.

A
True
B
False

Fill in the blank

1 point

In the stratosphere, CFCs can release when broken down by .

Choose all

1 point

Select all characteristics that belong to the general Section 608 definition of a small appliance.

A
It is factory-manufactured.
B
It is charged with refrigerant.
C
It is hermetically sealed.
D
It contains five pounds or less of refrigerant.
E
It contains more than five pounds of refrigerant.

Written response

1 point

What minimum percentage of refrigerant must EPA-certified recovery equipment be capable of recovering from a small appliance with a functioning compressor?

Choose one

1 point

A technician is about to add a different refrigerant to a recovery cylinder that already contains refrigerant. What is the principal reason to avoid doing this?

A
Mixing guarantees that the refrigerants will be easier to reclaim.
B
The mixture can be difficult or impossible to identify and reclaim properly.
C
Mixing always lowers cylinder pressure to zero.
D
All refrigerants are required to be mixed before shipment.

Choose all

1 point

A technician is preparing to pressure-test a refrigeration system. Select all the appropriate practices.

A
Use dry nitrogen.
B
Use a regulator.
C
Use suitable pressure controls.
D
Use oxygen to reach the test pressure more quickly.
E
Use compressed air if the system is empty.

Written response

1 point

Before removing oil from a refrigeration appliance, reduce its refrigerant pressure to no greater than what value?

Fill in the blank

1 point

After a low-pressure appliance reaches its required recovery vacuum, wait briefly and check whether pressure ; this may indicate refrigerant remains in liquid or oil.

True or false

1 point

During chiller evacuation, circulating or removing water helps prevent water in the tubes from freezing as system pressure and temperature fall.

A
True
B
False

Open ended

1 point

During recovery, a technician finds a leak and cannot reach the specified evacuation level without substantially contaminating the recovered refrigerant. What general procedure should the technician follow?

Choose one

1 point

A technician is deciding whether to add refrigerant beyond a recovery cylinder's permitted fill limit. Why must the technician stay within that limit?

A
Warming refrigerant expands it, and an overfilled cylinder can develop dangerous pressure.
B
The cylinder will lose its color code.
C
The refrigerant will become a noncondensable gas.
D
Recovery equipment cannot detect an overfilled cylinder.

True or false

1 point

When charging a zeotropic refrigerant blend, liquid charging may be needed to reduce fractionation and preserve the blend's intended composition; the technician should follow the refrigerant and equipment instructions.

A
True
B
False

Choose one

1 point

A technician needs to pressure-test a refrigeration system. Which gas should the technician use with suitable pressure controls?

A
Oxygen
B
Compressed air
C
Dry nitrogen with a regulator
D
Propane

Written response

1 point

When ultraviolet radiation breaks down CFCs in the stratosphere, which element is released and contributes to ozone destruction?

Choose one

1 point

A technician removes refrigerant from equipment, cleans some for reuse, and sends some for processing and verification against a purity standard. Which option correctly identifies these three activities?

A
Recovery removes refrigerant; recycling cleans it for reuse; reclamation processes and verifies it to a specified purity standard.
B
Recovery and reclamation both mean venting; recycling means storing refrigerant.
C
Recycling verifies refrigerant to the same standard as reclamation.
D
Reclamation means a technician uses a filter-drier alone.

Written response

1 point

A factory-made, charged, hermetically sealed appliance is being classified under the Section 608 small-appliance definition. What is the maximum refrigerant charge, in pounds, for it to meet that definition?

Choose one

1 point

A technician has refrigerant left over from two different systems. Why should the technician keep the refrigerants in separate recovery cylinders?

A
Mixing guarantees that the refrigerants become nonflammable.
B
The mixture can be difficult or impossible to identify and reclaim properly.
C
Mixing reduces the cylinder pressure to zero.
D
All refrigerants must be mixed before shipment.

Choose one

1 point

Recovery begins on a system containing both liquid and vapor refrigerant. Which approach generally speeds recovery while still allowing the technician to complete the recovery procedure?

A
Recover the available liquid refrigerant first, then continue as required.
B
Recover vapor only and leave all liquid in the system.
C
Open the system to the atmosphere to speed the process.
D
Heat the recovery cylinder with a torch.

Choose one

1 point

A technician is evacuating a chiller that contains water in its tubes. Why should the technician circulate or remove the water during evacuation?

A
It helps prevent water from freezing in the tubes as pressure and temperature fall.
B
It increases the refrigerant's ozone-depletion potential.
C
It forces refrigerant into the purge unit.
D
It raises the vacuum pump's oil level.

Choose one

1 point

A low-pressure chiller's purge unit begins operating much more frequently than usual. What problem should the technician consider?

A
Air or other noncondensables may be entering the system, potentially through a leak.
B
The system must contain too much oil.
C
The recovery cylinder is underfilled.
D
The water circuit is necessarily operating normally.

9 Universal Certification Practice Exam Online Quiz Questions

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