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Exam 11: Leak Testing

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Question 1

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Match the leak detection tool to its function.

Premises

Responses

is brushed onto the piping circuit, primarily at solder joints

ultrasonic leak detector

ultraviolet leak detection

gauge manifold

soap bubbles

halide leak detector

electronic leak detector

Premises

is brushed onto the piping circuit, primarily at solder joints

Responses

ultrasonic leak detector

ultraviolet leak detection

gauge manifold

soap bubbles

halide leak detector

electronic leak detector

Show Answer

Correct Answer

Premises

Responses

ultrasonic leak detector

ultraviolet leak detection

gauge manifold

soap bubbles

halide leak detector

electronic leak detector

Premises

ultrasonic leak detector

ultraviolet leak detection

gauge manifold

soap bubbles

halide leak detector

electronic leak detector

Responses

Question 2

Short Answer

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Review Later

With the standing pressure test, the __________ the system stays under pressure, the more reliable the leak-check will be. On residential systems, __________ should be more than sufficient time for even the smallest leak to cause movement on the gauge. If at all possible, the system should be under pressure __________ to ensure that the system is leak-free prior to startup. If a _________ leak is present, the pressure in the system will begin to drop rapidly. __________ leaks may require much more time to show up on the gauge.

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longer, an...

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Question 3

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Leak-checking a system prior to startup is an absolute must, especially when refrigerant lines are to be __________.

To comply with laws set forth by the EPA, the technician should __________ pressurize a system for leak-checking purposes with 100 percent refrigerant.

Match the leak detection tool to its function.

Air conditioning and refrigeration systems are intended to operate with the correct amount of refrigerant to help ensure efficient operation. List six problems that can result if a system operates from a deficiency of refrigerant.

When a soap bubble solution is used to detect leaks in a system, the solution is __________ or __________ onto the piping circuit, primarily at __________. The formation of bubbles indicates that __________.

The desired relative humidity in an occupied space is in the __________% to __________% range, with ___________% being ideal.

List the steps for performing the standing pressure test, in the proper order.

The pressure that is used during the standing pressure test must not exceed the __________ factory test pressure.

Match the leak detection tool to its function.

The __________ method of leak detection is primarily used on systems that have already been put into service,

A relative humidity over __________ greatly increases the chances of allowing mold to grow in the occupied space.

The leak detection method that is widely accepted in the field for performing a leak-check on a newly installed, assembled or repaired system is the __________.

With the soap bubble method of leak detection,

The electronic leak detector has the ability to locate leaks as small as __________ ounce per year.

Match the leak detection tool to its function.

Explain why leak testing a system is often one of the most difficult tasks a service technician can face.

Match the leak detection tool to its function.

Provide the formula by which The relative humidity is calculated.