EPA Type III

question

What type of equipment can be worked on with Type III certification?
answer

low pressure
question

The most efficient method of leak checking a charged low-pressure refrigeration unit is to
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pressurize the system by the use of controlled hot water or heater blankets
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When pressurizing a system, do not exceed
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10 psig
question

After reaching the required vacuum on an appliance when servicing, moisture is indicated by
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multiple rises in pressure over a period of time with increase of pauses between rises
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EPA required evacuation levels for recovery or recycling equipment manufactured or imported before Nov. 15, 1993 is
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25 inches Hg
question

EPA required evacuation levels for recovery or recycling equipment manufactured or imported on or after Nov. 15, 1993 is
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25 mm Hg absolute
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What can be used to pressurize a chiller system before opening the system for a non-major repair?
answer

controlled hot water
question

Refrigerant recovery from a system using R-11 or R-123 starts with
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liquid removal and is followed by vapor recovery
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If a strong odor is detected during the recovery process,
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a compressor burn-out may have occurred
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When installing more than one, pressure relief valves must be installed
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in parallel
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The owner must keep records of refrigerant added during service and maintenance on equipment
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with charges of 50 lbs. or greater
question

After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system
answer

100 lbs.
question

When charging a system with a low pressure refrigerant should be introduced as a vapor to raise saturation temperature to a minim of
answer

36 degrees
question

Where is the purge unit located in a low-pressure system?
answer

the top of the condenser
question

In a chiller, air and other noncondensables collect
answer

at the top section of the condenser
question

A rupture disk for low pressure chiller will rupture at
answer

15 psig
question

The Standard for machine room safety is
answer

ASHRAE-15
question

Who establishes the refrigerant safety group standard
answer

ASHRAE
question

A low pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of ____ of the total charge.
answer

15 percent
question

ASHRAE 34 Standard Safety classifies R-134a as
answer

A1
question

Because a low-pressure system operates below atmospheric pressure (in a vacuum),
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leaks in the gaskets or fittings will cause air and moisture to enter the system
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To repair a chiller operating with R-22 the technician
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must have a Type II certification
question

What refrigerant has a safety classification of B-1?
answer

HCFC 123 (R-123)
question

During evacuation of systems with large amounts of water, it may be necessary to
answer

increase pressure by introducing nitrogen to counteract freezing
question

When leak testing a low pressure chiller, the maximum pressure to use is
answer

10 psig

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