EPA 608 Type III Practice Test
A rupture disk in a low-pressure system will open at which of the following psig?
A rupture disk breaks and releases pressure after exceeding a certain level. Pressure should not exceed 10 psig. Anything above 10 psig will result in a break and release of pressure.
With Type III certification, what kind of equipment can be worked on?
Technicians maintaining, servicing, repairing or disposing of lowpressure appliances must be certified as a Type III Technician or a Universal Technician. (Page 24 ESCO EPA 9TH V2 Edition Prep Manual)
Which of the following is used to cool the absorption chiller?
A heat source like steam is used to regenerate the absorption solution.
What is the machine room safety standard:
ASHRAE standard 15 requires a refrigerant monitor that will sound an alarm and automatically start a ventilation system in equipment rooms before the refrigerant concentration reaches the TLVTWA, (threshold limit valuetime weighted average). (Page 27 ESCO EPA 9TH V2 Edition Prep Manual)
All refrigerated recovery cylinders are approved by this agency:
The Department of Transportation (DOT) must approve all recovery cylinders.
When evacuating refrigerant, water must be circulated through the tubes to prevent:
Water from freezing.
Water must be circulated through the tubes when evacuating refrigerant in order to prevent freezing the water. (Page 26 ESCO EPA 9TH V2 Edition Prep Manual)
Which of the following types of compressors are open-drive compressors?
Open-drive compressors are typically reciprocating compressors. The motor is completely outside the body.
To repair an R-22 chiller, the technician must:
must have a Type II certification.
R-22 is a high-pressure refrigerant therefore type II certification is needed. R-11 and R-123 are low-pressure refrigerants. (Page 20 ESCO EPA 9TH V2 Edition Prep Manual)
Convert 5 tons of energy into BTUs every hour.
One refrigeration ton is equal to 12,000 BTUs per hour.
What temperature must be attained while removing oil from a low-pressure system?
130 degrees F.
A temperature of 130° F should be attained when removing oil from a lowpressure system. Less refrigerant is contained in the oil at this higher temperature. (Page 26 ESCO EPA 9TH V2 Edition Prep Manual)
An electronic leak detector can detect leaks at what rate per year?
Electronic detectors are very sensitive and can detect leaks in the .25 oz per year range.
For recovery or recycling equipment used on low-pressure systems, the EPA required evacuation level is:
25 mm of Hg absolute.
Recovery or recycling equipment manufactured or imported before or after Nov. 15, 1993, must be able to achieve a recovery level of 25mm Hg Absolute. (Page 26 ESCO EPA 9TH V2 Edition Prep Manual)
What is the time period for repairing substantial leaks?
Leaks must be repaired within 30 days of finding the leak.
When charging a low-pressure system, introduce refrigerant as a vapor to raise the system's saturation temperature to a minimum of;
Before charging with liquid, a refrigeration system requires a vapor pressure above a saturation temperature of 36° F. (Page 26 ESCO EPA 9TH V2 Edition Prep Manual)
What percentage or more of the normal charge for industrial and commercial refrigeration systems is a substantial leak?
35% is the threshold. For equipment that is not commercial or industrial, the threshold is 15%.
Which of the following best defines the R-123 system's refrigerant recovery process?
Start with liquid removal and then switch over to vapor recovery.
Refrigerant recovery from a system using R11 or R123 starts with liquid removal and is followed by vapor recovery. (Page 25 ESCO EPA 9TH V2 Edition Prep Manual)