Topics: ASHRAE/CMR
1: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
- explosion precautions must be taken
2: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
3: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- high limit control
- zone valve
4: Ammonia belongs to Group
- A-2
- B-1
- A-1
- B-2
5: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed technician
- licensed welder
- welder qualified
- competent welder
6: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- boiler
- compressor
- evaporator
- outside the machinery room
7: A High-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
8: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
9: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
10: What refrigerant were phased out in 2004?
- R-134a
- R-11
- R-12
- R-22
11: A Low-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter the occupied space
12: Indirect systems using Group II refrigerants
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only
13: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
14: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
15: Class 3 refrigerants are
- highly flammable
- toxic
- non-flammable
- non-toxic
16: A restaurant is classified as a
- large mercantile occupancy
- mixed occupancy
- commercial occupancy
- public assembly occupancy
17: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 80%
- 90%
- 99%
18: The Department that certifies the transportation of refrigerant is the
- DOT
- RSES
- EPA
- EPO
19: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-134a
- R-717
20: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
21: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
22: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
23: Who authorizes changes to the safety codes?
- Board of Boilers
- Contractor who last serviced the system.
- Person who pulled the permit
- Person in charge of the facility
24: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
25: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 80
- 100
- 110
- 90