Topics: ASHRAE/CMR
1: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
2: R-717 is
- ammonia
- carbon dioxide
- trichloromethane
- water
3: What must be done to refrigerant pipes before being buried?
- Coated
- Encased
- Leaked checked
- Certified
4: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-123
- R-134A
- R-11
5: NH3 is
- ammonia
- lithium bromide
- R-508A
- R-718
6: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
7: What is an example of institutional occupancy?
- Hospital
- Football stadium
- Dorms
- Shopping mall
8: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 36'
- 15'
9: 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
- welder qualified
- licensed technician
- licensed welder
- competent welder
10: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
11: R-11 belongs to Group
- B-1
- A-2
- B-3
- A-1
12: Which occupancy can ammonia be used in?
- redifential
- industrial
- commercial
- depends on the quantity of freon
13: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
14: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 33
- 50
15: How many CFMs are required per square foot of commercial office occupied space
- 20 CFM
- 5 CFM
- 15 CFM
- .5 CFM
16: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 100
- 350
- 50
17: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
18: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on the oil used
- Based on best case Fractionation
- Blends don't have to be classified
19: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 10
- 18
- 24
20: Which refrigerant class listed below is the most flammable?
- C-3
- A-3
- A-1
- B-2
21: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
22: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When there is a space 6' or more above it
- When its white
- When it's used as part of a supply or return air system
23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- explosion precautions must be taken
- the owner shall be informed
- no flames shall be permitted
24: 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
25: R-22 falls under which safety classification?
- A-2
- B-2
- A-1
- B-1