Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UR
- UV or UR
- UL and UM
2: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- higher
- lower
- there is no Group B1 refrigerants
3: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
4: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 100
- 330
- 200
5: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- 10 psi before it's set pressure
- At it's set pressure
6: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- commercial
- redifential
- industrial
7: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- moisture barrier
- insulated
- leak checked
8: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
- Not more than 3' above grade
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
- licensed technician
- competent welder
- welder qualified
- licensed welder
10: Who is permitted to access a refrigeration machine room?
- Anyone, it's a completely safe area
- Contractors only
- Any employee
- Authorized persons only
11: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 5/16"
- 1/16"
- 3/32"
12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 660 lbs
- 55 lbs
13: R-22 is considered a(n)
- CFC
- HFC
- HCFC
- HCFCH
14: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Pressurized
- Inspected
- Leak tested
15: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-113
- R-502
16: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- explosion precautions must be taken
- gas masks must be worn
- no flames shall be permitted
17: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
18: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
19: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
20: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
21: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
22: R-11 belongs to Group
- B-1
- B-3
- A-1
- A-2
23: 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.
- 90
- 110
- 80
- 100
24: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
25: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified