Topics: ASHRAE/CMR
1: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
2: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 250
- 400
- 350
3: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
- a pressure relief device
4: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-134A
- R-407A
5: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Copper
- Zinc
6: 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
7: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
8: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “UV”
- “U” or “UM”
- “UM” and “UV”
9: What refrigerant were phased out in 2004?
- R-11
- R-22
- R-12
- R-134a
10: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 660 lbs
- 55 lbs
- 330 lbs
11: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 18 months
- every 24 months
12: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
13: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
14: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's water
15: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 10
- 25
16: Most CFC's are
- inert but toxic
- toxic
- flammable
- inert
17: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
18: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-718
- R-711
19: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-134a
- R-123
20: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
21: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 20'
- At least 30'
- There is no minimum for relief valve and windows.
- At least 40'
22: How many refrigerant classifications are there for flammability?
- 3
- 1
- 7
- 2
23: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Have it inspected
- Document the superheat and subcooling reading
24: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Insulated and installed in a pipe duct (Encased)
- Certified
- Leak checked
- Classifed
25: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above