Topics: ASHRAE/CMR
1: 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
2: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When its white
- When there is a space 6' or more above it
- When there are sprinklers above
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Nothing must be done
- Place sign, check for leaks, and insulate suction line
4: 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
5: What do you need to do when you install a new system?
- Have it inspected
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Add refrigerant
6: Class A refrigerants are considered
- flammable
- toxic
- non-toxic
- non-flammable
7: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- MSCA Code
8: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
9: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Person in charge of the facility
- Board of Boilers
- Contractor who last serviced the system.
10: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
11: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
12: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
- Yes, always
13: Pressure vessels having an inside diameter of 6” or less shall be protected by
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
- either a fusible plug or a pressure relief device
- a fusible plug
14: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- phosgene gas sening
- refrigerant sensing
- CO Sensing
15: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
16: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
17: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and toxicity
- Weight and color
- Flammability and temperature range
18: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
19: What refrigerant is an inorganic compound?
- R-410A
- R-132A
- R-22
- Ammonia
20: 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.
21: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
22: 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.
- 50
- 100
- 350
- 550
23: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless steel
- Magnesium alloy
24: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 22 lbs
- 13.9 lbs
- 44 lbs
25: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50