Topics: ASHRAE/CMR
1: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- magnesium
- black iron
- copper
2: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 3
- 5
3: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-11
- R-12
- R-22
5: Which refrigerant class listed below is the most flammable?
- A-1
- C-3
- B-2
- A-3
6: When an inspection is needed, how often must it be done?
- every 36 months
- every 24 months
- every 18 months
- annually
7: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 330
- 150
8: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
9: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Uniforms, checks, and invoices.
10: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
11: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- commercial occupancy
- public assembly occupancy
- illegal occupancy
- institutional occupancy
12: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
13: What refrigerant were phased out in 2004?
- R-11
- R-22
- R-134a
- R-12
14: How many refrigerant classifications are there for toxicity?
- 2
- 1
- 3
- 5
15: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- low limit control
- pressure relief device
- high limit control
16: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
17: Fusible plugs shall not be used with pressure vessels of
- 15 square feet or less
- 3 cubic feet or less
- 3 cubic feet or more
- 15 cubic feet or more
18: The Board of Boilers adopts by reference
- MSCA Code
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
19: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Rupture disk
- Glove valve
- Fusible plug
20: What refrigerant doesn't have to be classified?
- R-134A
- R-422A
- R-717
- R-718
21: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
22: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices
23: 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
24: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
25: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved