Topics: ASHRAE/CMR
1: Can ammonia be used on domestic system?
- yes
- no, unless there is proper ventilation system installed
- no
- yes, for systems under 10 tons
2: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
3: Most CFC's are
- flammable
- inert but toxic
- toxic
- inert
4: 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
- welder qualified
- licensed welder
- competent welder
5: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
6: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-502
- R-113
7: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 6'
- 72"
- Ceiling height
8: A hotel is considered a _______ occupancy.
- residential
- commercial
- mercantile
- institutional
9: Class A refrigerants are considered
- non-flammable
- toxic
- non-toxic
- flammable
10: What refrigerant is an inorganic compound?
- R-132A
- Ammonia
- R-22
- R-410A
11: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
12: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- zone valve
- low limit control
- high limit control
13: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 30 days
- 2 months
- 1 week
14: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- place sign, check for leaks, insulate
- you can't change refrigerants
15: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
16: The color code of a tank of ammonia is
- lavender
- light green
- white
- silver
17: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
18: What happens after your initial inspection of a pressure vessel?
- 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 Fire Marshal that the system has been inspected and approved
- Notify the AHJ to let them know that the system been inspected
19: How many refrigerant classifications are there for flammability?
- 2
- 3
- 1
- 7
20: 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
21: 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
- institutional occupancy
- illegal occupancy
22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
23: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 20
- 15
- 25
24: Ammonia belongs to Group
- A-1
- B-1
- A-2
- B-2
25: How many gallons of water do you need per pound of ammonia?
- 10
- 50
- 1
- 100