Topics: ASHRAE/CMR
1: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- mercantile occupancy
- commercial occupancy
- public assembly occupancy.
2: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
3: A class A3 refrigerant is considered
- non-toxic but highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
4: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- there is no Group B1 refrigerants
- higher
- the same
- lower
5: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- between the compressor and reciever
- between the compressor and oil separator
- on top of the condensor
6: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-134A
- R-123
- R-11
7: R-22 falls under which safety classification?
- A-1
- B-2
- A-2
- B-1
8: What refrigerant doesn't have to be classifted?
- R-134a
- R-717
- R-711
- R-718
9: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 75%
- 100%
10: Machinery rooms must be vented to ______?
- basement
- neutralizing tank
- unoccupied spaces
- outdoors
11: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- compressor
- evaporator
- boiler
- outside the machinery room
12: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
13: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
14: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
15: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
16: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
17: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- 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
- a pressure relief device
18: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 50
- 66
- 22
19: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
21: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
22: Which refrigerant class listed below is the most flammable?
- A-3
- C-3
- A-1
- B-2
23: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Certified
- Insulated and installed in a pipe duct (Encased)
- Classifed
24: 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
- 550
- 100
- 350
25: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Locked doors
- Well-lit exit signs