Topics: ASHRAE/CMR
1: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
2: R-717 is
- trichloromethane
- water
- carbon dioxide
- ammonia
3: Class A refrigerants are considered
- flammable
- non-toxic
- non-flammable
- toxic
4: Which refrigerant replaced R-12?
- R-407A
- R-410A
- R-22
- R-134A
5: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter an unoccupied 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
- is a system highly likely to leak form a failed connection or component of such system
6: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
7: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- load-side of the contactor in
- breaker panel in
- first disconnect in
8: 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
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
9: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-134A
- R-12
- R-22
10: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 25
- 10
11: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 18"
- 24"
- 12"
12: 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
- welder qualified
- competent welder
- licensed welder
- licensed technician
13: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
14: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
15: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- quarterly
- regularly
- bi-annually
16: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
17: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Temperature limiter device
- T&P device
- Circuit Breaker
18: 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
- shall be prohibited
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
19: How many refrigerant classifications are there for toxicity?
- 3
- 1
- 2
- 5
20: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
21: What is Trichlorotrifluoromethane?
- R-113
- R-12
- R-13
- R-11
22: Which refrigerant class listed below is the most flammable?
- B-2
- A-3
- C-3
- A-1
23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- relief plug
- fusion plug
- rupture plug
24: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Have it inspected
25: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 3/32"
- 1/16"