Topics: ASHRAE/CMR
1: What refrigerant doesn't have to be classifted?
- R-711
- R-134a
- R-717
- R-718
2: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
3: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-1
- B-2
4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
5: High pressure controls should be set no higher than
- 80% of set point
- 90% of set point
- 10% of set point
- 25% of set point
6: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 25'
- 20'
- 15'
7: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
8: A class A3 refrigerant is considered
- non-toxic but highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
9: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
10: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 15
- 1
11: When must refrigeration system covered by the code be inspected?
- Annually
- Annually and when installed
- Not required
- Upon installation
12: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
13: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
14: R-22 is considered a(n)
- HFC
- HCFC
- HCFCH
- CFC
15: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
16: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- CCFCM
- HFC
17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Muffler
- Stop valve
- Moisture indicator
18: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
19: How many groups of refrigerants are there?
- 7
- 5
- 1
- 3
20: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
21: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 1,000
- 6.6
- 110
- 330
22: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless steel
- Magnesium alloy
23: 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
24: What refrigerant doesn't have to be classified?
- R-718
- R-422A
- R-717
- R-134A
25: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- regularly
- quarterly
- bi-annually