Topics: ASHRAE/CMR
1: R-123 belongs to Group
- B-1
- A-3
- B-3
- B-2
2: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Fusible plug
- Gate valve
3: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
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 welder
- competent welder
- licensed technician
- welder qualified
5: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 6.6
- 330
- 1,000
6: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 30'
- At least 40'
- There is no minimum for relief valve and windows.
- At least 20'
7: A hotel is considered a _______ occupancy.
- mercantile
- residential
- institutional
- commercial
8: What would be the classification of a church?
- Large mercantile
- Place of assembly
- Industrial
- Institutional
9: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
10: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
11: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall be prohibited
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
12: Refrigerants shall be classified by
- requirements for commercial, industrial, and residential occupancies
- toxicity and flammability
- color codes
- maximum permissible quantities of each group
13: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When it's used as part of a supply or return air system
- When there are sprinklers above
- When there is a space 6' or more above it
14: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on worst case fractionation
- Based on the oil used
- Based on best case Fractionation
15: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
16: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
17: What section governs pressure vessels?
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
18: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 7.25'
- 6'
- 72"
19: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- Machinery rooms need not be vented
- the outdoors
- the mechanical room housing the refrigeration system
20: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
21: Which refrigerant class listed below is the most flammable?
- A-3
- A-1
- C-3
- B-2
22: Liquid level gauges must be provided with what?
- A relief valve
- A low level mark
- Automatic shut-offs
- A red line
23: When should a relief valve start to function?
- Before the purge station discharges
- 10 psi before it's set pressure
- Two times it's working pressure
- At it's set pressure
24: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
25: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly