Topics: ASHRAE/CMR
1: 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.
- 550
- 100
- 350
- 50
2: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 25
- 15
- 10
3: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
4: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
5: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 15'
- 10'
6: The certificate of inspection
- 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
- shall be $20 and an additional fee of $1 for each tone above 20 tons
7: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Upon installation
- Not required
- Annually
8: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 2.5, 2.5
- 6.6, 6.6
- 2.5, 3.0
- 3.0, 3.5
9: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
10: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 7.25'
- 6'
- 72"
11: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
12: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
13: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
14: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
15: How many different groups of refrigerants are there?
- 15
- 3
- 7
- 11
16: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-2
- B-1
- A-1
17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 1000F
- 700F
- 800F
18: R-22 falls under which safety classification?
- A-1
- A-2
- B-1
- B-2
19: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
20: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Fusible plug
- Gate valve
21: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
22: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
23: 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
24: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
25: 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