Topics: ASHRAE/CMR
1: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
2: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- relief plug
- rupture plug
- fusion plug
3: What happens after your initial inspection of a pressure vessel?
- Notify the AHJ to let them know that the system been inspected
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
4: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 80%
- 75%
- 90%
5: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
6: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- There is no minimum for relief valve and windows.
- At least 30'
- At least 20'
7: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 1000F
- 600F
- 700F
8: Pressure vessels having an inside diameter of 6” or less shall be protected by
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
- either a fusible plug or a pressure relief device
- a pressure relief device
9: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- 15
- 10
- III
10: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- ammonia
- CFC-11
- Lithium bromide
- HCFC-123
11: NH3 is
- lithium bromide
- R-718
- ammonia
- R-508A
12: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 400
- 250
- 100
- 350
13: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
14: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
15: Stop valves shall not be permitted between the system and the
- bleed valve
- service valve
- condenser
- relief valve
16: What kind of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Aluminum
- Stainless Steel
17: Who authorizes changes to the safety codes?
- Board of Boilers
- Person in charge of the facility
- Contractor who last serviced the system.
- Person who pulled the permit
18: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 15
- 50
- 75
- 20
19: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 1,000
- 6.6
- 110
20: R-22 is considered a(n)
- CFC
- HFC
- HCFC
- HCFCH
21: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
22: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
- explosion precautions must be taken
23: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- safe access
- manufactures instructions on start-up procedures
24: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
25: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety