Topics: ASHRAE/CMR
1: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
2: What would be the classification of a church?
- Industrial
- Place of assembly
- Large mercantile
- Institutional
3: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- T&P device
- Circuit Breaker
- Temperature limiter device
4: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- outside the machinery room
- evaporator
- boiler
- compressor
5: When must refrigeration system covered by the code be inspected?
- Annually
- Not required
- Upon installation
- Annually and when installed
6: What type of relief valve is used on a CO2 system?
- fusible plug
- rupture disc
- glove disc
- gate valve
7: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
8: B3 refrigerants are considered
- toxic and highly flammable
- non-toxic but flammable
- non-toxic but non-flammable
- toxic but non-flammable
9: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- Department of Energy
- OSHA
10: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Inspected
- Pressurized
- Leak tested
11: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the liquid side of the system
- the vapor side of the system
- low side of the system
12: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
13: Which refrigerant replaced R-12?
- R-410A
- R-134A
- R-407A
- R-22
14: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 6'
- 72"
- 7.25'
15: Who is permitted to access a refrigeration machine room?
- Contractors only
- Authorized persons only
- Anyone, it's a completely safe area
- Any employee
16: A professional or office building would be considered what type of occupancy?
- mercantile
- public assembly
- business
- commercial
17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Muffler
- Stop valve
- Foot valve
18: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
19: What kind of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Aluminum
- Stainless Steel
20: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- moisture barrier
- insulated
- leak checked
21: Direct systems using Group II refrigerants
- shall be installed in Class T machinery rooms
- shall be installed per instruction of the AHJ
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
22: Stop valves shall not be permitted between the system and the
- condenser
- relief valve
- bleed valve
- service valve
23: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use fusible plugs
24: R-22 falls under which safety classification?
- A-2
- B-1
- B-2
- A-1
25: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UV”
- “UL”
- “UM” and “UV”
- “U” or “UM”