Topics: ASHRAE/CMR
1: What refrigerant doesn't have to be classified?
- R-717
- R-422A
- R-718
- R-134A
2: Most CFC's are
- inert
- inert but toxic
- flammable
- toxic
3: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UR
- UV or UR
- UL and UM
4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
5: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
6: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
- the mechanical room housing the refrigeration system
7: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
8: What section of ASHRAE-15 governs pressure vessels?
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
9: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Welded and seamed.
- Ducted and sealed
10: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Anyone, it's a completely safe area
- Contractors only
11: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Rupture disk
- Fusible plug
- Gate valve
12: Relief valves are rated in
- gallons of water per hour
- pounds of air per minute
- gallons of water per minute
- pounds of air per hour
13: The Board of Boilers adopts by reference
- MSCA Code
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
14: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 1,000
- 6.6
- 330
15: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Certified
- Insulated and installed in a pipe duct (Encased)
- Leak checked
16: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 12"
- 36"
- 18"
17: What type of copper is not permitted on refrigeration systems?
- Type K
- Type M
- Type N
- Type L
18: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- bi-annually
- annually
- regularly
19: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- 10
- 15
- III
20: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 1/16"
- 3/32"
21: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Zinc
- Nickel
- Magnesium
- Copper
22: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 20' above grade
- Not more than 3' above grade
- At least 15' above grade
23: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- condenser
- service valve
24: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class M machinery room
- Class A machinery room
- Class T machinery room
25: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above