Topics: ASHRAE/CMR
1: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
2: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Board of Boilers
- Person in charge of the facility
- Contractor who last serviced the system.
3: How are refrigerant blends classified?
- Based on best case Fractionation
- Blends don't have to be classified
- Based on worst case fractionation
- Based on the oil used
4: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Welded and seamed.
- Insulated and cross broke
- Flanged and gasketed
5: 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
6: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
7: Halogen refrigerants are corrosive to which type of metal?
- copper
- magnesium
- black iron
- stainless steel
8: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 660 lbs
- 330 lbs.
- 55 lbs
9: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type K
- Type N
10: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 1,000
- 110
- 330
- 6.6
11: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Zinc
- Magnesium
- Copper
12: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
13: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- Ceiling height
- 6'
- 7.25'
14: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- B-1
- A-2
15: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
16: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
17: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-502
- R-113
- R-12
18: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
19: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
20: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
21: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
22: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is a system highly likely to leak form a failed connection or component of such system
23: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- leak checked
- insulated
- installed through a pipe casing
24: How many different groups of refrigerants are there?
- 3
- 7
- 11
- 15
25: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above