Topics: ASHRAE/CMR
1: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- installed through a pipe casing
- moisture barrier
- insulated
2: Which refrigerant replaced R-12?
- R-134A
- R-410A
- R-22
- R-407A
3: How many groups of refrigerants are there?
- 3
- 7
- 1
- 5
4: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 1,000
- 6.6
- 330
5: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Contractor who last serviced the system.
- Board of Boilers
- Person who pulled the permit
6: What pipe can not be used for refrigeration?
- M
- N
- K
- L
7: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 1.5
- 2.2
- 1
8: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- mercantile occupancy
- commercial occupancy
9: 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
10: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
11: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-711
- R-718
12: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 100
- 330
- 200
13: NH3 is
- ammonia
- lithium bromide
- R-718
- R-508A
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: 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
16: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 25
- 66
17: Which refrigerant class listed below is the most flammable?
- C3
- A2
- B2
- A3
18: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Rupture disk
- Fusible plug
- Gate valve
19: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
20: 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, 3.0
- 3.0, 3.5
- 6.6, 6.6
- 2.5, 2.5
21: 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
22: How many refrigerant classifications are there for toxicity?
- 5
- 2
- 3
- 1
23: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection and a rupture disc
24: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
25: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct