Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
- 65 lbs
- 120 lbs
- 110 lbs
- 55 lbs
2: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 90%
- 75%
3: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
4: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- PVC
- Magnesium alloy
- Copper
5: 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
6: All electrical work done on refrigeration systems must comply with
- Department of Energy
- OSHA
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
7: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- safe access
8: Ammonia can come in contact with _______ ?
- Copper
- Copper tubing
- Aluminum
- Brass
9: B3 refrigerants are considered
- non-toxic but non-flammable
- non-toxic but flammable
- toxic but non-flammable
- toxic and highly flammable
10: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
11: How many different groups of refrigerants are there?
- 3
- 11
- 7
- 15
12: How many refrigerant classifications are there for flammability?
- 2
- 7
- 3
- 1
13: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
14: R-22 is considered a(n)
- HCFCH
- CFC
- HCFC
- HFC
15: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
16: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- higher
- the same
- there is no Group B1 refrigerants
17: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the liquid side of the system
- the vapor side of the system
- high side of the system
18: Most CFC's are
- flammable
- inert but toxic
- inert
- toxic
19: What would be the classification of a church?
- Industrial
- Place of assembly
- Large mercantile
- Institutional
20: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and highly flammable
- toxic and non-flammable
- non-toxic and non-flammable
21: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- rupture plug
- fusion plug
- relief plug
22: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
23: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
24: 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
25: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above