Topics: ASHRAE/CMR
1: What pipe can not be used for refrigeration?
- N
- L
- K
- M
2: All serviceable components of a refrigeration system shall be provided with
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- safe access
- manufactures instructions on start-up procedures
3: How many refrigerant classifications are there for flammability?
- 2
- 1
- 3
- 7
4: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
5: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- the same
- lower
- there is no Group B1 refrigerants
6: Class T machine room
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class B machinery room
- Class A machinery room
- Class T machinery room
8: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Certified
- Coated
9: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 13.9 lbs
- 22 lbs
- 6.6 lbs
10: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
11: What would be the classification of a prison?
- Institutional
- Large mercantile
- Industrial
- Place of assembly
12: 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
13: 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
14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
15: How many refrigerant classifications are there for toxicity?
- 2
- 1
- 3
- 5
16: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
17: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
18: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 36
- 48
- 18
19: 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.
- “U” or “UM”
- “UM” and “UV”
- “UV”
- “UL”
20: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
21: Ammonia can come in contact with _______ ?
- Copper tubing
- Copper
- Aluminum
- Brass
22: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 1000F
- 600F
23: 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
24: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
25: R-22 falls under which safety classification?
- B-2
- B-1
- A-2
- A-1