Topics: ASHRAE/CMR
1: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 7.00'
- 7.25'
- 8'4"
2: What is R-611’s ASHRAE Safety Code?
- C3
- B3
- B2
- A2
3: What is R-22?
- Chlorodifluoromethane
- HFC
- CCFCM
- Chlorofluoromethane
4: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Certified
- Leak checked
- Insulated and installed in a pipe duct (Encased)
5: 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.
- “UV”
- “UL”
- “U” or “UM”
- “UM” and “UV”
6: Ammonia is under what safety classification?
- B3
- B1
- B2
- A3
7: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
8: A relief valve discharge capacity is rated in
- PSIG
- Pounds of air per minute.
- PSIA
- temperature minus pounds of air per second divided by release rate squared
9: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
10: 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
11: 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
12: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
13: What refrigerant is an inorganic compound?
- R-132A
- R-22
- R-410A
- Ammonia
14: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Approved by the authorized person
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
15: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- the same
- lower
- there is no Group B1 refrigerants
16: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 1,000
- 100
- 100,000
17: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 50
- 350
- 100
18: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 36'
- 15'
19: Pressure relief valves shall be marked with the data from
- 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
- Section VIII Division of the ASME Boiler & Pressure Code
20: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 10
- 18
- 15
21: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
22: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- quarterly
- bi-annually
- regularly
23: What is the intention of the word “should” as used in the code?
- A mandatory requirement
- A recommendation or advisory guideline
- A technician’s choice of how it should be done
- None of the Above
24: How many groups of refrigerants are there?
- 1
- 7
- 5
- 3
25: A declaration test is needed when the system contains more than
- 120 lbs
- 110 lbs
- 65 lbs
- 55 lbs