Topics: ASHRAE/CMR
1: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
2: 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
3: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
4: 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.
- “UL”
- “UV”
- “U” or “UM”
- “UM” and “UV”
5: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Gate valve
- Glove valve
- Fusible plug
6: Stop valves shall not be permitted between the system and the
- condenser
- bleed valve
- relief valve
- service valve
7: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
8: 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
- 100,000
- 1,000
- 100
9: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
10: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
11: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
12: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- A group sensing
- phosgene gas sening
13: Pressure relief valves shall be marked with the data from
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
14: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
15: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
- shall be prohibited
16: 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
17: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
18: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
19: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
20: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 3.0
- 2.0
- 2.5
21: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 18 months
- every 24 months
22: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 10
- 25
23: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- B-2
- A-2
24: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- annually
- quarterly
- bi-annually
25: A professional or office building would be considered what type of occupancy?
- commercial
- business
- mercantile
- public assembly