Topics: ASHRAE/CMR
1: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 75%
- 90%
- 80%
2: Which occupancy can ammonia be used in?
- redifential
- commercial
- depends on the quantity of freon
- industrial
3: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
4: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
5: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
6: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
7: What is an example of institutional occupancy?
- Football stadium
- Dorms
- Hospital
- Shopping mall
8: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
9: Pipe identification labels are required when the system contains more than
- 65 lbs
- 110 lbs
- 55 lbs
- 120 lbs
10: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-123
- R-22
- R-11
11: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 660 lbs
- 55 lbs
- 550 lbs
12: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Flanged and gasketed
- Welded and seamed.
- Insulated and cross broke
13: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
14: What refrigerant were phased out in 2004?
- R-22
- R-12
- R-134a
- R-11
15: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
16: Indirect systems using Group II refrigerants
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used for mechanical equipment only
17: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- 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
- over pressure protection and a rupture disc
18: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
19: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- service manuals
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
20: 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
21: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 15'
- 30'
- 25'
22: 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
23: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or more
24: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
25: A Low-Probability System
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system