Topics: ASHRAE/CMR
1: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
- the high side
2: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
3: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 cubic feet or more
- 3 cubic feet or more
- 15 square feet or less
4: 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
5: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 15
- 25
- 10
- III
6: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 100
- 90
- 110
- 80
7: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- 20 CFM
- .5 CFM
- 15 CFM
8: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-22
- R-134A
- R-123
9: Ammonia (NH3) is a group III refrigerant
- True
- False
10: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
- Notify the AHJ to let them know that the system been inspected
11: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 50
- 15
- 55
- 75
12: How many groups of refrigerants are there?
- 7
- 5
- 3
- 1
13: NH3 is
- ammonia
- R-718
- lithium bromide
- R-508A
14: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- When mixed with R-718
- Yes, always
- No, never
15: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
16: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 30'
- 20'
- 15'
17: 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
- 24 volt secondary side of the Class 2 transformer to the thermostat
- load-side of the contactor in
- first disconnect in
- breaker panel in
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Nickel
- Zinc
- Magnesium
19: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
20: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, wooden, fire door
21: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- Department of Energy
- OSHA
22: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
- An escape route
- A code violation
23: What section governs pressure vessels?
- OSHA
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
24: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
25: Which refrigerant replaced R-12?
- R-410A
- R-134A
- R-407A
- R-22