Topics: ASHRAE/CMR
1: What section of ASHRAE-15 governs pressure vessels?
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 6 ASHRAE-34 ASME VIII unfired
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
2: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- the return air ducted system
- Machinery rooms need not be vented
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- place sign, check for leaks, insulate
- you can't change refrigerants
4: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-11
- Flush with RX-11
- Flush with ammonia
- Flush with R-718
5: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
6: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Upon installation
- Annually
- Not required
7: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 1 week
- 14 days
- 30 days
8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- low pressure
- critical pressure
- high pressure
9: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- higher
- the same
- lower
10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 5.5
- 2.5
11: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
12: 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
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- load-side of the contactor in
13: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
14: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-22
- R-123
- R-134A
15: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
16: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
17: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
- on top of the condensor
18: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 20'
- 30'
- 25'
19: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 24
- 18
20: 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
21: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-1
- A-1
- B-2
22: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
23: 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
- the low side
- the high side
- 2.5 times the design pressure
24: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
- Flammability and temperature range
25: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- yes
- no, unless there is proper ventilation system installed
- no