Topics: ASHRAE/CMR
1: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
2: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
3: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
4: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Certified
- Insulated and installed in a pipe duct (Encased)
- Classifed
5: What is an egress?
- A code violation
- An escape route
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
6: Pipe identification labels are required when the system contains more than
- 120 lbs
- 65 lbs
- 110 lbs
- 55 lbs
7: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
8: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 20 CFM
- 5 CFM
- 15 CFM
9: How many refrigerant classifications are there for flammability?
- 1
- 3
- 2
- 7
10: When must refrigeration system covered by the code be inspected?
- Annually
- Not required
- Upon installation
- Annually and when installed
11: R-22 is considered a(n)
- HCFC
- HFC
- HCFCH
- CFC
12: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
13: Ammonia belongs to Group
- A-2
- A-1
- B-1
- B-2
14: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
15: 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
16: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
17: What type of relief valve is used on a CO2 system?
- rupture disc
- gate valve
- glove disc
- fusible plug
18: 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
19: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and somewhat flammable
- toxic and non-flammable
- non-toxic and non-flammable
20: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
21: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
22: 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
- 75
- 55
23: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
24: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 1,000
- 110
25: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
- does not require a pressure-limiting device