Topics: ASHRAE/CMR
1: What is a Category "D" fluid?
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
2: The Department that certifies the transportation of refrigerant is the
- RSES
- DOT
- EPO
- EPA
3: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
- color codes
4: A movie theater would be considered a
- institutional occupancy
- public assembly occupancy
- mixed occupancy
- commercial occupancy
5: What is an example of institutional occupancy?
- Football stadium
- Hospital
- Shopping mall
- Dorms
6: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 3.0
- 5.5
- 2.0
- 2.5
7: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications
8: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Person in charge of the facility
- Board of Boilers
- Contractor who last serviced the system.
9: R-22 falls under which safety classification?
- A-2
- B-1
- A-1
- B-2
10: What refrigerant doesn't have to be classifted?
- R-717
- R-711
- R-134a
- R-718
11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class T machinery room
- Class M machinery room
- Class B machinery room
12: Can you use Ammonia in industrial applications?
- When mixed with R-718
- No, never
- Yes, always
- Yes, Under certain condidtions
13: 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
14: Which occupancy can ammonia be used in?
- industrial
- depends on the quantity of freon
- commercial
- redifential
15: 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
16: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Tight fitting doors
- Self-closing doors
- Fire hose connected to the building fire protection system.
17: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 12"
- 18"
- 36"
18: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
19: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- commercial occupancy
- illegal occupancy
- public assembly occupancy
- institutional occupancy
20: A relief valve discharge capacity is rated in
- PSIA
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIG
21: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
22: 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
23: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 75%
- 100%
24: 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
25: Name three things that must be done when changing refrigeration lubricant?
- Nothing must be done
- You can't change lubricants.
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ