Topics: ASHRAE/CMR
1: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
2: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- zone valve
- pressure relief device
- low limit control
3: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Pressurized
- Insulated
- Leak tested
4: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
5: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113
6: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 660 lbs
- 55 lbs
- 330 lbs
7: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Copper
- Magnesium alloy
- PVC
8: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
9: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 18 months
- every 24 months
10: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- 20 CFM
- 5 CFM
- .5 CFM
11: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
12: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- 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
- it shall not be operated below prescribed pressuers
13: Ammonia (NH3) is a group III refrigerant
- True
- False
14: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “UV”
- “U” or “UM”
- “UM” and “UV”
15: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
16: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- B-2
- A-2
- A-1
17: 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.
- 15
- 55
- 50
- 75
18: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Insulated and installed in a pipe duct (Encased)
- Certified
- Leak checked
- Classifed
19: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Have it inspected
- Document the superheat and subcooling reading
20: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
21: What is an egress?
- An entrance or exit
- An escape route
- A code violation
- A valve put on the low side of the system to prevent frosting
22: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-502
- R-113
23: 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
24: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and non-flammable
25: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above