Topics: ASHRAE/CMR
1: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- ammonia
- HCFC-123
- Lithium bromide
- CFC-11
2: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- When mixed with R-718
- Yes, always
- No, never
3: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- higher
- the same
- there is no Group B1 refrigerants
4: A restaurant is classified as a
- large mercantile occupancy
- public assembly occupancy
- commercial occupancy
- mixed occupancy
5: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
6: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
7: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Nothing must be done
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
8: What section governs pressure vessels?
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
9: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
10: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 6.6
- 330
- 1,000
11: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 1000F
- 700F
- 800F
12: A hotel is considered a _______ occupancy.
- mercantile
- residential
- institutional
- commercial
13: How many refrigerant classifications are there for flammability?
- 7
- 3
- 1
- 2
14: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-2
- A-2
- B-1
15: What do you need to do when you install a new system?
- Add refrigerant
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Have it inspected
16: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- public assembly occupancy.
- commercial occupancy
- business occupancy
17: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
18: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
19: 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
20: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
21: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
22: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 550 lbs
- 55 lbs
- 330 lbs.
23: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- critical pressure
- design pressure
- low pressure
24: What type of material can't be used on the outlet of a relief valve?
- PVC
- Stainless steel
- Copper
- Magnesium alloy
25: R-22 falls under which safety classification?
- A-1
- A-2
- B-1
- B-2