Topics: ASHRAE/CMR
1: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
2: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
3: Who is permitted to access a refrigeration machine room?
- Any employee
- Contractors only
- Anyone, it's a completely safe area
- Authorized persons only
4: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and highly flammable
- toxic and non-flammable
- non-toxic and non-flammable
5: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
6: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
7: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-502
- R-113
- R-11
8: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
9: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
10: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 3/32"
- 1/16"
- 1/8"
11: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
12: Which refrigerant class listed below is the most flammable?
- C-3
- A-3
- B-2
- A-1
13: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
14: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When its white
- When there are sprinklers above
15: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 350
- 50
- 550
16: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
17: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
18: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 1
- 3
- 2
19: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the return air ducted system
- the outdoors
20: What does safe access mean?
- Locked doors
- OSHA approved
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
21: 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”
- “UM” and “UV”
- “U” or “UM”
- “UV”
22: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
- Section ASHREA 34
23: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Nothing must be done
24: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-12
- R-113
- R-22
- R-11
25: Indirect systems using Group II refrigerants
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only