Topics: ASHRAE/CMR
1: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-12
- R-22
- R-11
- R-113
2: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
- Nothing must be done
- Place sign, check for leaks, insulate
3: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- rupture plug
- relief plug
4: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- 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
5: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
6: How many gallons of water per pound of ammonia do you need?
- 20
- 1
- 15
- 5
7: What type of copper is not permitted on refrigeration systems?
- Type M
- Type K
- Type N
- Type L
8: What is R-22?
- Chlorodifluoromethane
- HFC
- CCFCM
- Chlorofluoromethane
9: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 36"
- 12"
10: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
11: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
12: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.D
- D.O.T
13: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 600F
- 700F
- 1000F
14: High pressure controls should be set no higher than
- 80% of set point
- 25% of set point
- 90% of set point
- 10% of set point
15: How many gallons of water do you need per pound of ammonia?
- 1
- 50
- 100
- 10
16: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
17: Which refrigerant class listed below is the most flammable?
- A-3
- C-3
- B-2
- A-1
18: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- lower
- higher
- the same
19: 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”
20: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
21: Indirect systems using Group II refrigerants
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
- 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
22: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-113
- R-11
23: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- the outdoors
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
24: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
25: How many flammability classifications are refrigerants in?
- 5
- 3
- 2
- 7